CLEAN DIESEL TECHNOLOGIES INC
S-1, 1998-08-07
CHEMICALS & ALLIED PRODUCTS
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   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 7, 1998
                                                      REGISTRATION NO. 333-
===========================================================================
                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549

                           --------------------
                                  FORM S-1
                        REGISTRATION STATEMENT UNDER
                         THE SECURITIES ACT OF 1933

                           --------------------
                      CLEAN DIESEL TECHNOLOGIES, INC.
           (Exact name of registrant as specified in its charter)

       DELAWARE                    5169                    06-1393453
   (State or other           (Primary Standard          (I.R.S. Employer
   jurisdiction of              Industrial           Identification Number)
   incorporation or         Classification Code
    organization)                 Number)

                       300 ATLANTIC STREET, SUITE 702
                          STAMFORD, CT 06901-3522
                               (203) 327-7050
     (Address, including zip code, and telephone number, including area
             code, of registrant's principal executive offices)

                         CHARLES W. GRINNELL, ESQ.
                            HUTH & GRINNELL, LLC
                           1055 WASHINGTON BLVD.
                             STAMFORD, CT 06901
  (Name, address, including zip code, and telephone number, including area
                  code, of registrant's agent for service)
                PLEASE SEND COPIES OF ALL COMMUNICATIONS TO:

                             KENNETH ROSH, ESQ.
                  FRIED, FRANK, HARRIS, SHRIVER & JACOBSON
                             ONE NEW YORK PLAZA
                             NEW YORK, NY 10004
                               (212) 859-8000
  Approximate date of commencement of proposed sale to public: As soon as
   practicable after the effective date of this Registration Statement.

                           --------------------
  If any of the securities  being registered on this form are to be offered
on a delayed or continuous  basis pursuant to Rule 415 under the Securities
Act of 1933, check the following box. |X|

  If this Form is filed to register  additional  securities for an offering
pursuant to Rule 462(b) under the  Securities  Act, check the following box
and list the Securities Act  registration  statement  number of the earlier
effective registration statement for the same offering. |_|

  If this Form is a post-effective  amendment filed pursuant to Rule 462(c)
under the  Securities  Act, check the following box and list the Securities
Act  registration  statement number of the earlier  effective  registration
statement for the same offering. |_|

  If this Form is a post-effective  amendment filed pursuant to Rule 462(d)
under the  Securities  Act, check the following box and list the Securities
Act  registration  statement number of the earlier  effective  registration
statement for the same offering. |_|

  If delivery  of the  prospectus  is expected to be made  pursuant to Rule
434, please check the following box. |_|

                           --------------------
<TABLE>
<CAPTION>
                                                  CALCULATION OF REGISTRATION FEE
==========================================================================================================================
                                                                PROPOSED MAXIMUM    PROPOSED MAXIMUM
           TITLE OF EACH CLASS OF              AMOUNT TO BE      OFFERING PRICE         AGGREGATE           AMOUNT OF
        SECURITIES TO BE REGISTERED             REGISTERED       PER SHARE (FN1)   OFFERING PRICE (FN1)  REGISTRATION FEE
- --------------------------------------------- ---------------- ------------------- ------------------- -------------------
<S>                                           <C>              <C>                 <C>                 <C>
Rights to purchase shares of Series B
Convertible Preferred Stock, par value
$0.05 per share..............................     50,000              --                  --                -- (FN2)
- --------------------------------------------- ---------------- ------------------- ------------------- -------------------
Series B Convertible Preferred Stock, par
value $0.05 per share........................     50,000             $74.25            $3,712,500          $1,095.19
- --------------------------------------------- ---------------- ------------------- ------------------- -------------------
Common Shares, par value $0.05 per share.....    1,650,000             --                  --                -- (FN3)
==========================================================================================================================
<FN>
(1)  Estimated  solely for the purpose of calculating the  registration fee
     pursuant to Rule 457.

(2)  Pursuant to Rule 457(g),  no registration  fee is payable with respect
     to the  Rights  since  the  Rights  are being  registered  in the same
     registration  statement  as  the  securities  to be  offered  pursuant
     thereto.

(3)  Pursuant to Rule 457(i),  no registration  fee is payable with respect
     to the Common Shares since the Common  Shares are being  registered in
     the  same   registration   statement  as  the  securities   which  are
     convertible, for no additional consideration, into the Common Shares.

</FN>
</TABLE>

THE REGISTRANT  HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE  DATE UNTIL THE REGISTRANT
SHALL  FILE  A  FURTHER  AMENDMENT  WHICH  SPECIFICALLY  STATES  THAT  THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION  8(A) OF THE  SECURITIES  ACT OF 1933 OR  UNTIL  THIS  REGISTRATION
STATEMENT  SHALL BECOME  EFFECTIVE ON SUCH DATE AS THE  COMMISSION,  ACTING
PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.
===========================================================================

             SUBJECT TO COMPLETION, DATED ______________, 1998

PROSPECTUS

                      CLEAN DIESEL TECHNOLOGIES, INC.

  50,000 RIGHTS TO ACQUIRE SHARES OF SERIES B CONVERTIBLE PREFERRED STOCK

           50,000 SHARES OF SERIES B CONVERTIBLE PREFERRED STOCK

                      1,650,000 SHARES OF COMMON STOCK

                           --------------------

     Clean  Diesel   Technologies,   Inc.,  a  Delaware   corporation  (the
"Company"),  is  distributing  to holders (the  "Holders") of the Company's
outstanding  common shares, par value $0.05 per share (the "Common Shares")
of record at the close of business on __________,  1998 (the "Record Date")
transferable  rights (the "Rights") to subscribe  (the "Basic  Subscription
Privilege")  for and purchase an  aggregate  of up to 50,000  shares of the
Company's  Series B Convertible  Preferred Stock, par value $0.05 per share
(the "Series B Preferred  Stock" and with respect to the Series B Preferred
Stock underlying the Rights, the "Offering Shares"). The Rights will expire
at 5:00 p.m.,  Eastern Standard Time, on _______ ___, 1998, unless extended
as described herein (the "Expiration  Date"). The term "Rights Offering" or
"Offering" includes the distribution of the Rights and the issuances of the
Offering Shares upon the exercise of the Rights.

     A Holder  will  receive  the Right to  purchase  one share of Series B
Preferred  Stock for each 50 Common  Shares  held on the  Record  Date (the
"Underlying   Shares");   provided,   however,  that  Rights  will  not  be
distributed  to Holders who reside in  jurisdictions  where the  securities
offered  hereby (the  "Securities")  have not been  registered  or where an
exemption  from  registration  is not  available,  as described  more fully
below. Each Right will entitle the Holder to purchase one share of Series B
Preferred Stock for $_____ per share (the "Subscription  Price"),  and each
share of Series B Preferred  Stock will be immediately  convertible,  at no
cost to the Holder thereof,  into 33 Common Shares. No fractional Rights or
cash in lieu thereof will be distributed or paid by the Company. The number
of Rights distributed will be rounded down to the nearest whole number. The
Rights will be evidenced by transferable certificates;  provided,  however,
that the Oversubscription  Privilege (as defined below) is not transferable
and  transferees of Rights in  jurisdictions  where the Securities have not
been  registered or where an exemption from  registration  is not available
may not exercise the rights.

Cover continued on following page.

     THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION,  THE SERIES B PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:   ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

                           --------------------

     ONCE A HOLDER HAS  EXERCISED  ANY  RIGHTS,  SUCH  EXERCISE  MAY NOT BE
REVOKED.  PRIOR TO  DECIDING  TO EXERCISE  OR SELL  RIGHTS,  ANY  POTENTIAL
INVESTORS SHOULD CAREFULLY CONSIDER THE FACTORS SET FORTH BELOW UNDER "RISK
FACTORS"  BEGINNING  ON PAGE 13 IN  ADDITION TO THE OTHER  INFORMATION  SET
FORTH IN THIS PROSPECTUS.

                           --------------------

     THESE  SECURITIES  HAVE  NOT  BEEN  APPROVED  OR  DISAPPROVED  BY  THE
SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION,  NOR
HAS  THE  SECURITIES  AND  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES
COMMISSION  PASSED UPON THE  ACCURACY OR ADEQUACY OF THIS  PROSPECTUS.  ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

- ---------------------------------------------------------------------------
                                     Price to             Proceeds to
                                      Public              Company (FN1)
- ---------------------------------------------------------------------------
Per Share...................  $              --      $              --
- ---------------------------------------------------------------------------
Total Minimum...............  $ __________________   $ _________________
- ---------------------------------------------------------------------------
         Maximum............  $ __________________   $ _________________
- ---------------------------------------------------------------------------

(1)  Before offering and subscription expenses.

                           --------------------

DELIVERY OF THE CERTIFICATES REPRESENTING THE RIGHTS IS EXPECTED TO BE MADE
ON OR ABOUT ____ _, 1998.

                           --------------------

              THE DATE OF THIS PROSPECTUS IS __________, 1998

[RED HERRING]
Information  contained  herein is subject to  completion  or  amendment.  A
registration statement relating to these securities has been filed with the
Securities and Exchange  Commission.  These  securities may not be sold nor
may offers to buy be accepted prior to the time the registration  statement
becomes effective. This prospectus shall not constitute an offer to sell or
the  solicitation  of an offer to buy nor shall  there be any sale of these
securities in any State in which such offer,  solicitation or sale would be
unlawful prior to registration or  qualification  under the securities laws
of any such State.

     Each Holder may also subscribe ("the  Oversubscription  Privilege") at
the  Subscription  Price for some or all of the additional  Offering Shares
available  after  satisfaction of all  subscriptions  pursuant to the Basic
Subscription Privilege. The Oversubscription Privilege is not transferable.
A Holder of Rights may,  at the time of exercise of the Basic  Subscription
Privilege,  exercise the Oversubscription  Privilege for up to an aggregate
of  50,000  Offering  Shares  (the  "Maximum  Offering  Shares")  minus the
Offering  Shares  subscribed  for by  such  Holder  pursuant  to the  Basic
Subscription  privileges.  If an insufficient  number of Offering Shares is
available to satisfy fully all  elections to exercise the  Oversubscription
Privilege,  then the available  Offering Shares will be allocated among the
Holders  exercising  their  Oversubscription  Privilege such that each such
Holder will be entitled  to receive a number of  Offering  Shares  which is
equal  to the  number  of  Offering  Shares  subscribed  to by such  Holder
pursuant to the Oversubscription  Privilege  multiplied by a fraction,  the
numerator of which is the number of the then available  Offering Shares and
the  denominator  of which  is the  aggregate  number  of  Offering  Shares
subscribed to pursuant to the Oversubscription Privilege. If a proration of
the Offering  Shares results in a Holder  receiving  fewer Offering  Shares
than such Holder subscribed for pursuant to the Oversubscription Privilege,
then any  excess  funds paid by the  Holder as the  Subscription  Price for
shares  not issued  will be  returned  by the  Subscription  Agent  without
interest or deduction.

     The Company shall  terminate the Rights  Offering if on the Expiration
Date the Company receives aggregate cash proceeds of less than $2.0 million
from the exercise of Rights.  On June 30,  1998,  the last day on which the
Company's   Common  Shares  were  listed  on  the  Nasdaq  National  Market
("Nasdaq"),  the  average  of the high and low sales  prices of the  Common
Shares was $1.75 per share. As of July 1, 1998, the Company's Common Shares
are no longer  listed and traded on Nasdaq but  currently  trade on the OTC
Electronic  Bulletin  Board,  although no assurances can be given that such
shares will continue to trade thereon or in the over-the-counter market, in
what are commonly  referred to as the "pink  sheets." As of August 4, 1998,
the last sale price for the Common Shares as reported by the OTC Electronic
Bulletin  Board was $1.88 per  Common  Share.  Neither  the  Rights nor the
Series B Preferred Stock will be listed on an exchange.

     The Company shall pay broker-dealers fees for their soliciting efforts
(the "Soliciting  Fees") of ten percent of the Subscription  Price paid for
each Right which is  subscribed;  provided that such fees will only be paid
in respect of Rights exercised in those jurisdictions described under "PLAN
OF DISTRIBUTION -- Distribution  Arrangements." The Soliciting Fees will be
paid directly to the broker-dealer  designated on the applicable portion of
the  Rights   Certificate.   Soliciting  fees  will  not  be  paid  on  any
undesignated exercises of Rights.

     AN INVESTMENT  IN THE  SECURITIES  OFFERED  HEREBY IS  SPECULATIVE  IN
NATURE AND INVOLVES A HIGH DEGREE OF RISK. AN INVESTMENT IN THE  SECURITIES
SHOULD NOT BE MADE BY AN INVESTOR WHO CANNOT  AFFORD THE LOSS OF HIS OR HER
ENTIRE INVESTMENT.

     THE DISTRIBUTION OF THIS PROSPECTUS AND THE OFFERING OF THE SECURITIES
IN CERTAIN JURISDICTIONS MAY BE RESTRICTED BY LAW. NO ACTION HAS BEEN TAKEN
BY THE  COMPANY  THAT WOULD  PERMIT AN OFFERING  OF THE  SECURITIES  OR THE
CIRCULATION OR DISTRIBUTION OF THIS PROSPECTUS OR ANY OFFERING  MATERIAL IN
RELATION TO THE COMPANY OR THE SECURITIES IN ANY COUNTRY OUTSIDE THE UNITED
STATES WHERE ACTION FOR THAT PURPOSE IS REQUIRED.

                           --------------------

     THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS WITHIN THE MEANING
OF SECTION 27A OF THE SECURITIES  ACT OF 1933, AS AMENDED (THE  "SECURITIES
ACT"). DISCUSSION CONTAINING SUCH FORWARD-LOOKING  STATEMENTS WILL BE FOUND
IN THE MATERIAL SET FORTH UNDER "PROSPECTUS  SUMMARY," "RISK FACTORS," "USE
OF PROCEEDS,"  "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS" AND "BUSINESS," AS WELL AS WITHIN THE PROSPECTUS
GENERALLY.  ACTUAL RESULTS COULD DIFFER  MATERIALLY FROM THOSE PROJECTED IN
THE  FORWARD-LOOKING  STATEMENTS  AS A RESULT OF THE RISK FACTORS SET FORTH
UNDER  "RISK  FACTORS"  AND  THE  MATTERS  SET  FORTH  IN  THIS  PROSPECTUS
GENERALLY.  THE COMPANY  CAUTIONS  THE READER,  HOWEVER,  THAT THIS LIST OF
FACTORS MAY NOT BE EXHAUSTIVE.

                           --------------------

                           AVAILABLE INFORMATION

     The Company  currently  reports under the  Securities  Exchange Act of
1934, as amended (the "Exchange Act"), and, in accordance therewith,  files
reports and other  information with the Securities and Exchange  Commission
(the "Commission"). Such reports and other information can be inspected and
copied at the public reference facilities  maintained by the Commission at:
Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549;
Northwestern  Atrium Center, 500 West Madison Street,  Suite 1400, Chicago,
Illinois  60661;  and Seven World Trade Center,  13th Floor,  New York, New
York 10048.  Copies of such  material  also can be obtained from the Public
Reference Section of the Commission,  at Judiciary Plaza, 450 Fifth Street,
N.W., Washington, D.C. 20549, at prescribed rates. The Commission maintains
a web site that contains  reports,  proxy and  information  statements  and
other information  regarding  registrants that file electronically with the
Commission.  The address of such site is  http://www.sec.gov.  In addition,
through June 30, 1998,  the Company's  Common Shares were listed and traded
on Nasdaq  under the symbol  "CDTI",  but as of July 1, 1998 were  delisted
therefrom.  Reports and other information,  including proxy and information
statements,  for  periods  during  which the Common  Shares  were listed on
Nasdaq  can be  inspected  and  copies  can be made at the  offices  of the
National  Association  of Securities  Dealers,  Inc.  (the "NASD"),  1735 K
Street, N.W., Washington, D.C. 20006.

     The Company has filed with the  Commission,  450 Fifth  Street,  N.W.,
Washington,   D.C.  20549,  a  Registration  Statement  on  Form  S-1  (the
"Registration  Statement")  under the  Securities  Act, with respect to the
Securities  offered  hereby.  This  Prospectus  does  not  contain  all the
information  set  forth  in the  Registration  Statement  and the  exhibits
thereto,  as permitted by the Rules and Regulations of the Commission.  For
further information, reference is made to the Registration Statement and to
the exhibits filed therewith. Statements contained in this Prospectus as to
the contents of any contract or other  document  which has been filed as an
exhibit to the  Registration  Statement  are  qualified  in all respects by
reference  to such  exhibits  for a complete  statement  of their terms and
conditions.  The  Registration  Statement  and  exhibits  may be  inspected
without  charge and copied upon  payment of  prescribed  fees at the public
reference facilities  maintained by the Commission at the address set forth
above.

     The Company  intends to furnish the  Holders of the  Company's  Common
Shares with annual reports  containing  financial  statements audited by an
independent  public  accounting  firm and, in addition to filing  quarterly
reports on Form 10-Q with the  Commission,  the  Company  will issue  press
releases  containing  summary  financial  information for each of the first
three fiscal quarters of each fiscal year.


                             PROSPECTUS SUMMARY

     The  following  summary is provided  for  convenience  only and is not
intended to be  complete.  It is qualified in its entirety by and should be
read in  conjunction  with  the more  detailed  information  and  Financial
Statements  (including  the  Notes  thereto)  appearing  elsewhere  in this
Prospectus.  For  purposes of this  document,  (i)  "minimum  subscription"
assumes the  exercise in cash of a  sufficient  number of Holders such that
the  aggregate  cash  proceeds to the Company  equal $2.0  million and (ii)
"full  subscription"  assumes the  purchase of all of the  Offering  Shares
offered  hereby,  including  the  exercise in cash of the  Oversubscription
Privilege by certain  Holders to  compensate  for those  Holders who do not
exercise the Basic Subscription in full.


                                THE COMPANY

GENERAL

     The Company, a Delaware corporation with a principal place of business
at 300 Atlantic Street, Stamford, Connecticut 06901, is a development-stage
specialty  chemical company supplying advanced catalytic fuel additives and
systems that reduce  harmful  emissions  from internal  combustion  engines
while improving fuel economy.  The Company's two main technology  areas are
Platinum  Fuel  Catalysts  ("PFCs") for  emission  control and fuel economy
improvement  in diesel- and  gasoline-fueled  engines,  and nitrogen  oxide
("NOx")  reduction  systems and chemicals for control of NOx emissions from
diesel engines.

BACKGROUND

     The  Company  was  formed  in 1994 as a  wholly  owned  subsidiary  of
Fuel-Tech  N.V.  ("Fuel  Tech"),  which  had  conducted   fundamental  work
regarding the Company's technologies. The Company was spun off by Fuel Tech
in a rights  offering in December  1995 (the "1995 Rights  Offering"),  and
Fuel Tech currently owns 27.4% of the Company's  outstanding Common Shares.
The Company raised net proceeds of approximately  $10.5 million in the 1995
Rights  Offering  which,   following  the  repayment  of  $2.3  million  of
intercompany  loans to Fuel  Tech,  was  sufficient  to fund the  Company's
operations through May of 1998. The Company has since funded its operations
through the net proceeds received in connection with the issuance of bridge
loan notes (the "Bridge Loan Notes")  issued to Fuel Tech and certain other
lenders.

     At its inception, the Company had a limited number of patents for PFCs
licensed from Fuel Tech and limited  testing  results of PFCs.  The Company
currently  has 12  U.S.  and 38  International  patents  on  PFCs  and  NOx
reduction  systems and has another 83 U.S. and  International  applications
pending.  In addition,  the Company has completed  successful  testing of a
diesel  fuel  PFC  additive,  launched  the  marketing  of a  PFC  used  to
rejuvenate aged catalytic  converters in Europe, and developed the Advanced
Reagent  Injection  System  ("ARIS(TM)  2000")  for  use in  catalytic  NOx
reduction systems.

BUSINESS STRATEGY

     The Company's strategic objective is to become a leading developer and
supplier of (i) PFCs for emission  control and fuel economy  improvement in
diesel-  and  gasoline-fueled  engines and (ii) NOx  reduction  systems and
chemicals for control of NOx emissions from diesel engines. Key elements of
the Company's strategy include the following:

DEVELOPING MARKETS FOR PFCS AS A DIESEL FUEL ADDITIVE

     The Company  has  successfully  concluded  a study at Delft  Technical
University in the Netherlands  concerning the emission reduction effects of
PFCs used with ceramic filters for reduction in particulate  emission.  The
Company has also  demonstrated  improved  emission  reduction and increased
fuel  economy  from the use of PFCs  without  ceramic  filters in  separate
programs  at Ricardo  Consulting  Engineers  Ltd.  ("Ricardo")  and Cummins
Engine Co.  ("Cummins").  The  Company  seeks to  capitalize  on these test
results,  coupled with the increased regulation of emissions, by developing
a market for PFCs in the U.S. and abroad.

DEVELOPING MARKETS FOR PFCS AS A GASOLINE ADDITIVE

     The Company seeks to continue its marketing of PFCs used to rejuvenate
aged catalytic  converters,  and has begun to focus on selling this product
through  service   centers  in  Europe  in  conjunction   with  Holt  Lloyd
International  Ltd.  ("Holts").  The  Company  is  also  seeking  marketing
partners to help launch the gasoline product in the U.S. and Asia.

COMMERCIALIZING THE ARIS(TM) 2000

     The  Company  has  developed  a prototype  of the  ARIS(TM)  2000,  an
Advanced  Reagent  Injection  System to be used in the selective  catalytic
reduction  of NOx.  The  Company  believes  that  there is a market for the
ARIS(TM) 2000 as a result of increased  regulations  in California  and the
Northeast of NOx levels in new and existing large stationary  diesels.  The
Company  seeks to  commercialize  the  ARIS(TM)  2000  through  cooperative
ventures and licenses with engine manufacturers,  engine distributors,  and
catalyst and emission control companies.

     The Company  believes  that the net  proceeds of the Rights  Offering,
together with the net proceeds received in connection with the $1.4 million
bridge loan  financing  effected in 1998,  will be  sufficient  to fund the
foregoing  commercialization  efforts through  January 2000  (assuming full
subscription) and through April 1999 (assuming minimum  subscription).  See
"USE OF PROCEEDS" and "RISK FACTORS."

                            THE RIGHTS OFFERING

Rights............. The  Company  is  issuing  to each  Holder of record of
                    Common Shares on the Record Date one transferable Right
                    for each 50 Common Shares held; provided, however, that
                    Rights will not be distributed to Holders who reside in
                    jurisdictions  in which  the  Securities  have not been
                    registered or where an exemption from  registration  is
                    not  available,  as  described  more fully  below,  and
                    transferees  of  Rights  in  jurisdictions   where  the
                    Securities   have  not  been  registered  or  where  an
                    exemption  from  registration  is not available may not
                    exercise  the  Rights.   See  "THE  RIGHTS  OFFERING --
                    Jurisdictions in Which the Securities Are Offered." The
                    Rights will be  evidenced  by Rights  Certificates.  An
                    aggregate   of  up  to   50,000   Rights   will  be  so
                    distributed.  No  fractional  Rights  or  cash  in lieu
                    thereof will be distributed or paid by the Company. The
                    number of Rights  distributed  will be rounded  down to
                    the nearest  whole  number.  As  described  below under
                    "Amendment and Termination," the Company will terminate
                    the Rights Offering if on the Expiration Date less than
                    an aggregate of $2.0 million  worth of Rights have been
                    exercised  (calculated  based upon a per  Common  Share
                    price of $2.25,  a 12.5%  premium  over the average bid
                    and ask prices of such shares over the five most recent
                    business  days).  Accordingly,  assuming a Subscription
                    Price   of   $74.25,   a   minimum    subscription   of
                    approximately  26,937  Offering  Shares pursuant to the
                    exercise of the Rights is necessary to proceed with the
                    Rights  Offering.   See  "THE  RIGHTS  OFFERING --  The
                    Rights."


Basic Subscription
Privilege.......... Each Right will entitle the Holder  thereof to purchase
                    at  the  Subscription  Price  one  share  of  Series  B
                    Preferred Stock. Each share of Series B Preferred Stock
                    will  be  immediately  convertible,  at no  cost to the
                    Holder  thereof,  into 33 Common  Shares.  Certificates
                    representing  Offering Shares purchased pursuant to the
                    Basic  Subscription  Privilege will be delivered to the
                    subscribers as soon as practicable after the Expiration
                    Date and after all prorations contemplated by the terms
                    of the Rights  Offering  have been  effected.  See "THE
                    RIGHTS OFFERING -- Subscription Privileges."

Oversubscription
Privilege.......... Each  Holder  who  exercises  all of his or her  Rights
                    pursuant  to  the  Basic  Subscription   Privilege  may
                    indicate on the Rights Certificate additional shares of
                    Series B Preferred  Stock above the Basic  Subscription
                    Privilege up to the Maximum Offering Shares such Holder
                    would like to purchase at the  Subscription  Price. The
                    Oversubscription  Privilege is not transferable.  After
                    the  Expiration  Date,  the  Company  will issue  those
                    Offering   Shares  not  purchased   through  the  Basic
                    Subscription  Privilege  to the  Holders  who  wish  to
                    exercise  their  Oversubscription   Privilege.   If  an
                    insufficient  number of Offering Shares is available to
                    satisfy   fully   all   elections   to   exercise   the
                    Oversubscription Privilege, then the available Offering
                    Shares will be allocated  among the Holders  exercising
                    their  Oversubscription  Privilege  such that each such
                    Holder will be entitled to receive a number of Offering
                    Shares which is equal to the number of Offering  Shares
                    subscribed   to  by  such   Holder   pursuant   to  the
                    Oversubscription  Privilege  multiplied  by a fraction,
                    the  numerator  of  which  is the  number  of the  then
                    available  Offering Shares and the denominator of which
                    is  the  aggregate   number  of  the  Offering   Shares
                    subscribed   to   pursuant   to  the   Oversubscription
                    Privilege.  If  a  proration  of  the  Offering  Shares
                    results in a Holder  receiving  fewer  Offering  Shares
                    than  such  Holder   subscribed  for  pursuant  to  the
                    Oversubscription  Privilege, then any excess funds paid
                    by that Holder as the Subscription Price for shares not
                    issued  will  be  returned  by the  Subscription  Agent
                    without   interest  or   deduction.   See  "THE  RIGHTS
                    OFFERING -- Subscription Privileges."

Series B Preferred
Stock.............. Holders of the Series B Preferred Stock are entitled to
                    receive,  when,  as and if declared by the Board out of
                    funds of the Company legally available  therefor,  cash
                    dividends at the annual rate of 9% of the $________ per
                    share   price   and    liquidation    preference   (the
                    "Liquidation Preference");  provided,  however, that in
                    lieu of  making  dividends  in cash,  the  Company  may
                    elect,  by giving  written notice to each holder of the
                    Series B Preferred  Stock,  to pay dividends in kind at
                    the annual  rate of 11% of the  Liquidation  Preference
                    (cash  dividends  and dividends in kind are each deemed
                    "Preferred Dividends").

                    Shares of Series B Preferred  Stock are convertible (at
                    the  Liquidation  Preference of $______ per share),  in
                    whole or in part, at the option of the holders  thereof
                    ("Optional  Conversion"),   into  Common  Shares  at  a
                    conversion price of $____ per Common Share  (equivalent
                    to a conversion rate of 33 Common Shares for each share
                    of  Series  B  Preferred  Stock  so  converted),  which
                    conversion  price  will be  deemed to have been paid in
                    full, at no extra cost to the holder thereof,  with the
                    tendering of the Series B Preferred Stock in connection
                    with the conversion  thereof,  subject to adjustment as
                    set  forth  in  the  Certificate  of  Designation.  The
                    Company  can force the holder to  convert  his Series B
                    Preferred  Stock,  in  whole or in  part,  into  Common
                    Shares  at any  time on or  after  the  date  that  the
                    average Closing Price (as defined in the Certificate of
                    Designation)  of the  Common  Shares  equals or exceeds
                    $4.50 for 20 consecutive Trading  Days  (as defined  in
                    the Certificate of Designation).

                    In  the   event  of  any   voluntary   or   involuntary
                    liquidation, dissolution, or winding up of the Company,
                    and  subject  to the  rights  of  holders  of any other
                    series of Preferred  Stock,  the holders of outstanding
                    shares of Series B  Preferred  Stock  are  entitled  to
                    receive  the sum of $______  per share in cash for each
                    share of Series B  Preferred  Stock,  plus  accrued and
                    unpaid Preferred  Dividends thereon,  out of the assets
                    of  the   Company   available   for   distribution   to
                    stockholders, before any distribution of assets is made
                    to holders of Common  Shares or any other capital stock
                    ranking  junior to the  shares  of  Series B  Preferred
                    Stock and pari passu with holders of Series A Preferred
                    Stock upon a liquidation, dissolution, or winding up of
                    the  Company.  

                    Certificates  representing shares of Series B Preferred
                    Stock  will  include a legend to the  effect  that such
                    securities  may not be  transferred  to any resident of
                    any of the following states: Arizona, Florida, Georgia,
                    Ohio,  Pennsylvania  or  Texas.  See  "DESCRIPTION  OF
                    CAPITAL   STOCK  --   Preferred   Stock  --   Series  B
                    Convertible Preferred Stock."

Record Date........ _______________ __ , 1998

Subscription
Price.............. The Subscription Price is $_______ per Offering Share.

Expiration Date
for Rights......... The Rights  Offering will expire at 5:00 p.m.,  Eastern
                    Standard  Time,  on   _______________,   1998,   unless
                    extended by the Board of Directors  of the Company,  in
                    which case the term  "Expiration  Date"  shall mean the
                    latest  date and time to which the Rights  Offering  is
                    extended.

Exercise of
Rights............. The    Basic    Subscription    Privilege    and    the
                    Oversubscription Privilege may be exercised by properly
                    completing  the  Rights  Certificates   evidencing  the
                    Rights  and  forwarding   them,  with  payment  of  the
                    Subscription Price for each share of Series B Preferred
                    Stock subscribed for pursuant to the Basic Subscription
                    Privilege and the  Oversubscription  Privilege,  to the
                    Subscription Agent prior to the Expiration Date. If the
                    aggregate  Subscription  Price  paid  by an  exercising
                    Rights Holder is insufficient to purchase the number of
                    shares  of Series B  Preferred  Stock  that the  Holder
                    indicates are being subscribed for, or if an exercising
                    Rights  Holder does not specify the number of shares of
                    Series  B  Preferred  Stock to be  purchased,  then the
                    Rights Holder will be deemed to have exercised,  first,
                    the  Basic  Subscription  Privilege  and,  second,  the
                    Oversubscription Privilege to purchase shares of Series
                    B  Preferred  Stock to the full  extent of the  payment
                    tendered.  If the aggregate  Subscription Price paid by
                    an  exercising   Rights   Holder   exceeds  the  amount
                    necessary  to purchase the number of shares of Series B
                    Preferred   Stock  for  which  the  Rights  Holder  has
                    indicated an intention  to  subscribe,  then the Rights
                    Holder  will be deemed to have  exercised,  first,  the
                    Basic  Subscription  Privilege  (if not  already  fully
                    exercised) and, second, the Oversubscription  Privilege
                    to the full extent of the excess payment tendered. Once
                    a Rights Holder has  exercised  the Basic  Subscription
                    Privilege  or  the  Oversubscription   Privilege,  such
                    exercise may not be revoked.  See "THE RIGHTS  OFFERING
                    -- Exercise of Rights."  Any Rights not duly  exercised
                    prior to the  Expiration  Date will  expire  and become
                    worthless.

Amendment and
Termination........ The Board of Directors reserves the right to extend the
                    Expiration  Date and to amend the terms and  conditions
                    of the Rights Offering. Any extension, if made, will be
                    publicly  announced  through a release to the Dow Jones
                    News  Service and as otherwise  required by  applicable
                    law or  regulations.  In the event of a material change
                    in the terms of the Rights  Offering,  there will be an
                    affirmative  resolicitation  of the Rights  Offering by
                    means of a post-effective amendment to the Registration
                    Statement.  In the  event  of  such  a  resolicitation,
                    subscribing  Holders will be deemed to have effectively
                    revoked their  subscriptions  unless they affirmatively
                    confirm   their   intent   to   subscribe,   and  their
                    subscription  payments will be returned to them without
                    interest or  deduction.  The Board of  Directors of the
                    Company  in its  sole  discretion,  may  terminate  the
                    Rights Offering and revoke the Rights at any time prior
                    to the Expiration Date or thereafter. In any event, the
                    Company shall  terminate the Rights  Offering if on the
                    Expiration  Date the Company  receives  aggregate  cash
                    proceeds of less than $2.0 million from the exercise of
                    Rights. In the event of such  termination,  the Company
                    will  promptly  return to all  persons  that  exercised
                    Rights their subscription payments, without interest or
                    deduction.  See "THE RIGHTS  OFFERING -- Amendment  and
                    Termination."

Method of
Transferring
Rights............. Rights  may  be  purchased   or  sold   through   usual
                    investment channels, including banks and brokers. There
                    can be no assurance  that an active market will develop
                    for the Rights.  The Rights,  the underlying  shares of
                    Series B Preferred Stock and the Common Shares issuable
                    upon conversion of the Series B Preferred  Stock,  will
                    not be eligible for trading on Nasdaq.

                    The Rights evidenced by a single Rights Certificate may
                    be   transferred  in  whole  by  endorsing  the  Rights
                    Certificate   for  transfer  in  accordance   with  the
                    accompanying  instructions;  provided, that the related
                    Oversubscription  Privilege may not be exercised by the
                    transferee   thereof  and   transferees  of  Rights  in
                    jurisdictions   where  the  Securities  have  not  been
                    registered or where an exemption from  registration  is
                    not available.  A portion of the Rights  evidenced by a
                    single Rights Certificate (but not fractional Rights or
                    the   Oversubscription   Privilege  or  to  persons  in
                    jurisdictions   where  the  Securities  have  not  been
                    registered or where an exemption from  registration  is
                    not  available) may be transferred by delivering to the
                    Subscription  Agent  a  Rights   Certificate   properly
                    endorsed for transfer,  with  instructions  to register
                    such  portion  of the Rights  evidenced  thereby in the
                    name  of the  transferee  (and to  issue  a new  Rights
                    Certificate   to   the   transferee   evidencing   such
                    transferred  Rights).  In  such  event,  a  new  Rights
                    Certificate  evidencing  the balance of the Rights will
                    be issued to the Rights Holder or, if the Rights Holder
                    so  instructs,   to  an  additional   transferee.   The
                    Oversubscription Privilege is not transferable.

                    Holders of Rights  wishing to transfer all or a portion
                    of their Rights (subject to the  limitations  described
                    above)  should allow a sufficient  amount of time prior
                    to  the   Expiration   Date   for  (i)   the   transfer
                    instructions  to  be  received  and  processed  by  the
                    Subscription  Agent, (ii) a new Rights  Certificate for
                    the transferred  Rights to be issued and transmitted to
                    the  transferee  or   transferees   and  a  new  Rights
                    Certificate  for any  retained  Rights to be issued and
                    transmitted  to the  transferor  and (iii)  the  Rights
                    evidenced  by  such  new  Rights   Certificates  to  be
                    exercised or sold by the  recipients  thereof.  Neither
                    the Company nor the  Subscription  Agent shall have any
                    liability to a transferee  or  transferor  of Rights if
                    Rights  Certificates  are  not  received  in  time  for
                    exercise or sale prior to the Expiration Date.

                    Except for fees paid to  broker-dealers  and charged by
                    the  Subscription  Agent  that  will  be  paid  by  the
                    Company,  all  commissions,  fees  and  other  expenses
                    (including  brokerage  commissions  and transfer taxes)
                    incurred  in  connection  with  the  purchase,  sale or
                    exercise  of  Rights  will  be for the  account  of the
                    shareholder  transferor  of the Rights and none of such
                    commissions,  fees  or  expenses  will  be  paid by the
                    Company or the Subscription Agent.

                    The Rights will be eligible for transfer  through,  and
                    the exercise of the Rights may be effected through, the
                    facilities  of the  Transfer  Agent.  See  "THE  RIGHTS
                    OFFERING -- Method of Transferring Rights."

Jurisdictions
in Which the
Securities Are
Offered............ RIGHTS  WILL  ONLY  BE  GRANTED  TO,  AND  MAY  ONLY BE
                    EXERCISED  BY,  HOLDERS IN COLORADO,  CONNECTICUT,  THE
                    DISTRICT OF COLUMBIA,  ILLINOIS, INDIANA, IOWA, KANSAS,
                    MAINE, MARYLAND, MASSACHUSETTS, NEVADA, NEW JERSEY, NEW
                    YORK, NORTH CAROLINA,  RHODE ISLAND, VERMONT,  VIRGINIA
                    AND WASHINGTON AND OUTSIDE THE UNITED STATES.  See "THE
                    RIGHTS   OFFERING   --   Jurisdictions   in  Which  the
                    Securities Are Offered."

U.S. Tax
Consequences....... Holders  who  receive  Rights  will be  deemed to be in
                    receipt  of  property  in an  amount  equal to the fair
                    market  value (the  "Value")  of the Rights on the date
                    they are distributed.  Whether the receipt of Rights by
                    a  Holder  will  result  in  taxable   income  and  the
                    characterization  of  such  income,  if  any,  will  be
                    dependent  on whether the  Company  has current  and/or
                    accumulated earnings and profits ("E&P"), the tax basis
                    of the stock held by the  Holder,  and the Value of the
                    Rights.  Management  of the Company  believes  that the
                    Company will have no current and/or accumulated E&P for
                    the taxable  year in which the Rights are  distributed,
                    although  no  assurances  can be given in this  regard.
                    Neither the  exercise of the Rights nor  conversion  of
                    the Series B Preferred  Stock into Common  Shares would
                    result in a taxable event.  See "THE RIGHTS OFFERING --
                    Certain United States  Federal Income Tax  Consequences
                    to Holders."

Capital Stock
to be Outstanding
After Offering..... 2,516,666 Common Shares(FN1)
                    2,800 shares of Series A Preferred Stock(FN2)
                    50,000 shares of Series B Preferred Stock(FN3)

Net Cash Proceeds
from the
Offering(FN4)...... $3.1 million

Use of Proceeds ... The net  proceeds  of the  Offering  will be  used for:
                    marketing,  field trials and patents;  repayment  under
                    the Term Loan (as defined  below) to Fuel Tech; and the
                    balance  for  working  capital  and  general  corporate
                    purposes. See "USE OF PROCEEDS."

Subscription
Agent ............. ChaseMellon Shareholder Services, L.L.C.

Information Agent.. ChaseMellon Shareholder Services, L.L.C.

- -----------------------------

(1)  Excludes  427,784  Common Shares  issuable  under the Company's  stock
     option plan, 75,000 shares issuable upon exercise of certain warrants,
     933,324  Common  Shares  which would be issuable  upon  conversion  of
     Series A Preferred Stock which are expected to be issued to Holders of
     Bridge Loan Notes upon consummation of the Rights Offering,  and up to
     1,650,000 Common Shares issuable upon conversion of Series B Preferred
     Stock being offered  hereby  (assuming full  subscription)  or 888,921
     Common Shares  (assuming  minimum  subscription).  See "DESCRIPTION OF
     CAPITAL STOCK,"  "MANAGEMENT" and "CERTAIN  RELATIONSHIPS  AND RELATED
     TRANSACTIONS."

(2)  Assumes  conversion of the Bridge Loan Notes upon  consummation of the
     Rights  Offering  resulting in net proceeds to the Company of at least
     $1.75 million.

(3)  Assuming full  subscription.  Assuming  minimum  subscription,  26,937
     shares of Series B Preferred Stock will be outstanding.

(4)  Assuming full subscription of the Rights Offering at a price of $74.25
     per Right, after deducting  Soliciting Fees and expenses of the Rights
     Offering  payable  by the  Company  estimated  at  $600,000.  Assuming
     minimum  subscription  using  the  foregoing  assumptions,   net  cash
     proceeds would be approximately $1.4 million.

                                RISK FACTORS

     An investment in the Securities  offered hereby involves a high degree
of risk and should only be made by investors who can afford a loss of their
entire  investment.  Prospective  investors  should  carefully  review  and
consider the information set forth under the caption "Risk Factors."

                      SUMMARY SELECTED FINANCIAL DATA

     The following  summary  selected  financial  data for each of the five
years  ended  December  31,  1997 and for the period  from  January 1, 1992
through December 31, 1997 are derived from the audited financial statements
of the Company.  The summary  selected  financial  data for the three month
periods ended March 31, 1997 and 1998 are derived from unaudited  financial
statements.  The unaudited  financial  statements  include all adjustments,
consisting  of  normal  recurring  accruals,  which the  Company  considers
necessary for a fair presentation of the financial position and the results
of operations  for these  periods.  Operating  results for the three months
ended March 31, 1998 are not necessarily indicative of the results that may
be expected  for the entire  year ending  December  31,  1998.  The summary
selected  financial data should be read in conjunction  with  "Management's
Discussion  and Analysis of Financial  Condition and Results of Operations"
and the financial statements and notes thereto appearing elsewhere herein.

     The Company was  incorporated  on January 19, 1994,  as a wholly owned
subsidiary of Fuel Tech.  Predecessor  financial information included below
for the period from January 1, 1992, through January 18, 1994, reflects the
Company's operations prior to incorporation, at which time it was accounted
for as part of Fuel Tech.  Effective December 12, 1995, Fuel Tech completed
a Rights Offering of the Company's Common Shares,  with Fuel Tech retaining
a 27.6% ownership  interest in the Company (which as of March 31, 1998, has
declined to a 27.4%  interest  after giving effect to the exercise of stock
options).  The Company is a development-stage  enterprise,  and its efforts
from  January  1,  1992,  to the  present  time  have been  devoted  to the
research,  development  and  commercialization  of PFCs  and NOx  reduction
technologies  to  reduce  emissions  from  diesel  engines.  There  were no
material  activities  related to the  Company's  business  in 1990 or 1991.
Prior  to  1990,  the  activities  of  Fuel  Tech  were  focused  on  other
applications  of PFCs  that  are  unrelated  to the  Company's  present  or
contemplated  business and were not material to the overall  development of
the Company's products.  Therefore,  such costs have been excluded from the
determination  of the  Company's  development  costs  and from the  summary
selected financial data set forth below.

<TABLE>
<CAPTION>
                                                                                                    Period
                                                                          Period                     from
                                                                           from                    January 1,
                                            Year Ended                   January 1,  Three Months    1992,
                                           December 31,                    1992         Ended       through
                                                                          through     March 31, 
                                                                          December                  March 31,
                             1993     1994     1995     1996     1997     31, 1997  1997     1998     1998
                             ----     ----     ----     ----     ----     --------  ----     ----     ----
STATEMENT OF                                 (IN THOUSANDS, EXCEPT PER SHARE DATA)
 OPERATIONS DATA:
<S>                          <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>       <C>  
Sales...................     $  --    $  --    $  --    $  --    $ 199    $ 199    $   40   $   --    $ 199
Operating expenses......       131    1,106    1,958    3,812    4,084    11,429    1,051      743    12,172
Net loss during
   development stage....       131    1,107    2,024    3,489    3,764    10,853      961      741    11,594
Basic and diluted loss
   per Common Share.....       N/A    $0.44   $ 0.81    $1.40    $1.50     N/A     $ 0.38   $ 0.29      N/A
Weighted-average shares
   outstanding..........       N/A    2,500    2,500    2,500    2,517     N/A      2,512    2,517      N/A
Ratio of earnings to
   combined fixed charges
   and preferred
   dividends (FN1)......        --       --       --       --       --       --        --       --       --
Cash dividends declared.        --       --       --       --       --       --        --       --       --

</TABLE>

<TABLE>
<CAPTION>
                                                                                     March 31, 1998
                                                                          ----------------------------------
                                                                                  As Adjusted   As Adjusted
                                                December 31,                       Assuming      Assuming
                                                                                      Full        Minimum
                                                                                  Subscription  Subscription
                             1993     1994     1995     1996      1997    Actual      (FN2)         (FN2)
                             ----     ----     ----     ----      ----    ------  ------------  ------------
BALANCE SHEET DATA:                                          (IN THOUSANDS)
<S>                          <C>      <C>      <C>      <C>      <C>       <C>         <C>           <C>   
Current assets..........     $ --     $ 513    $8,882   $5,595   $1,682    $  982      $5,494        $3,782
Total assets............       --       513     8,882    5,677    1,750     1,044       5,556         3,844
Working capital
   (deficit)............       --      (857)    8,395    4,109      788        53       4,565         2,853
Long-term debt..........       --        --       745       --      395       395         395           395
Series A Redeemable
   Preferred Stock......       --        --        --       --       --        --       1,400            --
Shareholders' equity
   (deficiency).........       --      (857)   7,650     4,191      461      (280)      2,832         1,120

<FN>

(1)  For the years ended December 31, 1993,  1994,  1995, 1996 and 1997 and
     for the period from January 1, 1992 through  December 31, 1997 and for
     the three  month  periods  ended  March 31,  1997 and 1998 and for the
     period from January 1, 1992  through  March 31,  1998,  the  Company's
     earnings were inadequate to cover fixed charges by  approximately  (in
     thousands) $131; $1,107; $2,024; $3,489; $3,764;  $10,853; $961; $741;
     and $11,594, respectively. On a pro forma basis, for the periods ended
     December 31, 1997 and March 31, 1998,  the  Company's  earnings  would
     have been  inadequate  to cover  combined  fixed charges and preferred
     stock  dividends  by (in  thousands)  $4,326  and $882  asumming  full
     subscription  and  that the  Series A  Preferred  Stock  and  Series B
     Preferred  Stock were  outstanding as of the beginning of such periods
     and $4,124 and $831 assuming minimum  subscription and that the Bridge
     Loan Notes and Series B  Preferred  Stock were  outstanding  as of the
     beginning of such periods, respectively.

(2)  Adjusted to reflect the  receipt by the Company of the  estimated  net
     proceeds from the sale of the Securities offered hereby, assuming full
     subscription  or  minimum  subscription,  as the case  may be,  of the
     Rights  Offering  at a price  of  $74.25  per  Offering  Share,  after
     deducting  Soliciting Fees and expenses of the Rights Offering payable
     by the Company estimated at $600,000, receipt of the proceeds from the
     Bridge Loan Notes and,  assuming full  subscription  and conversion of
     the Bridge Loan Notes into Series A Convertible Preferred Stock.


</FN>
</TABLE>

                                RISK FACTORS

     This Prospectus contains forward-looking statements within the meaning
of Section 27A of the Securities  Act of 1933, as amended (the  "Securities
Act"). Discussion containing such forward-looking  statements will be found
in the material set forth under "Prospectus  Summary," "Risk Factors," "Use
of Proceeds,"  "Management's Discussion and Analysis of Financial Condition
and Results of Operations" and "Business," as well as within the Prospectus
generally.  Actual results could differ  materially from those projected in
the  forward-looking  statements  as a result of the risk factors set forth
below and the matters set forth in this Prospectus  generally.  The Company
cautions  the  reader,  however,  that  this  list  of  factors  may not be
exhaustive.  The following risk factors  should be considered  carefully in
addition  to the other  information  contained  in this  Prospectus  before
purchasing the Securities offered hereby.

FACTORS RELATING TO THE COMPANY

INDEPENDENT AUDITOR'S REPORT

     The report of the Company's  independent  auditors with respect to the
financial  statements  of the Company for the year ended  December 31, 1997
contains an explanatory  paragraph as to the Company's  ability to continue
as a going  concern.  Among the  factors  cited by the  auditors as raising
substantial  doubt  as to the  Company's  ability  to  continue  as a going
concern is that, with respect to the periods covered,  the Company incurred
recurring  operating losses and its operations have not produced a positive
cash flow. See "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF  OPERATIONS",  and the financial  statements of the Company,
the notes thereto and the Report of Independent Auditors included therein.

LIQUIDITY AND CAPITAL REQUIREMENTS

     At the  date of this  prospectus,  the  Company  has  cash  resources,
including  the $1.4  million  Bridge Loan from Fuel Tech and certain  other
lenders,  estimated to be sufficient  for its needs through  November 1998.
The Company is actively seeking additional  financing of approximately $1.4
million to $3.1 million (net of estimated Subscription Fees and expenses of
the offering of $600,000) through the Rights Offering. Although the Company
believes that it will be successful in its capital raising  efforts,  there
is no  guarantee  that the  Company  will be able to raise such  capital on
terms  satisfactory to the Company.  Accordingly,  at March 31, 1998, there
continues to be substantial  doubt as to the Company's  ability to continue
as a going concern. See "MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION  AND  RESULTS  OF  OPERATIONS,"  and the  Report  of  Independent
Auditors and the related  financial  statements and the notes thereto as of
December  31,  1996 and 1997 and for each of the three  years in the period
ended  December  31, 1997 and for the period from  January 1, 1992  through
December 31, 1997 (the "Annual  Financial  Statements")  and the  financial
statements  and the note thereto as of March 31, 1997 and 1998 and for each
of the three  months  ended March 31, 1997 and 1998 and for the period from
January  1,  1992   through   March  31,  1998  (the   "Interim   Financial
Statements").

CONTINUING OPERATING LOSSES

     The Company has had minimal  revenues  through March 31, 1998. Even if
the  Company   consummates  the  Rights  Offering  and/or  other  financing
alternative, the Company expects to incur operating losses through at least
the first half of 1999.  There can be no  assurance  that the Company  will
achieve or sustain significant revenues or profitability in the future. See
"MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS."

COMPETITION

     Competition  in the diesel fuel  additive  market will come from large
additive suppliers.  The Company is not currently in competition with other
fuel additive manufacturers.  When active marketing of the Company's PFC is
in  progress,  the  Company  anticipates  competing  on the basis of price,
proprietary  technology,  effectiveness  and  ease  of use of the  PFC  and
efficiency of distribution. To the Company's knowledge, it does not compete
against any major gasoline  companies in the PFC market.  While the Company
intends to seek collaborative  arrangements with additive suppliers and oil
companies,   there  are  no  assurances  that  these  arrangements  can  be
negotiated.  Competition  may also come from  alternative  fuels  including
methanol and natural gas, as well as from new engine technology.

NO ASSURANCES OF ADDITIONAL FUNDING

     Based on the Company's  operating plan,  management  believes that the
proceeds from the Rights Offering,  together with the net proceeds received
in connection  with the $1.4 million Bridge Loan effected in 1998,  will be
sufficient  to meet the  Company's  anticipated  cash needs and finance its
operations  through January 2000  (assuming full  subscription) and through
April 1999 (assuming minimum  subscription),  although no assurances can be
given in this  regard.  Thereafter,  the  Company  anticipates  that it may
require  additional  funding in the form of a public or private offering of
the Company's  securities.  Any offering of the Company's equity securities
may result in immediate and significant dilution to the shareholders of the
Company.  The ability of the Company to consummate a public  offering or to
obtain  other  financing  will  depend  on  the  status  of  the  Company's
commercial  efforts and  marketing  programs and field  trials,  as well as
conditions then prevailing in the relevant capital markets. There can be no
assurance  that such  funding  will be  available  when  needed or on terms
acceptable  to the Company.  If the Company is unable to obtain  sufficient
additional  financing,  its ability to meet its current plans for expansion
will be materially adversely affected,  and the Company will not be able to
continue as a going concern.  See "MANAGEMENT'S  DISCUSSION AND ANALYSIS OF
FINANCIAL   CONDITION  AND  RESULTS  OF  OPERATIONS"   and  the  Report  of
Independent Auditors in the Annual Financial Statements.

LIMITED MARKETING EXPERIENCE

     To date,  the  Company  has had limited  experience  and has  expended
limited efforts in marketing its products.  The Company intends to sell its
PFCs to additive companies, oil companies, oil distributors and fleets. The
Company  intends  to sell  its  ARIS(TM)  2000  system  to  catalyst-system
suppliers  or  engine  companies.  While  the  Company  is  now  in  active
discussions  with third  parties to achieve  this and  believes  it will be
successful,  there can be no assurance  that the Company will  successfully
implement its plans.

RELATIONSHIP WITH FUEL TECH; CONFLICTS OF INTEREST

     Directors and officers of Fuel Tech and its  subsidiaries who are also
directors  and  officers  of the  Company,  and Fuel Tech as the  Company's
largest  shareholder,   are  in  positions  involving  the  possibility  of
conflicts of interest with respect to transactions  concerning the Company.
The  Company   currently  has  one  independent   director.   See  "CERTAIN
RELATIONSHIPS AND RELATED TRANSACTIONS."

DEPENDENCE UPON THIRD PARTY TECHNOLOGY

     While the PFCs may be used  alone  for  moderate  levels  of  emission
control,  it is expected  that the product  will be  integrated  into other
systems using third party  technology to achieve  higher levels of control.
The  adoption  of the  use of  PFCs  in such  systems  will  depend  on the
effectiveness  of third party  technology,  the ability of third parties to
market their  products,  and the  compatibility  of the PFC and NOx control
products with their  systems.  Failure of these third party systems to gain
market  acceptance or failure of the PFCs and NOx control products to prove
compatible  and  effective  with third party  systems could have an adverse
effect  on  the  Company's   business,   operating  results  and  financial
condition. See "BUSINESS -- Products and Markets."

UNCERTAINTY OF MARKET ACCEPTANCE

     The  commercial  success of the  Company's  products  will depend upon
acceptance by the fuel additive, oil and engine industries,  and acceptance
by  governmental  regulatory  bodies.  This market  acceptance will in turn
depend  upon  competitive   developments  and  the  Company's   ability  to
demonstrate the efficacy, cost-effectiveness, safety and ease of use of the
PFC and NOx control products of the Company.  The failure by the Company to
receive market  acceptance for the PFC and NOx control  products would have
an  adverse  effect  on  the  Company's  business,  operating  results  and
financial condition. See "BUSINESS -- Products and Markets."

NO ASSURANCE OF NECESSARY REGULATORY APPROVALS

     The Company's  products and  manufacturing  activities  are subject to
governmental regulation, principally by the Environmental Protection Agency
("EPA") and corresponding  foreign and state agencies.  The EPA administers
the Clean Air Act  Amendments of 1990  ("CAAA").  The Company is subject to
the  standards  and  procedures  contained in such act and the  regulations
promulgated  thereunder,  as  well as  similar  standards,  procedures  and
regulations  of  international  regulatory  authorities,  and is subject to
inspection by the EPA and other regulatory  bodies for compliance with such
standards,  procedures  and  regulations.  Failure to  receive  appropriate
approvals or to comply with the EPA and similar foreign  regulations  could
result  in  civil  monetary  or  criminal  sanctions,  restrictions  on  or
injunction against marketing of the Company's products,  as well as seizure
or  recall of the  Company's  products  or other  regulatory  actions.  The
Company  received  registration  for its PFC  from the EPA to be used as an
aftermarket treatment for individual vehicles and in bulk fuel supplies for
diesel.  The Company has  received  registration  status under the EPA fuel
additive  regulations for three  additional PFCs with the original PFC. The
Company has received  consent  from the U.K.  Ministry of Health for use of
the PFC in diesel fuel.  See "BUSINESS -- Regulations -- USA" and "BUSINESS
- -- Regulations -- International."

     The Company has registered  the cerium  products and is in the process
of registering  platinum/cerium  bimetallic  products.  The Company will be
required to register  the  gasoline  product and apply for a waiver  before
this  product can be marketed in the U.S.  There can be no  assurance  that
such registrations will be obtained.

NO ASSURANCE OF PROTECTION OF PATENTS AND PROPRIETARY RIGHTS

     The  Company  holds  licenses  to a number of  patents  and has patent
applications  pending.  There  can  be no  assurance  that  pending  patent
applications  will be  approved  or that  the  issued  patents  or  pending
applications will not be challenged or circumvented by competitors. Certain
critical technology  incorporated in the Company's products is protected by
trademark  and  trade  secret  laws  and   confidentiality   and  licensing
agreements.  There can be no  assurance  that such  protection  will  prove
adequate or that the Company will have adequate  remedies for disclosure of
its trade secrets or violations of its intellectual  property  rights.  See
"BUSINESS -- Protection of Proprietary Information."

RAW MATERIAL PRICE VOLATILITY

     The cost of raw  materials,  including  platinum,  rhodium and cerium,
will have a direct impact on the future  pricing and  profitability  of the
Company's  products.  Although  the Company  intends to minimize  this risk
through  various  purchasing  and  hedging  strategies,  there  can  be  no
assurance that the Company will be able to do so. A significant increase in
the price of these  materials  could have a material  adverse effect on the
Company's business, operating results and financial condition.

DEPENDENCE ON ATTRACTING AND RETAINING PERSONNEL

     The  success  of the  Company  will  depend,  in  large  part,  on the
Company's  ability to (i) retain  current key  personnel,  (ii) attract and
retain  qualified  sales and  marketing  personnel  and (iii)  develop  and
maintain   relationships  with  research  institutions  and  other  outside
consultants.  The loss of key personnel, or the inability of the Company to
hire or retain qualified personnel or the failure to assimilate effectively
such  personnel  could  have a  material  adverse  effect on the  Company's
business,  operating  results and  financial  condition.  See  "BUSINESS --
Employees."

FOREIGN CURRENCY RISK

     To date, sales,  marketing and testing of the Company's PFCs have been
limited  principally to Europe.  While the Company has not  experienced any
significant  foreign  currency  exposure  with respect to such  activities,
there can be no assurance  that exposure to currency  fluctuation  will not
have a significant  effect on the Company's  operations in the future.  The
Company  intends to manage the risk to such  exposure,  if any, by entering
into foreign currency futures and option contracts.

FACTORS RELATING TO THE SECURITIES

POSSIBLE ADVERSE FUTURE  ACCOUNTING  EFFECT ON EARNINGS PER SHARE ALLOCABLE
TO COMMON SHARES

     If, on issuance of the Series B Preferred  Stock,  its $____ per share
stated  value is less than the  then-current  market price of the 33 Common
Shares into which it is  convertible,  the excess of that market price over
$_____  multiplied  by the  number of shares  of Series B  Preferred  Stock
issued (the "Aggregate  Discount") will be treated under  accounting  rules
applicable  to the Company as analogous  to a dividend  with respect to the
Series B Preferred Stock. For accounting  purposes,  the Aggregate Discount
will increase the loss attributable to Common  Shareholders for purposes of
computation  of basic loss per share and may affect  the  diluted  loss per
share  computation  in the  fiscal  quarter  and year in which  the  Rights
Offering is completed.  The Company  cannot predict the market price of the
Common Shares on the date of issuance of the Series B Preferred  Stock, and
therefore it cannot now estimate  whether an Aggregate  Discount will exist
or, if it does exist, the amount of the Aggregate  Discount with respect to
any assumed  number of shares of Series B  Preferred  Stock to be issued in
the Transaction.

     Solely as an example of the accounting  effect,  assuming that (1) the
stated  value per Series B  Preferred  Stock was $74.25,  (2) the  reported
closing  price of Common  Shares at the time of  issuance  of the  Series B
Preferred Stock was $2.50 and (3) 50,000 shares of Series B Preferred Stock
were issued in the Transaction,  the Aggregate  Discount would be $412,500.
This  Aggregate  Discount would increase the annual basic loss per share by
$.16 per share (based upon 2,516,666  shares of the Company's  Common Stock
outstanding at March 31, 1998).

ACCOUNTING  CONSEQUENCES  PERTAINING  TO SERIES A CONVERTIBLE  PREFERRED
STOCK AND SERIES B CONVERTIBLE PREFERRED STOCK

     Upon completion of the Rights  Offering,  the Series B Preferred Stock
will  initially  be  reflected in the  Company's  balance  sheet net of the
Soliciting  Fees and  expenses  of the  Rights  Offering  (estimated  to be
$600,000). Pursuant to applicable accounting rules and SEC regulations, the
Company will be required to accrete the carrying value of such stock to its
liquidation  value. Such accretion will be recognized over a period of five
years.  The  carrying  amount of such stock  shall be further  periodically
increased  by  amounts  representing  dividends  earned  but not paid.  The
aforementioned increases in carrying amount will decrease retained earnings
and will increase the loss per share attributable to common shareholders.

     Pursuant to applicable accounting  standards,  any dividends which are
paid in kind on the Series A  Preferred  Stock or on the Series B Preferred
Stock,  will be recorded in the  Company's  balance sheet as an increase to
the accumulated deficit or reduction in retained earnings,  as the case may
be, and an  increase  in the  carrying  value of such  stock.  Accordingly,
dividends  that  are  paid  in  kind  will  increase  the  loss  per  share
attributable to common  shareholders and will result in additional dilution
of ownership interest attributable to existing common shareholders.

TAX  CONSEQUENCES  TO  SHAREHOLDERS ON SALE OF RIGHTS OR SERIES B PREFERRED
STOCK

     The Company believes that the Rights Offering will result in a taxable
distribution  to  recipients  of  Rights.  However,  in  the  event  it  is
determined   that  the   distribution   of  the  Rights  is  a  non-taxable
distribution,  sale of the Rights and the Series B  Preferred  Stock may be
subject to certain restrictions.  See "CERTAIN UNITED STATES FEDERAL INCOME
TAX   CONSEQUENCES  TO  HOLDERS."  If  the  Rights  or  stock  acquired  is
characterized,  for federal income tax purposes, as being "stock other than
common  stock,"  then the  amount  realized  from the sale of such stock or
Rights may, in whole or in part, be treated as ordinary income. The Company
believes  that,  because the  conversion  rights  granted to holders of the
Series B Preferred Stock provide the  unrestricted  right to participate in
future corporate growth,  the Rights,  the Series B Preferred Stock and the
Common Shares  received as a result of conversion of the Series B Preferred
Stock  should be treated as common  stock for these  purposes.  There is no
clear  statutory  definition  of the term "stock  other than common  stock"
however, and it is possible for the Internal Revenue Service (the "IRS") to
challenge this position.

     Even if the Rights or the Series B Preferred  Stock are  classified as
"stock other than common  stock,"  there are several  methods  available to
shareholders  to avoid  the  adverse  tax  consequences  arising  from this
designation.  Ordinary  income  treatment  will not  apply on sale or other
disposition of the Rights or the Series B Preferred  Stock: (i) if the sale
terminates  the entire stock  interest of the  shareholder  in the Company;
(ii) if the Series B Preferred  Stock is converted to Common Shares and the
sale is of the Common Shares;  (iii) in transactions  where gain or loss to
the shareholder is not  recognized;  or (iv) where it is established to the
satisfaction  of the Secretary of the Treasury that the  transactions  were
not in  pursuance  of a plan  having  one of  its  principal  purposes  the
avoidance  of federal  income tax. If the Rights and the Series B Preferred
Stock are not treated as "stock other than common  stock," or if one of the
above  exceptions  apply,  then a  shareholder  who sells the Rights or the
Series  B  Preferred  Stock  will  recognize  gain  or  loss  equal  to the
difference between the sale proceeds and such shareholder's  basis (if any)
in the Rights or the Series B Preferred  Stock sold. Such gain or loss will
generally be capital gain or loss,  long or short-term,  depending upon the
holding  period for the security sold. For tax years ending after 1997, the
Internal  Revenue Service  Restructuring  and Reform Bill of 1998 generally
provides for a twelve month  holding  period for  qualification  of capital
gains as long-term.

DELISTING FROM NASDAQ

     Effective July 1, 1998, the Company's Common Shares were delisted from
Nasdaq  for  failing  to  meet  Nasdaq's  new  net  tangible   asset/market
capitalization/net  income  requirement.  As a result, the Company's Common
Shares  currently trade on the OTC Electronic  Bulletin Board,  although no
assurance  can be given that such shares will  continue to trade thereon or
that they will trade in the  over-the-counter  market, in what are commonly
referred to as the "pink sheets." Nasdaq's listing requirements have become
more stringent since the Company's  original  listing in December 1995, and
there can be no  assurance  that the  Company  will be able to  relist  its
Common Shares on Nasdaq.

POSSIBLE ADVERSE EFFECT OF PENNY STOCK  REGULATIONS ON THE LIQUIDITY OF THE
COMPANY'S SECURITIES

     In the absence of the Common  Shares being quoted on Nasdaq and for so
long as the Common  Shares  continue to trade at market  prices below $5.00
per share (see "PRICE RANGE OF COMMON  SHARES"),  the Common Shares will be
deemed to be "penny stock" under the Exchange Act. Accordingly,  trading in
the Common Shares is covered by Rule 15g-9  promulgated  under the Exchange
Act.  Under such rule,  broker-dealers  who  recommend  such  securities to
persons other than established customers and accredited investors must make
a special written  suitability  determination for the purchaser and receive
the purchaser's written agreement to a transaction prior to sale.

     The Commission adopted regulations that generally define a penny stock
to be any equity  security  that has a market  price of less than $5.00 per
share,  subject to certain  exceptions.  Such exceptions  include an equity
security listed on Nasdaq,  and an equity security issued by an issuer that
has (i) net tangible assets of at least $2,000,000, if such issuer has been
in  continuous  operation for three years,  (ii) net tangible  assets of at
least $5,000,000,  if such issuer has been in continuous operation for less
than three years, or (iii) average  revenue of at least  $6,000,000 for the
preceding  three years.  Unless an exception is available,  the regulations
require the delivery,  prior to any transaction involving a penny stock, of
a  disclosure  schedule  explaining  the penny  stock  market and the risks
associated therewith.

     For so  long as the  Common  Shares  are  subject  to the  regulations
applicable to penny stocks, the market liquidity for the Common Shares will
be severely  affected,  limiting the ability of  broker-dealers to sell the
Common  Shares and the ability of purchasers in this Offering to sell their
Common Shares in the secondary  market.  There is no assurance that trading
in the  Common  Shares  will not  continue  to be subject to these or other
regulations that would adversely affect the market for such securities.

UNCERTAIN MARKET FOR THE RIGHTS AND THE SERIES B PREFERRED STOCK

     The Series B  Preferred  Stock and the  Rights  will not be listed for
trading.  There  can be no  assurance  that a market  for the  Rights  will
develop prior to their  Expiration  Date; nor can there be assurance that a
market for the Series B Preferred Stock will develop.  If a market develops
for the Rights or the Series B Preferred Stock, there is no assurance as to
the price at which the Rights or Series B Preferred  Stock will trade.  Any
market that may develop may be volatile and unreliable.

     Following the Expiration Date, a subscribing  Holder may or may not be
able to sell shares of Series B  Preferred  Stock  purchased  in the Rights
Offering at a price equal to or greater than the Subscription  Price. There
can also be no assurance that the Common Shares issuable upon conversion of
the Series B Preferred Stock will trade at or above the Subscription Price.
When  made,  the  election  of a Holder to  exercise  Rights in the  Rights
Offering  is  irrevocable.  Moreover,  until  certificates  are  delivered,
subscribing  Holders may not be able to sell the Series B  Preferred  Stock
that they have purchased in the Rights Offering.

     As described herein,  the Series B Preferred Stock is convertible into
Common Shares which currently  trade on the OTC Electronic  Bulletin Board,
although no assurances can be given that such shares will continue to trade
thereon or in the over-the-counter market, in what are commonly referred to
as the "pink sheets." See "-- Delisting from Nasdaq" above.

POSSIBLE VOLATILITY OF STOCK PRICE; LOW TRADING VOLUME

     There has been significant volatility in the market prices of publicly
traded  shares of  emerging  growth  technology  companies,  including  the
Company's  Common  Shares.  Factors  such  as  announcements  of  technical
developments, establishment of strategic alliances, changes in governmental
regulation  and  developments  in patent or  proprietary  rights may have a
significant  effect on the market  price of the  Company's  securities.  In
addition,  there has been insignificant average daily trading volume of the
Company's  Common  Shares  (including  days  during  which no  trades  were
consummated)  since public trading of the Common Shares  commenced.  To the
extent this trading pattern  continues,  the price of the Common Shares may
fluctuate  significantly  as a result of relatively minor changes in demand
for such shares and sales of stock by Holders.

DILUTION

     Holders who do not exercise their Rights will experience a significant
decrease in their proportionate interest in the equity ownership and voting
power  of the  Company.  The  sale  of the  Rights  may  not  compensate  a
shareholder  for all or any part of any  reduction  in the market  value of
such  shareholder's  Common  Shares  resulting  from the  Rights  Offering.
Holders who do not exercise or sell their Rights will  relinquish any value
inherent  in  the  Rights.  As  described  herein,   Rights  will  only  be
distributed to, and may only be exercised by, Holders  residing outside the
United States and in certain states.

     After giving  effect to the exercise of the Rights and the  subsequent
conversion of the Series B Preferred Stock  (assuming full  subscription of
the Rights and not including the conversion of the Series A Preferred Stock
and  outstanding  stock  options  and  warrants),  the  Company  will  have
approximately  4,166,666  Common Shares issued and  outstanding  (3,405,587
assuming minimum subscription).

     Purchasers of Series B Preferred Stock will  experience  immediate and
substantial  dilution in the net tangible book value per share attributable
to  the  Common  Shares  underlying  the  Series  B  Preferred  Stock.  See
"DILUTION."

NO  DIVIDENDS  ON COMMON  SHARES,  SERIES A  PREFERRED  STOCK AND  SERIES B
PREFERRED STOCK

     The  Company has not paid  dividends  on its Common  Shares  since its
inception and does not intend to pay any dividends to its Holders of Common
Shares in the foreseeable future.

     Holders of the Series A Preferred  Stock and Series B Preferred  Stock
are entitled to receive, when, as and if declared by the Board out of funds
of the Company  legally  available  therefor,  cash dividends at the annual
rate of 9% of the $500  stated  value  and  liquidation  preference  of the
Series A Preferred  Stock price per share and 9% of the $_____ stated value
and liquidation preference of the Series B Preferred Stock price per share;
provided,  however,  that in lieu of making  dividends in cash, the Company
may  elect,  by  giving  written  notice  to each  holder  of the  Series A
Preferred  Stock and Series B Preferred  Stock, to pay dividends in kind at
the annual rate of 11% of the  Liquidation  Preference  (cash dividends and
dividends in kind are each deemed "Preferred Dividends"). Dividends payable
to the holders of the Series A Preferred Stock and Series B Preferred Stock
are payable  quarterly  in arrears,  on the first  business day of January,
April,  July and  October of each year  (each  such date being  hereinafter
referred  to as a  "Dividend  Payment  Date"),  commencing  July  1,  1998.
Preferred  Dividends  on shares of Series A  Preferred  Stock and  Series B
Preferred  Stock  shall be  cumulative  and shall  accrue  from the date of
original  issuance.  It is presently  anticipated that the Company will pay
dividends on shares of the Series A Preferred  Stock and Series B Preferred
Stock in  shares  of  Series A  Preferred  Stock  and  shares  of  Series B
Preferred  Stock,  respectively,  and any  earnings  which the  Company may
realize  in  the  foreseeable  future  will  be  retained  to  finance  the
development and expansion of the Company. See "DIVIDEND POLICY."

     Pursuant to applicable accounting  standards,  any dividends which are
paid in kind on the Series A  Preferred  Stock or on the Series B Preferred
Stock,  will be recorded in the  Company's  balance sheet as an increase to
the accumulated deficit or reduction in retained earnings,  as the case may
be, and an  increase  in the  carrying  value of such  stock.  Accordingly,
dividends  that  are  paid  in  kind  will  increase  the  loss  per  share
attributable to Common  Shareholders and will result in additional dilution
of ownership interest attributable to existing Common Shareholders.

FUTURE SALES OF COMMON SHARES

     The sale, or availability  for sale, of substantial  amounts of Common
Shares in the public market  subsequent  to this Offering  pursuant to Rule
144 under the Securities Act or otherwise could adversely affect the market
price of the Common Shares and could impair the Company's  ability to raise
additional  capital  through  the  sale of its  equity  securities  or debt
financing.

                            THE RIGHTS OFFERING

THE RIGHTS

     The  Company is issuing to each  Holder of record of Common  Shares on
the Record  Date one  transferable  Right for each 50 Common  Shares  held;
provided,  however, Rights will not be distributed to Holders who reside in
jurisdictions  in which the Securities have not been registered or where an
exemption  from  registration  is not  available,  as described  more fully
below, and transferees of Rights in jurisdictions where the Securities have
not  been  registered  or  where  an  exemption  from  registration  is not
available  may not  exercise  the Rights.  The Rights will be  evidenced by
Rights  Certificates.  An  aggregate  of up to  50,000  Rights  will  be so
distributed.  No  fractional  Rights  or  cash  in  lieu  thereof  will  be
distributed or paid by the Company.  The number of Rights  distributed will
be rounded  down to the nearest  whole  number.  As  described  below under
"Amendment and Termination," the Company will terminate the Rights Offering
if on the Expiration Date the Company  receives  aggregate cash proceeds of
less than $2.0 million from the exercise of Rights (calculated based upon a
per Common Share price of $2.25,  a 12.5%  premium over the average bid and
ask  prices  of such  shares  over the five  most  recent  business  days).
Accordingly,   assuming  a   Subscription   Price  of  $74.25,   a  minimum
subscription  of  approximately  26,937  Offering  Shares  pursuant  to the
exercise of the Rights is necessary to proceed with the Rights Offering.

Expiration Date

     The Rights will expire on ______________ _, 1998, at 5:00 p.m. Eastern
Standard  Time,  thirty days after the effective  date of this  Prospectus,
unless extended by the Board of Directors of the Company, in which case the
term  "Expiration  Date"  shall mean the latest  date and time to which the
Rights Offering is extended.  After the Expiration Date, unexercised Rights
will be null and  void.  The  Company  will not be  obligated  to honor any
purported  exercise of Rights received by the Subscription  Agent after the
Expiration Date, regardless of when the documents relating to that exercise
were sent, except pursuant to the procedures described below.

SUBSCRIPTION PRIVILEGES

     Basic Subscription Privilege

     Each Right will entitle the  registered  Holder thereof to purchase at
the Subscription Price one share of Series B Preferred Stock. Each share of
Series B Preferred Stock will be immediately  convertible at no cost to the
Holder thereof, into 33 Common Shares. Certificates representing Underlying
Shares  purchased  pursuant  to the Basic  Subscription  Privilege  will be
delivered to the  subscribers as soon as  practicable  after the Expiration
Date and  after all  prorations  contemplated  by the  terms of the  Rights
Offering have been effected.

     Oversubscription Privilege

     Each  Holder who  exercises  all of his or her Rights  pursuant to the
Basic  Subscription  Privilege  may  indicate  on  the  Rights  certificate
additional shares of Series B Preferred Stock above the Basic  Subscription
Privilege  up to the Maximum  Offering  Shares  such  Holder  would like to
purchase at the Subscription Price. The  Oversubscription  Privilege is not
transferable.  After the  Expiration  Date,  the  Company  will issue those
Offering Shares not purchased through the Basic  Subscription  Privilege to
the Holders who wish to exercise their  Oversubscription  Privilege.  If an
insufficient  number of Offering  Shares is available to satisfy  fully all
elections to exercise the  Oversubscription  Privilege,  then the available
Offering  Shares  will be  allocated  among the  Holders  exercising  their
Oversubscription  Privilege  such that each such Holder will be entitled to
receive  a number  of  Offering  Shares  which is  equal to the  number  of
Offering   Shares   subscribed   to  by  such   Holder   pursuant   to  the
Oversubscription Privilege multiplied by a fraction, the numerator of which
is the number of the then available  Offering Shares and the denominator of
which is the aggregate number of Offering Shares  subscribed to pursuant to
the  Oversubscription  Privilege.  If a proration  of the  Offering  Shares
results  in a Holder  receiving  fewer  Offering  Shares  than such  Holder
subscribed for pursuant to the Oversubscription  Privilege, then any excess
funds paid by that Holder as the  Subscription  Price for shares not issued
will be returned by the  Subscription  Agent without interest or deduction.
Certificates   representing  Offering  Shares  purchased  pursuant  to  the
Oversubscription  Privilege  will be  delivered to  subscribers  as soon as
practicable  after  the  Expiration  Date  and  after  all  prorations  and
adjustments  contemplated  by the terms of the  Rights  Offering  have been
effected.

SUBSCRIPTION PRICE

     The Subscription Price is $______ per Offering Share. The Subscription
Price is payable in cash or by check, money order or wire transfer,  all as
more  completely  set forth  under "THE  RIGHTS  OFFERING  --  Exercise  of
Rights."

METHOD FOR PRICING

     The terms of the Rights Offering,  including the Subscription Price of
$______,  were  determined by the Board of Directors of the Company.  Among
the factors  considered  in  determining  the  Subscription  Price are: the
recent  market  prices of the  Common  Shares,  the  terms of the  Series B
Preferred   Stock,   including   dividend  and   liquidation   preferences,
anticipated  market and  economic  conditions,  estimates  of the  business
potential  and  prospects  of  the  Company,  the  Company's  status  as  a
development-stage  company, the Company's prior investment in its products,
its future estimated cash requirements to commercialize  its products,  the
risks of the business, and consultation with financial advisors.

EXERCISE OF RIGHTS

     The Basic Subscription  Privilege and the  Oversubscription  Privilege
may be exercised by properly completing the Rights Certificates  evidencing
the Rights and forwarding them, with payment of the Subscription  Price for
each share of Series B Preferred Stock subscribed for pursuant to the Basic
Subscription Privilege and the Oversubscription  Privilege,  to ChaseMellon
Shareholder  Services,   L.L.C.,  the  Subscription  Agent,  prior  to  the
Expiration  Date.  Payment  may  only  be  made  (a) by  check  or  postal,
telegraphic  or express  money order,  payable to  ChaseMellon  Shareholder
Services,  L.L.C., as Subscription  Agent, or (b) by wire transfer of funds
to the  account  maintained  by the  Subscription  Agent for the purpose of
accepting  subscriptions  at ABA No.  021000021,  Chase Manhattan Bank, New
York,  New  York,   Reorganization   No.   323-213057,   for  Clean  Diesel
Technologies,  Inc., Attn: Evelyn O'Connor.  The Subscription Price will be
deemed  to have  been  received  by the  Subscription  Agent  only upon (i)
clearance of any uncertified  check, (ii) receipt by the Subscription Agent
of any certified check or cashier's check or of any postal,  telegraphic or
express  money  order,   or  (iii)  receipt  of  collected   funds  in  the
Subscription  Agent's  account  designated  above. If paying by uncertified
personal  check,  please note that the funds paid thereby may take at least
five (5) business days to clear.  Accordingly,  Holders who wish to pay the
Subscription Price by means of uncertified personal check are urged to make
payment  sufficiently in advance of the Expiration Date to ensure that such
payment is received and clears by such time and are urged to  consider,  in
the alternative,  payment by means of certified or cashier's  check,  money
order or wire  transfer  of funds.  All funds  received  in  payment of the
Subscription  Price shall be held by the Subscription Agent in a segregated
interest bearing account in the name of the Company. If Rights Certificates
are sent by mail, Rights Holders are urged to use insured, registered mail,
return receipt requested.

     If a Holder wishes to exercise  Rights,  but time will not permit such
Holder to cause the Rights  Certificates  evidencing  those Rights to reach
the  Subscription  Agent  prior to the  Expiration  Date,  such  Rights may
nevertheless  be  exercised  if  all  of  the  following   conditions  (the
"Guaranteed Delivery Procedures") are met:

          (i) the  Holder has  caused  payment in full of the  Subscription
     Price for each  Offering  Share being  subscribed  for pursuant to the
     Basic Subscription Privilege and the Oversubscription  Privilege to be
     received  (in the manner set forth  above) by the  Subscription  Agent
     prior to the Expiration Date;

          (ii)  the  Subscription  Agent  receives,  at  or  prior  to  the
     Expiration   Date,  a  guarantee   notice  (a  "Notice  of  Guaranteed
     Delivery"),  substantially  in the form provided with the Instructions
     as to Use of Clean Diesel Technologies,  Inc. Rights Certificates (the
     "Instructions")  distributed  with  the  Rights  Certificates,  from a
     member firm of a registered  national  securities exchange or a member
     of the National Association of Securities Dealers,  Inc. ("NASD"),  or
     from  a  commercial   bank  or  trust  company  having  an  office  or
     correspondent in the United States (each, an "Eligible  Institution"),
     stating  the name of the  exercising  Holder,  the  Number  of  Rights
     represented by the Rights  Certificate held by such Holder, the number
     of  Offering  Shares  being  subscribed  for  pursuant  to  the  Basic
     Subscription  Privilege,  if  any,  pursuant  to the  Oversubscription
     Privilege,  and guaranteeing the delivery to the Subscription Agent of
     the  Rights  Certificates  evidencing  those  Rights  within  five (5)
     trading days following the date of the Notice of Guaranteed  Delivery;
     and

          (iii) the properly completed Rights  Certificates  evidencing the
     Rights being exercised, with any signatures guaranteed as required, is
     received  by the  Subscription  Agent  within  five (5)  trading  days
     following  the date of the  Notice  of  Guaranteed  Delivery  relating
     thereto.  The Notice of  Guaranteed  Delivery  may be delivered to the
     Subscription  Agent in the same manner as Rights  Certificates  at the
     addresses set forth below,  or may be transmitted to the  Subscription
     Agent by telegram or  facsimile  transmission  (telecopier  no.  (201)
     296-4293).  Additional  copies  of the form of  Notice  of  Guaranteed
     Delivery are available upon request from the Subscription Agent at the
     address set forth below.

     If the  aggregate  Subscription  Price  paid by an  exercising  Rights
Holder  is  insufficient  to  purchase  the  number  of  shares of Series B
Preferred Stock that the Holder  indicates are being  subscribed for, or if
an exercising Rights Holder does not specify the number of shares of Series
B Preferred Stock to be purchased, then the Rights Holder will be deemed to
have exercised,  first, the Basic  Subscription  Privilege and, second, the
Oversubscription  Privilege to purchase  shares of Series B Preferred Stock
to the full extent of the payment tendered.  If the aggregate  Subscription
Price paid by an exercising  Rights Holder exceeds the amount  necessary to
purchase  the  number of shares of Series B  Preferred  Stock for which the
Rights  Holder has  indicated an intention  to  subscribe,  then the Rights
Holder  will be deemed to have  exercised,  first,  the Basic  Subscription
Privilege   (if   not   already   fully   exercised)   and,   second,   the
Oversubscription  Privilege  to  the  full  extent  of the  excess  payment
tendered.  Once a  Rights  Holder  has  exercised  the  Basic  Subscription
Privilege  or the  Oversubscription  Privilege,  such  exercise  may not be
revoked.  Any Rights not duly exercised  prior to the Expiration  Date will
expire and become worthless.

     Funds received in payment pursuant to the  Oversubscription  Privilege
will be held in a  segregated  account  pending  issuance  of the  Offering
Shares.

     Record  Holders  of  Common  Shares  such  as  brokers,   trustees  or
depositories  for  securities,  who hold  shares for the account of others,
should contact the respective  beneficial  owners of such shares as soon as
possible  to  ascertain  the  beneficial   owners'   intentions  to  obtain
instructions  with  respect  to  the  Rights.  If  a  beneficial  owner  so
instructs,  the record owner of Common Shares should  complete  appropriate
Rights  Certificates  and submit  them to the  Subscription  Agent with the
proper payment. The Company shall pay broker-dealers Soliciting Fees of ten
percent of the Subscription  Price paid for each Right which is subscribed;
provided that such fees will only be paid in respect of Rights exercised in
those  jurisdictions  described under "PLAN OF DISTRIBUTION -- Distribution
Arrangements." See "PLAN OF DISTRIBUTION." Additionally,  beneficial owners
of Common  Shares or  Rights  held  through  such a nominee  Holder  should
contact  the  nominee  Holder  and  request  the  nominee  Holder to effect
transactions in accordance with the beneficial owner's instructions.

     The Instructions  accompanying the Rights  Certificates should be read
carefully and followed in detail.  RIGHTS  CERTIFICATES SHOULD BE SENT WITH
PAYMENT TO THE SUBSCRIPTION  AGENT. DO NOT SEND RIGHTS  CERTIFICATES TO THE
COMPANY.

     THE  METHOD OF  DELIVERY  OF RIGHTS  CERTIFICATES  AND  PAYMENT OF THE
SUBSCRIPTION  PRICE TO THE  SUBSCRIPTION  AGENT WILL BE AT THE ELECTION AND
RISK OF THE RIGHTS  HOLDERS.  IF SENT BY MAIL,  RIGHTS HOLDERS ARE URGED TO
SEND RIGHTS CERTIFICATES AND PAYMENTS BY REGISTERED MAIL, PROPERLY INSURED,
WITH RETURN RECEIPT  REQUESTED,  AND ARE URGED TO ALLOW A SUFFICIENT NUMBER
OF DAYS TO ENSURE  DELIVERY  TO THE  SUBSCRIPTION  AGENT AND  CLEARANCE  OF
PAYMENT PRIOR TO THE EXPIRATION DATE. BECAUSE  UNCERTIFIED  PERSONAL CHECKS
MAY TAKE AT LEAST FIVE BUSINESS DAYS TO CLEAR,  RIGHTS HOLDERS ARE STRONGLY
URGED TO PAY, OR ARRANGE FOR  PAYMENT,  BY MEANS OF  CERTIFIED OR CASHIER'S
CHECK, MONEY ORDER OR WIRE TRANSFER OF FUNDS.

     All  questions   concerning  the   timeliness,   validity,   form  and
eligibility  of any exercise of Rights will be  determined  by the Company,
whose  determinations  will be final and binding.  The Company, in its sole
discretion,  may waive any  defect or  irregularity,  or permit a defect or
irregularity  to be  corrected  within  such time as it may  determine,  or
reject the purported exercise of any Right. Rights Certificates will not be
deemed to have been received or accepted until all irregularities have been
waived or cured  within  such time as the Company  determines,  in its sole
discretion.  Neither the Company nor the  Subscription  Agent will be under
any duty to give  notification  of any defect or irregularity in connection
with the  submission  of  Subscription  Rights or incur any  liability  for
failure to give such notification.

     ANY  QUESTIONS OR REQUESTS  FOR  ASSISTANCE  CONCERNING  THE METHOD OF
EXERCISING  RIGHTS OR REQUESTS  FOR  ADDITIONAL  COPIES OF THIS  PROSPECTUS
SHOULD BE  DIRECTED  TO  CHASEMELLON  SHAREHOLDER  SERVICES,  L.L.C.  ("THE
INFORMATION  AGENT"),  AT THE ADDRESS  SET FORTH  BELOW UNDER  "INFORMATION
AGENT".

JURISDICTIONS IN WHICH THE SECURITIES ARE OFFERED

     THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION, THE SERIES B PREFERRED  STOCK MAY NOT BE  TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:  ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

NO REVOCATION

     ONCE A HOLDER OF RIGHTS HAS PROPERLY  EXERCISED THE BASIC SUBSCRIPTION
PRIVILEGE AND/OR THE OVERSUBSCRIPTION  PRIVILEGE,  SUCH EXERCISE MAY NOT BE
REVOKED.

AMENDMENT AND TERMINATION

     The Board of  Directors  reserves  the Right to extend the  Expiration
Date and to amend the terms and  conditions  of the  Rights  Offering.  Any
extension, if made, will be publicly announced through a release to the Dow
Jones  News  Service  and  as  otherwise  required  by  applicable  law  or
regulations.  In the event of a material  change in the terms of the Rights
Offering,  there  will  be an  affirmative  resolicitation  of  the  Rights
Offering  by  means  of a  post-effective  amendment  to  the  Registration
Statement. In the event of such a resolicitation,  subscribing Holders will
be deemed to have  effectively  revoked  their  subscriptions  unless  they
affirmatively  confirm  their intent to subscribe,  and their  subscription
payments will be returned to them without interest or deduction.  The Board
of  Directors  of the Company in its sole  discretion,  may  terminate  the
Rights  Offering and revoke the Rights at any time prior to the  Expiration
Date or thereafter.  In any event,  the Company shall  terminate the Rights
Offering if on the  Expiration  Date the Company  receives  aggregate  cash
proceeds of less than $2.0  million  from the  exercise  of Rights.  In the
event of such termination,  the Company will promptly return to all persons
that exercised Rights,  their  subscription  payments,  without interest or
deduction.

METHOD OF TRANSFERRING RIGHTS

     Rights may be  purchased or sold through  usual  investment  channels,
including  banks  and  brokers.  There can be no  assurance  that an active
market will develop for the Rights.  The Rights,  the underlying  shares of
Series B Preferred  Stock and the Common Shares issuable upon conversion of
the Series B Preferred Stock, will not be eligible for trading on Nasdaq.

     The Rights evidenced by a single Rights Certificate may be transferred
in whole by endorsing  the Rights  Certificate  for transfer in  accordance
with the accompanying instructions.  A portion of the Rights evidenced by a
single   Rights   Certificate   (but   not   fractional   Rights   or   the
Oversubscription  Privilege  or  to  persons  in  jurisdictions  where  the
Securities have not been registered or where an exemption from registration
is not  available)  may be  transferred  by delivering to the  Subscription
Agent  a  Rights   Certificate   properly   endorsed  for  transfer,   with
instructions  to register such portion of the Rights  evidenced  thereby in
the name of the  transferee  (and to issue a new Rights  Certificate to the
transferee evidencing such transferred Rights). In such event, a new Rights
Certificate  evidencing  the  balance of the  Rights  will be issued to the
Rights  Holder  or, if the Rights  Holder so  instructs,  to an  additional
transferee. The Oversubscription Privilege is not transferable.

     Holders of Rights wishing to transfer all or a portion of their Rights
(subject to the  limitations  described  above)  should  allow a sufficient
amount  of  time  prior  to  the  Expiration  Date  for  (i)  the  transfer
instructions to be received and processed by the Subscription Agent, (ii) a
new  Rights  Certificate  for  the  transferred  Rights  to be  issued  and
transmitted to the transferee or transferees  and a new Rights  Certificate
for any retained  Rights to be issued and transmitted to the transferor and
(iii) the Rights evidenced by such new Rights  Certificates to be exercised
or sold by the recipients thereof. Neither the Company nor the Subscription
Agent shall have any  liability to a transferee  or transferor of Rights if
Rights  Certificates are not received in time for exercise or sale prior to
the Expiration Date.

     EXCEPT FOR  CERTAIN  FEES PAID TO  BROKER-DEALERS  AND  CHARGED BY THE
SUBSCRIPTION AGENT THAT WILL BE PAID BY THE COMPANY, ALL COMMISSIONS,  FEES
AND OTHER EXPENSES  (INCLUDING  BROKERAGE  COMMISSIONS  AND TRANSFER TAXES)
INCURRED IN CONNECTION  WITH THE PURCHASE,  SALE OR EXERCISE OF RIGHTS WILL
BE FOR THE  ACCOUNT  OF THE  TRANSFERRING  HOLDER OF THE RIGHTS AND NONE OF
SUCH  COMMISSIONS,  FEES OR  EXPENSES  WILL BE PAID BY THE  COMPANY  OR THE
SUBSCRIPTION AGENT.

     The Rights will be eligible for transfer through,  and the exercise of
the Rights may be effected through, the facilities of the Transfer Agent.

NO RECOMMENDATION

     Neither the Company nor the Board of  Directors  of the Company  makes
any  recommendations  regarding  whether  Rights  Holders should sell their
Rights or whether Rights Holders should exercise their Rights.

PARTICIPATION BY FUEL TECH

     Fuel  Tech  has not yet made a  determination  as to  whether  it will
participate  in  the  Rights  Offering,   and  will  do  so  following  the
distribution  of the  Rights  based upon  several  factors,  including  the
offering price, Fuel Tech's financial  position and other factors.  If Fuel
Tech  were  to  participate,  it may  desire  to  participate  through  the
conversion of the outstanding  $495,000 loan by one of its  subsidiaries to
the Company.  Such a participation,  if agreed to in the sole discretion of
the Company,  would  represent a Basic  Subscription in respect of 31.9% of
the Common Shares currently owned by Fuel Tech.

SUBSCRIPTION AGENT

     The Company has engaged ChaseMellon  Shareholder  Services,  L.L.C. as
the Subscription  Agent for the Rights  Offering.  The Company will pay the
fees  and  expenses  of the  Subscription  Agent,  and has also  agreed  to
indemnify  the  Subscription  Agent from certain  liabilities  which it may
incur in connection with the Rights.

INFORMATION AGENT

     The Company has appointed ChaseMellon Shareholder Services,  L.L.C. as
Information  Agent for the Rights  Offering.  The Company will pay the fees
and expenses of the Information  Agent and has also agreed to indemnify the
Information Agent from certain  liabilities that it may incur in connection
with the Rights Offering.

     Any  questions or requests  for  assistance  concerning  the method of
exercising  Rights to purchase  Series B Preferred  Stock or for additional
copies of this Prospectus can be directed to the  Information  Agent in the
continental United States at ChaseMellon Shareholder Services,  L.L.C., 450
West 33rd Street,  New York,  NY 10001,  Phone:  (888)  224-2745 and in the
United Kingdom at Computershare Services,  P.L.C., P.O. Box, Consort House,
East Street, Bedminister, Bristol, BS 991XZ, Phone: 1179-370-672.


      CERTAIN UNITED STATES FEDERAL INCOME TAX CONSEQUENCES TO HOLDERS

     The following is a general  summary of certain  United States  Federal
income tax consequences  (the "Tax  Consequences") to the Company's Holders
who  are  citizens  or  residents  of the  United  States  of the  proposed
distribution  to such  Holders  of  Rights  to  acquire  shares of Series B
Preferred  Stock of the  Company.  This summary does not address any state,
local, foreign, estate or gift tax considerations. This summary is included
for general information only. This summary is based upon laws, regulations,
revenue rulings and decisions as of July 10, 1998, all of which are subject
to  change or  differing  interpretations;  any such  change  could  have a
retroactive  effect  and may  also  have a  negative  tax  impact.  The tax
treatment  of a Holder  may vary  depending  upon the  Holder's  particular
circumstances  and  certain  Holders  such  as  tax  exempt   corporations,
insurance  companies,  "S" corporations,  banks, foreign estates or trusts,
foreign  corporations  and persons who are not citizens or residents of the
United States,  may be subject to special rules not discussed  below.  This
summary is limited to Holders who are  citizens or  residents of the United
States or  corporations  organized  under the laws of a state of the United
States who will hold the Rights as "capital  assets"  within the meaning of
Section 1221 of the Internal Revenue code of 1986, as amended (the "Code").
HOLDERS  SHOULD  CONSULT  THEIR OWN TAX  ADVISORS  AS TO THE  SPECIFIC  TAX
CONSEQUENCES  TO THEM OF THE  OFFERING  AND THE  RIGHTS  IN  LIGHT OF THEIR
PARTICULAR CIRCUMSTANCES.

RECEIPT OF RIGHTS BY HOLDERS

     Code Section  305(b)(5)  provides that a  distribution  of convertible
preferred  stock is taxable under Code Section 301 as a dividend  unless it
is  established  that  such  distribution  will not have  the  result  of a
disproportionate  distribution.  Rights to  acquire  convertible  preferred
stock are treated the same as the stock  itself.  Holders in  jurisdictions
where  Securities  have not been  registered  or  where  an  exemption  for
registration is not available will not receive, or be able to exercise, the
Rights. Holders of less than fifty (50) Common Shares shall not receive any
Rights pursuant to this offering plan.  Additionally,  management  believes
that some Holders will exercise their Rights and some will not and there is
an  Oversubscription  Privilege.  Consequently,  the distribution of Rights
will be a  disproportionate  distribution and will be taxable as a dividend
pursuant to Code Section 301. Therefore,  a Holder who receives Rights will
(i) recognize ordinary income (treated as a dividend for Federal income tax
purposes)  equal to the  lesser of: (a) the Value of the Rights on the date
of receipt,  or (b) the Company's current and/or  accumulated  earnings and
profits  ("E&P") for the taxable year in which the Rights are  distributed;
(ii) reduce the adjusted tax basis of the Common Shares of the Company held
by the  Holder by the  excess of the Value of the  Rights  over the  amount
required to be treated as a dividend;  and (iii) recognize  capital gain to
the  extent  such  excess  Value  exceeds  the  adjusted  tax  basis of the
Company's Common Shares held by the Holder. Characterization of the capital
gain  recognized for Federal  income tax purposes,  if any, as long term or
short term capital  gain,  is  determined  by  reference  to each  Holder's
individual holding period for the Company Common Shares.  Management of the
Company  believes that the Company will have no current and/or  accumulated
E&P for the taxable year in which the Rights are distributed. Consequently,
Management  believes  that no  portion  of the  Rights  will be  taxable as
ordinary  income to  Holders.  No  attempt  has been made to  independently
verify whether  current and/or  accumulated E&P exist or are anticipated to
exist for the taxable year of the distribution of the Rights.  Accordingly,
there can be no assurance that current and/or accumulated E&P exist or will
exist for the taxable year of the distribution of the Rights. In any event,
the Company will provide each Holder with an  information  statement  after
the  close  of the  taxable  year  in  which  the  Rights  are  distributed
indicating the amount,  if any, of the distribution  that is required to be
treated as ordinary income under the foregoing rules.

DETERMINATION OF VALUE

     The  fair  market  value  of  property  is  a  question  of  fact  and
acknowledged  experts  may  disagree  as to  the  fair  market  value  of a
particular item of property.  In some  instances,  the fair market value of
property  may not be  ascertainable  for tax  purposes  which may  postpone
income  recognition  for  Federal  income tax  purposes.  The Rights  would
constitute a distribution or property. In the instant case, no appraisal of
the Rights will be obtained,  but it is anticipated that the Rights will be
purchased and sold through usual investment  channels and the selling price
thereof  at or near the date the  Rights  are  distributed  will  likely be
deemed the Value of the Rights.  No  assurance  can be given as to what the
Value of the Rights will be or that the Rights will be  considered  to have
an ascertainable fair market value.

TAX BASIS OF RIGHTS

     Holders  receiving Rights will have a tax basis therein equal to their
Value. As to Holders,  their basis in their shares will be reduced, but not
below zero, by an amount equal to the excess of such Value over the amount,
if any, treated as ordinary income under the rules discussed above.

SALE OF RIGHTS

     A  Holder  who  sells  Rights  prior  to  exercise  will  recognize  a
short-term  gain or loss equal to the  difference  between his tax basis in
the Rights sold and the amount realized on the sale.

EXERCISE OF RIGHTS; BASIS OF STOCK RECEIVED

     The exercise of Rights will not have any separate  Federal  income tax
consequences,  nor will the  receipt  of the  shares of Series B  Preferred
Stock upon such exercise. Such shares will have a basis equal to the amount
paid  therefor  on  exercise  plus the  Holder's  tax  basis in the  Rights
exercised.

LAPSE OF RIGHTS PRIOR TO EXERCISE

     If a Holder does not sell or  exercise  the Rights  received,  and the
Rights expire,  the Holder will realize a short-term  capital loss equal to
the tax basis of the  expired  Rights.  No  adjustment  to the basis of the
Company shares of a Holder will result.

CONVERSION OF PREFERRED STOCK

     Holders who convert their Series B Preferred  Stock into Common Shares
will not recognize any gain or loss upon such conversion.  A Holder's basis
in the Common Shares acquired through conversion will be equal to the basis
which the Holder  had in the Series B  Preferred  Stock so  converted.  The
Holding  period for such Common Shares shall include the holding period for
the converted Series B Preferred Stock.

NON-DISPROPORTIONATE DISTRIBUTION

     Treasury  Regulations Sections 1.305-6 provide that where a conversion
right (of preferred  into common  shares) may be exercised over a period of
many years and the dividend  rate is consistent  with market  conditions at
the time of distribution of the stock,  there is no basis for predicting at
what  time and the  extent  to  which  the  stock  will be  converted,  the
distribution  may  not  be  a   "disproportionate   distribution."  If  the
distribution of Rights is not a  disproportionate  distribution,  it may be
tax free  pursuant to Code  Section 305. In the event the  distribution  of
Rights is determined to be a tax-free transaction, several consequences may
result,  one of which is that the Series B Preferred  Stock received may be
treated as "Section  306 stock."  Although  the Company  believes  that the
preferred stock which would be received on exercise of the Rights would not
be Section 306 stock,  it is possible for the Internal  Revenue  Service to
challenge  this  position.  The effect of such a  designation  upon various
aspects of this offering are summarized below for information purposes.

     Code  Section  306   generally   provides  that  where  a  corporation
distributes preferred stock to its shareholders in a tax-free distribution,
the  shareholders  will  recognize  ordinary  income  at such  time as such
preferred stock is "disposed of."

     Code Section 306(c)(2)  provides that stock shall not be "Section 306"
stock if no part of the distribution would have been a dividend if, in lieu
of the stock (or rights) distribution,  a cash distribution would have been
made.  It  should  be  noted,  however,  that  dividend  consequences  of a
distribution  of cash are  determined  as of the end of the taxable year in
which the  distribution is made.  Although  management  believes that there
will be no  current  or  accumulated  E&P as of the end of the tax  year in
which the distribution  occurs, there can be no assurance that that will be
so. Therefore,  in the event there is any E&P, current or accumulated as of
the end of the year in which the  distribution  of Rights  occurs,  and the
distribution itself is determined to be a tax-free  distribution,  any gain
recognized on the disposition of the Rights or the preferred stock received
on  exercising  the Rights  would be taxable as ordinary  income and not as
capital gain.

     The basis and the  holding  period for  computation  of  long-term  or
short-term  capital  gain or loss of the Rights  would be  determined  with
reference to the basis of the  previously  owned Common  Shares.  The basis
provisions  of Code  Section  307 would  require a Holder to  allocate  the
adjusted basis of the previously owned Common Shares between the previously
owned  Common  Shares and the Rights  based on relative  fair market  value
(after the  distribution  of the Rights).  Code Section 307(b)  provides an
exception to the  allocation of basis  requirement if the fair market value
of the Rights are less than fifteen  (15%) percent of the fair market value
of the previously  owned stock.  In such cases,  the allocation of basis is
not  required  but becomes an election  available  to the  stockholder.  As
discussed  above,  no  representation  or assurances  can be made as to the
Value of the Rights.

     If a Holder's basis in the Rights is determined  with reference to his
previously  owned  Common  Shares,  lapse of the Rights  would  result in a
capital  loss  measured  by the  Holder's  basis  in  the  Rights  and  the
determination  of whether such loss is long-term or short-term would be the
same as the holding period of the previously owned Common Shares.

     A Holder who converts the Series B Preferred  Stock into Common Shares
will  not  recognize  gain  or  loss  on  such  conversion.  Under  certain
circumstances, sale of the Common Shares acquired thereby may be treated as
being sale of "stock other than common stock" such that any resulting  gain
would be treated as ordinary income rather than capital gain.

     Even if the Rights,  the Series B Preferred Stock or resultant  Common
Shares are treated as "stock  other than common  stock,"  there are several
methods available to Holders to avoid the adverse tax consequences  arising
from such  designation.  One such  method  would be the sale of the  entire
stock interest of the Holder.


      RATIO OF EARNINGS TO FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

     For the years ended December 31, 1993, 1994, 1995, 1996 and 1997 and
for the period from January 1, 1992 through December 31, 1997 and for the
three month periods ended March 31, 1997 and 1998 and for the period from
January 1, 1992 through March 31, 1998, the Company's earnings were
inadequate to cover fixed charges by approximately (in thousands) $131;
$1,107; $2,024; $3,489; $3,764; $10,853; $961; $741; and $11,594,
respectively.

                              USE OF PROCEEDS

     The net  proceeds to be  received by the Company  from the sale of the
50,000 shares of Series B Preferred Stock offered  hereby,  are expected to
be  approximately  $3.1 million,  assuming an offering  price of $74.25 per
share,  estimated  Subscription  Fees and  expenses  of  $600,000  and full
subscription  of the Rights.  All of the net  proceeds of the  Subscription
Rights will be paid to the Company. Assuming minimum subscription using the
foregoing  assumptions,  net  cash  proceeds  would be  approximately  $1.4
million.  The  Company  expects  to use  the  net  proceeds  of the  Rights
Offering,  assuming  full  subscription,  and apply  them to the  following
budgeted  uses:  $1,700,000  for  marketing,   field  trials  and  patents;
repayment of $200,000  plus $45,000 of interest to Fuel Tech under the Term
Loan (as defined  below);  and the balance for working  capital and general
corporate  purposes.  The  Company  expects to use the net  proceeds of the
Rights  Offering,  assuming  minimum  subscription,  and apply  them to the
following budgeted uses: $750,000 for marketing,  field trials and patents;
repayment of $100,000  plus $26,000 of interest to Fuel Tech under the Term
Loan (as defined  below);  and the balance for working  capital and general
corporate purposes.

     The  allocation  of the net proceeds of this  offering set forth above
represents  the Company's  best  estimate  based upon its present plans and
certain assumptions  regarding general economic and industry conditions and
the Company's  future revenues and  expenditures.  The Company reserves the
Right to reallocate the proceeds within the above  described  categories or
to other purposes in response to, among other things, changes in its plans,
industry conditions, and the Company's future revenues and expenditures.

     Based on the Company's  operating plan,  management  believes that the
net proceeds from this offering, together with the $1.4 million Bridge Loan
effected in 1998, will be sufficient to meet the Company's anticipated cash
needs  and  finance its  operations  through  January  2000 (assuming  full
subscription)  and  through  April 1999  (assuming  minimum  subscription).
Thereafter,   the  Company  anticipates  that  it  may  require  additional
financing to meet its current or future plans. See "RISK FACTORS -- Factors
Relating to the Company -- Independent  Auditor's Report" and "-- Liquidity
and Capital Requirements" and "-- No Assurances of Additional Funding."

     Net proceeds not immediately required for the purposes described above
will be invested  principally  in U.S.  government  securities,  short-term
certificates  of  deposit,   money  market  funds,  or  other   high-grade,
short-term, interest-bearing investments.

     As described herein,  Fuel Tech has not yet made a determination as to
whether  it  will  participate  in the  Rights  Offering,  and  will  do so
following  the  distribution  of the  Rights  based upon  several  factors,
including  the offering  price,  Fuel Tech's  financial  position and other
factors.  If Fuel Tech were to  participate,  it may desire to  participate
through  the  conversion  of the  outstanding  $495,000  loan by one of its
subsidiaries to the Company. If Fuel Tech were to participate by converting
such loan (for which the Company's consent would be required) and, assuming
full subscription,  net cash proceeds, as well as outstanding  indebtedness
of  the  Company,  would  decrease  by  approximately  $495,000.  Any  such
conversion,  if agreed by the Company, would not be included in calculating
aggregate cash proceeds received by the Company in determining  whether the
minimum subscription has been met.

                        PRICE RANGE OF COMMON SHARES

     The  Company's  Common  Shares were listed on Nasdaq  under the symbol
"CDTI"  through June 30, 1998.  Effective  July 1, 1998,  the Common Shares
were delisted and currently  trade on the OTC  Electronic  Bulletin  Board,
although no assurances can be given that such shares will continue to trade
thereon or in the over-the-counter market, in what are commonly referred to
as the "pink sheets".  The following table sets forth the high and low sale
prices by quarter through June 30, 1998 as reported by Nasdaq, and for July
1 through July 29, 1998 in the OTC Electronic Bulletin Board.

                                                       High         Low
                                                       ----         ---
1st Quarter 1996................................       7 3/8         5
2nd Quarter 1996................................       6 3/8       4 3/8
3rd Quarter 1996................................         6         3 7/8
4th Quarter 1996................................       4 1/4         2
1st Quarter 1997................................       5 1/2         2
2nd Quarter 1997................................       4 1/2       3 1/4
3rd Quarter 1997................................       4 1/8       2 1/4
4th Quarter 1997................................       3 3/4      1 3/16
1st Quarter 1998................................       3 1/2       1 3/8
2nd Quarter 1998................................       1 3/4       1 3/4
3rd Quarter 1998 (through August 4, 1998).......         2         1 7/8

     As of August 4, 1998,  the last sale  price for the  Common  Shares as
reported by the OTC  Electronic  Bulletin Board was $1.88 per Common Share.
As of _______  __,  1998,  there  were ___  Holders of record of the Common
Shares.

                              DIVIDEND POLICY

     The Company has to date not paid  dividends  on its Common  Shares and
does not intend to pay any dividends to its Holders of Common Shares in the
foreseeable future.

     Holders of the Series A Preferred  Stock and Series B Preferred  Stock
are entitled to receive, when, as and if declared by the Board out of funds
of the Company  legally  available  therefor,  cash dividends at the annual
rate of 9% of the $500  stated  value  and  liquidation  preference  of the
Series A Preferred Stock price per share and 9% of the $______ stated value
and liquidation preference of the Series B Preferred Stock price per share,
respectively;  provided, however, that in lieu of making dividends in cash,
the  Company  may elect,  by giving  written  notice to each  holder of the
Series A Preferred Stock and Series B Preferred  Stock, as the case may be,
to pay  dividends  in kind  at the  annual  rate of 11% of the  Liquidation
Preference (cash dividends and dividends in kind are each deemed "Preferred
Dividends").  Dividends  payable to the  holders of the Series A  Preferred
Stock and Series B Preferred Stock are payable quarterly in arrears, on the
first business day of January,  April,  July and October of each year (each
such date being  hereinafter  referred  to as a "Dividend  Payment  Date"),
commencing  July 1,  1998.  Preferred  Dividends  on  shares  of  Series  A
Preferred  Stock and Series B Preferred Stock shall be cumulative and shall
accrue from the date of original issuance. It is presently anticipated that
the Company will pay  dividends  on shares of the Series A Preferred  Stock
and  Series B  Preferred  Stock in shares of Series A  Preferred  Stock and
Series B Preferred Stock, respectively,  and any earnings which the Company
may  realize in the  foreseeable  future  will be  retained  to finance the
development and expansion of the Company.

                               CAPITALIZATION

     The following table sets forth the capitalization of the Company as of
March 31,  1998,  and the as adjusted  capitalization  of the Company as of
March 31, 1998 after  giving  effect to (i) the issuance of $1.4 million of
Bridge Loan Notes,  (ii) the distribution of and the exercise of the Rights
by Holders of Common  Shares and the  contribution  of  approximately  $3.1
million (assuming full subscription,  net of estimated  Soliciting Fees and
expenses of the Rights Offering of $600,000),  to the Company's capital and
the conversion of the Bridge Loan Notes into Series A Convertible Preferred
Stock and (iii)  the  distribution  of and the  exercise  of the  Rights by
Holders of Common Shares and the contribution of approximately $1.4 million
(assuming  minimum  subscription,  net of  estimated  Soliciting  Fees  and
expenses of the Rights Offering of $600,000),  to the Company's capital, in
each case as if such  events  occurred  as of March 31,  1998.  See "USE OF
PROCEEDS."

<TABLE>
<CAPTION>
                                                                            March 31, 1998
                                                            --------------------------------------------
                                                                            (in thousands)
                                                                   AS ADJUSTED       AS ADJUSTED      AS ADJUSTED FOR
                                                                 FOR BRIDGE LOAN     FOR RIGHTS       RIGHTS OFFERING
                                                  ACTUAL                           OFFERING (FULL        (MINIMUM
                                                                                    SUBSCRIPTION)      SUBSCRIPTION)
                                              ------------        -----------       -------------       -----------
<S>                                           <C>                 <C>               <C>                 <C>        
Short-term Debt
    Current Portion Term Loan
    payable to Platinum Plus, Inc.            $        100        $       100       $         100       $       100
    (FN1)............................         ------------        -----------       -------------       -----------
       Total short-term debt.........                  100                100                 100               100
                                              ------------        -----------       -------------       -----------
Long-term Debt
    Term Loan payable to Platinum
       Plus, Inc. (FN1)..............                  395                395                 395               395
    Bridge Loan payable to Fuel Tech.                   --                500 (FN2)           -- (FN6)          500 (FN2)
    Bridge Loan payable to other                        --                900 (FN2)           -- (FN6)          900 (FN2)
    lenders .........................         ------------        ------------      ------------        -----------
       Total long-term debt..........                  395              1,795                 395             1,795
                                              ------------        ------------      -------------       -----------
Series A Redeemable Preferred
      Stock (FN3)....................                   --                 --               1,400                --
Shareholders' (Deficit) Equity
    Series B Preferred Stock (FN4)...                   --                 --               3,112             1,400
    Common Stock (FN5)...............                  126                126                 126               126
Additional Paid-in Capital...........               11,188             11,188              11,188            11,188
Deficit accumulated during the
   development stage.................              (11,594)           (11,594)            (11,594)          (11,594)
                                              ------------        ------------      --------------      ------------
Total Shareholders' (Deficit) Equity.                 (280)              (280)              2,832             1,120
                                              ------------        -------------     -------------       -----------
Total Capitalization.................         $        215        $     1,615       $       4,727       $     3,015
                                              ============        ============      =============       ===========

- ------------------------------------------------

<FN>

(1)  Platinum Plus, Inc.  ("Platinum Plus") is a wholly owned subsidiary of
     Fuel Tech.  The principal  amount of the Term Loan is payable in three
     annual  installments  of $100,000  each on July 1 of each of the years
     1998  through  2000 with a final  installment  of  $195,000 on July 1,
     2001. On July 1, 1998, Platinum Plus elected to defer the repayment of
     the  $100,000 of  principal  which was payable on that date.  Platinum
     Plus has  reserved  the right,  however,  to call this  payment at any
     time.  As of the  date  of  this  prospectus,  Platinum  Plus  has not
     demanded  repayment.  Interest at a rate of 8% per annum is payable on
     the unpaid  balance  on each  principal  payment  date.  The  interest
     accrued  on the note as of July 1, 1998 was paid by the  Company.  See
     Note 7 to the Annual  Financial  Statements for information  regarding
     the loan payable by the Company. As described under "USE OF PROCEEDS,"
     Fuel  Tech has not yet  decided  whether  it will  participate  in the
     Rights  Offering.  If Fuel Tech were to participate by converting such
     loan (for  which the  Company's  consent  would be  required)  and the
     Rights  Offering  was fully  subscribed,  net cash  proceeds  from the
     Rights Offering,  as well as outstanding  indebtedness of the Company,
     would  decrease  by  approximately  $495,000.  If  Fuel  Tech  were to
     participate  and the Rights  Offering was  minimally  subscribed,  the
     outstanding   indebtedness   of  the   Company   would   decrease   by
     approximately  $495,000 and  shareholders'  equity  would  increase by
     approximately $495,000.

(2)  Assumes  receipt of the  proceeds  of the Bridge  Loan as of March 31,
     1998. See "CERTAIN  RELATIONSHIPS  AND RELATED  TRANSACTIONS -- Bridge
     Loan."

(3)  For a description of the Series A Convertible Preferred Stock issuable
     upon the  conversion  of the Bridge Loan Notes,  see  "DESCRIPTION  OF
     CAPITAL  STOCK -- Preferred  Stock -- Series A  Convertible  Preferred
     Stock" and "CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS -- Terms of
     Series A Convertible  Preferred Stock." Shares of Series A Convertible
     Preferred  Stock,  once issued,  are  convertible at the option of the
     Holders thereof into Common Shares at a conversion  price of $1.50 per
     share,  which  conversion  price  will be  deemed to have been paid in
     full,  at no extra cost to the holder  thereof,  with the tendering of
     the  Series A  Preferred  Stock  in  connection  with  the  conversion
     thereof.  Series A  Convertible  Preferred  Stock is redeemable at the
     holder's option after four years.

(4)  For a description  of the Series B Convertible  Preferred  Stock,  see
     "DESCRIPTION   OF  CAPITAL  STOCK  --  Preferred  Stock  --  Series  B
     Convertible Preferred Stock." Shares of Series B Convertible Preferred
     Stock,  once  issued,  are  convertible  at the option of the  Holders
     thereof into 33 Common Shares at no cost to such Holder.

(5)  Based on the number of shares outstanding at March 31, 1998.  Excludes
     (i)  427,784   shares  of  Common  Stock  issuable  upon  exercise  of
     outstanding  options at a weighted average exercise price of $3.50 per
     share;  and (ii) 75,000 shares of Common Stock  issuable upon exercise
     of outstanding  warrants at a weighted average exercise price of $7.66
     per share.

(6)  Assumes  mandatory  conversion  of the Bridge Loan Notes into Series A
     Preferred  Stock.  In the event that the Rights Offering does not meet
     the minimum net subscription of $1.75 million required under the terms
     of the Bridge  Loan Notes to  automatically  convert  the Bridge  Loan
     Notes into Series A Preferred  Stock, the Bridge Loan may be converted
     at any time at the option of the Bridge Loan Lenders after January 31,
     1999. See "CERTAIN  RELATIONSHIPS  AND RELATED  TRANSACTIONS -- Bridge
     Loan."

</FN>
</TABLE>

                                  DILUTION

     At March 31,  1998,  the Company had a negative  tangible net worth of
$280,000 or $0.11 per Common  Share based on the  2,516,666  Common  Shares
outstanding. Negative tangible net worth per share represents the amount of
the  Company's  total assets less the amount of its  intangible  assets and
liabilities,  divided by the  number of Common  Shares  outstanding.  After
giving  effect to the receipt of net proceeds  (assuming a public  offering
price of $74.25 per share of Series B Preferred  Stock,  full,  minimum and
midpoint  subscription  of the Rights and the  immediate  conversion of the
foregoing  shares of Series B Preferred  Stock into shares of Common Stock)
from the sale of the securities  offered hereby, the pro forma net tangible
book value of the Company at March 31, 1998, would have been  approximately
$.83,  $.51 and $.68 per Common Share,  respectively.  This would result in
dilution to the new public  investors  (i.e.,  the  difference  between the
Offering Price of a Common Share  underlying  the Series B Preferred  Stock
offered  hereby and the net tangible book value thereof after giving effect
to this Offering) of approximately  $1.43, $1.74 and $1.57 per Common Share
(based on full,  minimum  and  midpoint  subscription),  respectively.  The
following table  illustrates the per share dilution under three  scenarios:
(i) full  subscription  of the Rights;  (ii)  minimum  subscription  of the
Rights; and (iii) a midpoint between the first two scenarios.

<TABLE>
<CAPTION>
                                                                                Minimum
                                                     Full Subscription        Subscription            Midpoint
                                                    --------------------  --------------------  --------------------
<S>                                                 <C>                   <C>                   <C>  
Public offering price per Common Share
   underlying the Series B Preferred Stock
   offered hereby at March 31, 1998 (FN1)....                      $2.25                 $2.25                 $2.25

Pro forma tangible book value per Common
   Share after Offering......................

   Negative tangible book value per Common
     Share at March 31, 1998.................         $(.11)                $(.11)                $(.11)

   Increase in net tangible book value per
     Common Share attributable to new
     investors...............................           .94          .83      .62          .51      .79          .68
                                                    -------    ---------  -------    ---------  -------    ---------

Dilution per Common Share to new investors
   (FN2)(FN3)(FN4)...........................                      $1.43                 $1.74                 $1.57
                                                    ====================  ====================  ====================
- -------------------------
<FN>

(1)  Public  offering  price per Common Share is  calculated  as though the
     Series B Convertible  Preferred Stock is converted into the underlying
     Common Shares of the Company, pursuant to the conversion provisions of
     such stock discussed elsewhere herein.

(2)  At March 31, 1998,  427,784 Common Shares are issuable pursuant to the
     Company's  1994  Incentive  Plan (the  "Plan").  Options with exercise
     prices less than $2.25 per Common Share, subject to the Plan's vesting
     provisions,  will result in further dilution to new investors of $.01,
     $.01 and $.01 per Common Share  assuming  full  subscription,  minimum
     subscription and midpoint subscription, respectively.

(3)  The  dilution  amounts  set forth  above  under  "Full  Subscription",
     Minimum  Subscription"  and "Midpoint"  assume  subscription to 50,000
     shares,  26,937  shares  and  38,469  shares of  Series B  Convertible
     Preferred Stock, respectively.

(4)  If the  holders  of  the  Bridge  Loan  Notes  were  to  exercise  the
     conversion   provisions  of  such  notes  into  Series  A  Convertible
     Preferred  Stock and  convert  such  stock into the  Company's  Common
     Shares,  the amounts set forth above for "Dilution per Common Share to
     new  investors"  under  the  columns  "Full   Subscription",   Minimum
     Subscription"  and "Midpoint" would have been reduced to $1.33,  $1.57
     and $1.44, per share, respectively.

</FN>
</TABLE>

     The following table sets forth, as of the date of this Prospectus, the
number  of  Common  Shares  purchased,  the  percentage  of  Common  Shares
purchased, the total consideration paid (before expenses of the 1995 Rights
Offering  and  Subscription  Fees  and  expenses  of  this  Offering),  the
percentage  of total  consideration  paid and the  average  price per share
paid, by the existing shareholders of the Company and the investors in this
Offering  assuming  the maximum  proceeds  to the  Company  from the Rights
Offering (i.e. full subscription).

<TABLE>
<CAPTION>
                                          Shares Purchased                                         Average
                                     --------------------------                                   Price per
                                        Number      Percentage        Amount      Percentage        Share
                                     -----------    -----------    -----------    -----------    -----------
<S>                                  <C>            <C>            <C>            <C>            <C>
New Investors..................       1,650,000        39.6%       $ 3,712,500       22.8%       $    2.25

Existing Shareholders..........       2,516,666        60.4%        12,569,000       77.2%            4.99
                                     -----------    -----------    -----------    -----------    -----------

     TOTAL(FN2)................       4,166,666       100.0%       $16,281,500      100.0%            3.91 (FN1)
                                     ===========    ===========    ===========    ===========    ===========
- ------------------
<FN>

(1)  Assuming full  subscription of the Rights Offering,  conversion of the
     Bridge  Loan  Notes into  Series A  Preferred  Stock  and,  subsequent
     conversion of such Series A Preferred Stock into the Company's  Common
     Shares,  the average  price per share paid by all  shareholders  would
     decrease from $3.91 to $3.47 per share.

(2)  Excludes  any  conversion  of Series A  Preferred  Stock  into  Common
     Shares.

</FN>
</TABLE>

     The following table sets forth, as of the date of this Prospectus, the
number  of  Common  Shares  purchased,  the  percentage  of  Common  Shares
purchased, the total consideration paid (before expenses of the 1995 Rights
Offering  and  Subscription  Fees  and  expenses  of  this  Offering),  the
percentage  of total  consideration  paid and the  average  price per share
paid, by the existing shareholders of the Company and the investors in this
Offering  assuming  the minimum  proceeds  to the  Company  from the Rights
Offering (i.e. minimum subscription).

<TABLE>
<CAPTION>
                                          Shares Purchased                                         Average
                                     --------------------------                                   Price per
                                        Number      Percentage        Amount      Percentage        Share
                                     -----------    -----------    -----------    -----------    -----------
<S>                                  <C>            <C>            <C>            <C>            <C>
New Investors..................         888,921        26.1%       $ 2,000,100       13.7%       $    2.25

Existing Shareholders..........       2,516,666        73.9%        12,569,000       86.3%            4.99
                                     -----------    -----------    -----------    -----------               

     TOTAL.....................       3,405,587       100.0%       $14,569,100      100.0%            4.28
                                     ===========    ===========    ===========    ===========    ===========

</TABLE>


                      SUMMARY SELECTED FINANCIAL DATA

     The following  summary  selected  financial  data for each of the five
years in the period ended December 31, 1997 and for the period from January
1, 1992 through  December  31, 1997 are derived from the audited  financial
statements  of the Company.  The summary  selected  financial  data for the
three  month  periods  ended  March  31,  1997 and 1998  are  derived  from
unaudited  financial  statements of the Company.  The  unaudited  financial
statements   include  all  adjustments,   consisting  of  normal  recurring
accruals,  which the Company considers necessary for a fair presentation of
the  financial  position and the results of operations  for these  periods.
Operating  results  for the  three  months  ended  March  31,  1998 are not
necessarily  indicative  of the results that may be expected for the entire
year ending December 31, 1998. The summary  selected  financial data should
be read in  conjunction  with  "Management's  Discussion  and  Analysis  of
Financial Condition and Results of Operations" and the financial statements
and notes thereto appearing elsewhere herein.

     The Company was  incorporated  on January 19, 1994,  as a wholly owned
subsidiary of Fuel Tech.  Predecessor  financial information included below
for the period  January 1, 1992,  through  January 18,  1994,  reflects the
Company's operations prior to incorporation, at which time it was accounted
for as part of Fuel Tech.  Effective December 12, 1995, Fuel Tech completed
a Rights Offering of the Company's Common Shares,  with Fuel Tech retaining
at such time a 27.6%  ownership  interest in the Company (which as of March
31, 1998,  has  declined to a 27.4%  interest  after  giving  effect to the
exercise of stock options). The Company is a development-stage  enterprise,
and its efforts from January 1, 1992, to the present time have been devoted
to  the  research,  development  and  commercialization  of  PFCs  and  NOx
reduction  technologies to reduce emissions from diesel engines. There were
no material  activities  related to the Company's business in 1990 or 1991.
Prior  to  1990,  the  activities  of  Fuel  Tech  were  focused  on  other
applications  of PFCs  that  are  unrelated  to the  Company's  present  or
contemplated  business and were not material to the overall  development of
the Company's products.  Therefore,  such costs have been excluded from the
determination  of the  Company's  development  costs  and from the  summary
selected financial data set forth below.

<TABLE>
<CAPTION>
                                                                              Period                        Period
                                                                                from                         from
                                                                             January 1,                    January 1,
                                                                                1992,      Three Months      1992
                                              Years Ended                     through         Ended         through
                                              December 31,                   December 31,   March 31,      March 31,
                              1993      1994     1995      1996      1997       1997       1997     1998     1998
                              ------   ------    ------   ------    ------    ------      ------    -----   ------
STATEMENT OF
   OPERATIONS DATA:                                   (IN THOUSANDS, EXCEPT PER SHARE DATA)

<S>                           <C>      <C>       <C>      <C>       <C>       <C>         <C>       <C>     <C>   
Sales.....................    $   --   $   --    $   --   $   --    $  199    $  199      $   40    $  --   $  199
Costs and expenses:
   Cost of sales..........        --       --        --       --       132       132          23       --      132
   General and
   administrative.........        --      507       963    1,842     1,730     5,042         496      451    5,493
   Research and 
   development............        86      441       796    1,747     1,985     5,317         457      236    5,553
   Patent filing and              45      158       199      223       237       938          75       56      994
   maintenance............    ------   ------    ------   ------    ------    ------      ------    -----   ------
Loss from operations......       131    1,106     1,958    3,812     3,885    11,230       1,011      743   11,973
Interest expense (income),
   net....................        --        1        66     (323)     (121)     (377)        (50)      (2)    (379)
                              ------   ------    ------   ------    ------    ------      ------    -----   ------
Net loss during
   development stage......    $  131   $1,107    $2,024   $3,489    $3,764    $10,853     $  961    $ 741   $11,594
                              ======   ======    ======   ======    ======    =======     ======    =====   =======
Basic and diluted loss per
   Common Share...........       N/A  $  0.44   $  0.81  $  1.40   $  1.50       N/A     $  0.38   $ 0.29      N/A
Weighted-average shares
   outstanding............       N/A    2,500     2,500    2,500     2,517       N/A       2,512    2,517      N/A
Ratio of earnings to
   combined fixed charges
   and preferred stock
   dividends (FN1)........        --       --        --       --        --        --          --       --       --
Cash dividends declared...        --       --        --       --        --        --          --       --       --

</TABLE>

<TABLE>
<CAPTION>
                                             December 31,                         March 31,
                            1993       1994        1995       1996        1997         1998
                            ----       ----        ----       ----        ----         ----
BALANCE SHEET DATA:
                                                 (IN THOUSANDS)

<S>                       <C>         <C>      <C>        <C>         <C>          <C>     
Current assets..........  $  --       $ 513    $  8,882   $ 5,595     $  1,682     $    982
Total assets............     --         513       8,882     5,677        1,750        1,044
Current liabilities.....     --       1,370         487     1,486          894          929
Long-term debt..........     --          --         745        --          395          395
Working capital
   (deficit)............     --       (857)       8,395     4,109          788           53
Shareholders'
   equity
   (deficiency).........     --       (857)       7,650     4,191          461        (280)

<FN>

(1)  For the years ended December 31, 1993,  1994,  1995, 1996 and 1997 and
     for the period from January 1, 1992 through  December 31, 1997 and for
     the three  month  periods  ended  March 31,  1997 and 1998 and for the
     period from January 1, 1992  through  March 31,  1998,  the  Company's
     earnings were inadequate to cover fixed charges by approximately $131;
     $1,107;  $2,024;  $3,489;  $3,764;  $10,853;  $961; $741; and $11,594,
     respectively.

</FN>
</TABLE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS
              OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

     The Company is a  development-stage  enterprise,  and its efforts from
January 1, 1992 (date of inception),  to the present time have been devoted
to the research, development and, to a limited extent, commercialization of
PFCs  and NOx  reduction  technologies  to  reduce  emissions  from  diesel
engines.

RESULTS OF OPERATIONS

THREE MONTHS ENDED MARCH 31, 1997, VERSUS THREE MONTHS ENDED MARCH 31, 1998

     Sales and Cost of sales were  $40,000 and $23,000,  respectively,  for
the first quarter of 1997 and zero in the  comparable  period in 1998.  The
Company's products were purchased by Holts,  pursuant to a supply agreement
entered into in September  1996 (the  "September  1996 Supply  Agreement").
Holts  launched  the  Company's  PFC  products  for use  with  Holts'  fuel
additives  in the  aftertreatment  of fuel for  both  gasoline  and  diesel
engines in several European countries. In December 1997, Holts was acquired
by Prestone Products, Inc. ("Prestone"), a division of AlliedSignal.  Based
on management and product line changes at Holts resulting from the Prestone
acquisition, Holts did not order any product in the first half of 1998, and
the Company expect delays in sales to Holts in 1998.

     General and  administrative  expenses  decreased  from $496,000 in the
first  quarter of 1997 to $451,000 in the  comparable  period in 1998.  The
decrease is the result of the implementation of some of the Company's plans
to minimize expenses in order to conserve cash, pending securing additional
working capital. Such plans included reducing the administrative staff from
four to two, closing the Company's U.K. office and reducing management fees
charged to the Company by Fuel Tech. These efforts were partially offset by
the increased costs associated with obtaining financing.

     Research and  development  expenses were $457,000 in the first quarter
of 1997  versus  $236,000  in the  comparable  period in 1998.  The Company
significantly reduced research and development costs in 1998 due in part to
a  shift  in  emphasis   toward   commercialization   versus  research  and
development.   Other  factors   include  the  completion  of  a  number  of
fundamental  programs in 1997,  the deferral of certain field trials due to
the  Company's  diminishing  working  capital  position  and the  Company's
expanded participation in collaborative and consortium-based  programs with
potential customers and industrial partners for which it is responsible for
only a portion of the program costs.

     Patent filing and maintenance  expenses  decreased from $75,000 in the
first  three  months of 1997 to $56,000 in the  comparable  period in 1998.
Expenses  were higher in 1997 due to the costs  associated  with new patent
filings for the Company's NOx reduction technology.

     Interest  income  decreased  from $64,000 in the first three months of
1997 to  $13,000  in the  comparable  period  in 1998  as a  result  of the
Company's diminishing cash position.

     The Company is currently  taking steps to minimize  costs and expenses
in order to conserve cash pending securing additional working capital,  and
consequently,  expects costs and expenses to be lower in 1998 than in 1997,
although no assurances can be given in this regard.

1996 VERSUS 1997

     Sales and Cost of sales were zero in 1996 and $199,000  and  $132,000,
respectively,  in 1997 as the Company started  selling small  quantities of
product to Holts in 1997.  The Company's  products were purchased by Holts,
pursuant  to the  September  1996  Supply  Agreement.  Holts  launched  the
Company's  PFC  products  for  use  with  Holts'  fuel   additives  in  the
aftertreatment  of fuel for both  gasoline  and  diesel  engines in several
European  countries.  As described above, Holts was acquired by Prestone in
December 1997, and as a result the Company expects delays in sales to Holts
in 1998 . See "-- Results of  Operations  -- Three  Months  Ended March 31,
1997,  Versus Three  Months Ended March 31, 1998" and the Annual  Financial
Statements.

     As the Company begins selling product again,  gross margin is expected
to improve in the future as the PFC processing costs charged to the Company
will be reduced with subsequent production batches.

     General and administrative  expenses decreased from $1,842,000 in 1996
to  $1,730,000  in 1997.  The decrease was  primarily due to a reduction in
management fees charged by Fuel Tech as the Company hired its own personnel
and, in August 1996, terminated certain services furnished by Fuel Tech.

     Research  and  development  expenses  were  $1,747,000  in 1996 versus
$1,985,000 in 1997. The increase was primarily due to the costs  associated
with significant test programs on light-duty and heavy-duty engines and the
addition of three senior technical employees in mid-year 1996. The programs
included the use of the Company's PFC in gasoline and diesel vehicles,  the
testing  of  NOx  control   technologies  in  conjunction   with  Engelhard
Corporation   and  the  Nalco  Fuel  Tech  joint  venture   (which  is  now
wholly-owned  by Fuel Tech) and engine  testing of the PFC as  required  to
maintain registration with the U.S.  Environmental  Protection Agency. Some
of the  programs  relating  to  the  PFC  and  NOx  control  were  done  in
collaboration  with Cummins  Engine  Company,  a major U.S.  diesel  engine
manufacturer.  The Company announced that the use of the PFC in conjunction
with advanced  heavy-duty engine design techniques and a diesel particulate
filter had achieved U.S. federal emission levels for 2004. The Company also
developed a  platinum/cerium  bimetallic  fuel additive based on a platinum
and cerium compound. This product achieved emission reductions of 25-35% on
new light-duty  diesels.  Certification  testing of the bimetallic additive
for Taiwan buses equipped with  particulate  filters began in late 1997 and
field  trials are  expected to be  expanded in the second  quarter of 1998.
Discussions  with oil distribution  companies in the U.S.,  Europe and Asia
are  expected  to lead to engine  testing  and  field  trials of the PFC or
bimetallic  additive in the second half of 1998. Based on the extent of the
market  interest and the improved cost and  performance  of the  bimetallic
additive,  the Company entered into negotiations with a third party for the
supply of a cerium product based on the Company's specifications.

     In late 1997, the Company signed a development and marketing agreement
with  AMBAC  of  Springfield,  Massachusetts,  for the  fabrication  of the
ARIS(TM) 2000 urea injection  equipment  suitable for stationary and mobile
engine NOx control.  AMBAC is a major supplier of fuel injection  equipment
for diesel engine manufacturers worldwide. A prototype system was completed
in the second quarter of 1998.

     Patent  filing and  maintenance  expenses  remained  relatively  flat,
increasing from $223,000 in 1996 to $237,000 in 1997.

1995 VERSUS 1996

     General and administrative expenses increased from $963,000 in 1995 to
$1,842,000 in 1996.  The increase was due to expenses  associated  with the
Company  establishing  its own  offices,  the  recruitment  and  hiring  of
additional staff and increased management and administrative costs provided
by  Fuel  Tech  pursuant  to  a  management  and  services  agreement  (the
"Management  and Services  Agreement").  In the first six months of 1996, a
greater portion of Fuel Tech  management's  time was spent on the Company's
business  activities,   which  included  research  programs,   establishing
relationships  with  potential  marketing  partners and hiring  staff.  The
Company  established  its own  payroll  and hired  some of these  Fuel Tech
executives full-time in August 1996.

     Research  and  development  expenses  were  $796,000  in  1995  versus
$1,747,000 in 1996. The increase was primarily due to  significant  testing
on light-duty and heavy-duty engines using the Company's PFC alone and with
a catalytic  oxidizer.  These test programs were  conducted in  conjunction
with  potential  marketing  partners.  The Company  also hired three senior
technical  employees  during 1996, and its senior  officers,  who were Fuel
Tech employees in 1995, spent a greater percentage of their time developing
and managing research projects in 1996 than in 1995.

     Patent  filing and  maintenance  expenses were $199,000 in 1995 versus
$223,000  in  1996.  The  increase  was  primarily   attributable   to  the
preparation and filing of new patent applications.

LIQUIDITY AND SOURCES OF CAPITAL

     The Company is a  development-stage  company and has  incurred  losses
since inception  (January 1, 1992) aggregating  $10,853,000 and $11,594,000
at December 31, 1997, and March 31, 1998, respectively. The Company expects
to incur losses through the  foreseeable  future as it further  pursues its
research,  development and commercialization  efforts. Although the Company
started  selling  product in 1997,  it sold no product in the first half of
1998 and continues to be dependent  upon sources  other than  operations to
finance its working capital requirements.

     In December 1995, the Company raised  approximately $10.5 million, net
of offering  expenses and broker-dealer  commissions of approximately  $1.3
million,  through the 1995 Rights  Offering of its shares by Fuel Tech. The
Company then repaid Fuel Tech  approximately  $2.3 million in  intercompany
loans.

     On February 17, 1998,  Fuel Tech agreed to provide the Company with up
to $500,000 in order to fund its cash  requirements  until such time as the
Company obtains the long-term financing it is seeking. On May 20, 1998, the
$500,000  commitment was converted into a bridge loan (the "Bridge  Loan"),
which constitutes  senior secured debt, bearing interest at the rate of ten
percent  per  annum  and  maturing   April  15,   2001.   The  Bridge  Loan
automatically  converts into Series A Convertible  Preferred Stock upon the
conclusion of a public or private  financing that contributes $1.75 million
of additional net proceeds to the Company  (including the Rights  Offering,
if consummated and assuming it meets such  conditions).  The Bridge Loan is
secured by all of the Company's intellectual property. The Company has also
received an  additional  $900,000 of  financing  under the same Bridge Loan
(having  the same terms and  conditions,  including  maturity  date,)  from
outside  investors.  As of July 1998,  the Company  received  $1.4 million,
representing all of the proceeds from the Bridge Loan.

     For the period  from  January 1, 1992,  through  March 31,  1998,  the
Company used cash of  $11,071,000  in operating  activities.  In 1997,  the
Company  repaid  $250,000 of a $745,000  promissory  demand  note  ("Demand
Note") with Fuel Tech and restructured the remaining amount into a $495,000
term note ("Term Note") with  Platinum  Plus,  Inc.  ("Platinum  Plus"),  a
wholly owned subsidiary of Fuel Tech. The principal amount of the Term Note
is payable in three annual  installments of $100,000 each on July 1 of each
of the years 1998 through 2000 with a final installment of $195,000 on July
1, 2001.  On July 1, 1998,  Platinum Plus elected to defer the repayment of
the $100,000 of principal which was payable on that date. Platinum Plus has
reserved the right,  however,  to call this payment at any time.  As of the
date of this prospectus, Platinum Plus has not demanded repayment. Interest
at a rate of eight  percent  per annum is payable on the unpaid  balance on
each principal payment date. The interest accrued on the note as of July 1,
1998 was paid by the Company. See "USE OF PROCEEDS."

     At December  31, 1996 and 1997,  and March 31,  1998,  the Company had
cash,   cash   equivalents   and  short-term   investments  of  $5,270,000,
$1,239,000, and $657,000, respectively.  Working capital at those dates was
$4,109,000,  $788,000, and $53,000, respectively. At December 31, 1996, the
Company owed Fuel Tech  $745,000  under the Demand Note,  while at December
31, 1997, and March 31, 1998, the Company owed Fuel Tech $495,000 under the
Term Note. In light of the Company's  diminishing cash and working capital,
the Company has taken steps to decrease expenditures in 1998, as more fully
discussed  in "Results of  Operations  -- Three Months Ended March 31, 1997
Versus Three Months Ended March 31, 1998."

     Effective  as of October 28,  1994,  Fuel Tech granted two licenses to
the Company for all patents and rights  associated with its PFC technology.
Effective  November 24,  1997,  the  licenses  were  canceled and Fuel Tech
assigned to the Company all such patents and rights on terms  substantially
similar to the licenses. In exchange for the assignment, the Company agreed
to pay Fuel Tech a royalty of 2.5% of its annual  gross  revenue from sales
of the PFC, commencing in 1998. The royalty obligation expires in 2008. The
Company may at any time terminate the royalty obligation by payment to Fuel
Tech in any year from 1998 through 2008 of amounts,  depending on the year,
declining  from $12 million in 1998 to $1.1 million in 2008. The Company as
assignee and owner will  maintain  the  technology  at its own expense.  To
date, no royalties have been paid to Fuel Tech. See "CERTAIN  RELATIONSHIPS
AND RELATED TRANSACTIONS -- Technology Assignments."

     In September  1996, the Company  entered into a supply  agreement with
Holts to sell the Company's  PFC under the Platinum Plus  trademark for use
with  Holts'  fuel   additives   in  the   consumer  car  care  market  for
aftertreatment  of fuel for both new and used diesel  engines in  vehicles.
The agreement covers  territories  worldwide except for North,  Central and
South America.  This  agreement has a 10-year term with extension  options.
The  exclusivity  of the  agreement is  determined  by the  attainment  (or
reasonable   effort  toward  the  attainment)  of   predetermined   minimum
performance  levels  for  each  territory  on a  calendar-year  basis.  The
agreement also provides for the marketing of a platinum-based gasoline fuel
additive by Holts on similar terms and in similar territories, if developed
by the Company.  The Company's PFC were test-marketed by Holts in Europe in
the fourth quarter of 1996, with commercial  sales  commencing in the first
quarter of 1997.  Based on jointly funded testing by Holts and the Company,
such a gasoline  product was developed by the Company and launched by Holts
in September 1997 under the Cat Guard name, with disappointing results. See
"BUSINESS -- Platinum Plus -- Europe and Asia." The exclusivity  granted to
Holts was revoked by the Company in the second quarter of 1998 due to lower
than  expected  performance  levels,  and the  Company may  terminate  this
agreement at its option after March 1999.

     As previously  noted,  the Company  anticipates  incurring  additional
losses through the  foreseeable  future as it further pursues its research,
development and commercialization efforts. Management anticipates, with the
proceeds of the $1.4 million Bridge Loan,  having  sufficient  resources to
fund its operations  through November 1998. The Company intends to fund its
future cash needs through the Rights Offering. Although management believes
that  it  will be  successful  in its  fund-raising  efforts,  there  is no
guarantee  that such funds will be available on terms  satisfactory  to the
Company.

     As discussed  elsewhere in this Prospectus,  if the Rights Offering is
fully  subscribed  or the minimum  subscription  is  obtained,  the Company
anticipates receiving $3.1 million and $1.4 million,  respectively,  net of
Soliciting Fees and expenses of the offering estimated to be $600,000.  The
Company  believes  that the net proceeds of the Rights  Offering,  together
with the net proceeds of $1.4 million from the bridge financing effected in
1998,  will  be  sufficient  for the  commercialization  of its PFC and NOx
products  through  January 2000  (assuming full  subscription)  and through
April 1999 (assuming minimum  subscription),  although no assurances can be
given in this  regard.  Thereafter,  the  Company  anticipates  that it may
require  additional  funding in the form of a public or private offering of
the Company's  securities.  Any offering of the Company's equity securities
may result in immediate and significant dilution to the shareholders of the
Company.  The ability of the Company to consummate a public  offering or to
obtain  other  financing  will  depend  on  the  status  of  the  Company's
commercial  efforts,  marketing  programs  and  field  trials,  as  well as
conditions then prevailing in the relevant capital markets. There can be no
assurance  that such  funding  will be  available  when  needed or on terms
acceptable to the Company. Absent a successful Rights Offering, and without
continued  sufficient  financing from an alternative  source, the Company's
ability  to meet  its  current  plans  for  expansion  will  be  materially
adversely affected, and the Company will not be able to continue as a going
concern  beyond  November  1998.  See  Note  1  to  the  Annual   Financial
Statements, the Report of Independent Auditors, and the Note to the Interim
Financial Statements.

     Holders of the Series A Preferred  Stock and Series B Preferred  Stock
are entitled to receive, when, as and if declared by the Board out of funds
of the Company  legally  available  therefor,  cash dividends at the annual
rate of 9% of the $500  stated  value  and  liquidation  preference  of the
Series A Preferred Stock price per share and 9% of the $______ stated value
and liquidation preference of the Series B Preferred Stock price per share,
respectively;  provided, however, that in lieu of making dividends in cash,
the  Company  may elect,  by giving  written  notice to each  holder of the
Series A Preferred Stock and Series B Preferred  Stock, as the case may be,
to pay  dividends  in kind  at the  annual  rate of 11% of the  Liquidation
Preference (cash dividends and dividends in kind are each deemed "Preferred
Dividends").  Dividends  payable to the  holders of the Series A  Preferred
Stock and Series B Preferred Stock are payable quarterly in arrears, on the
first business day of January,  April,  July and October of each year (each
such date being  hereinafter  referred  to as a "Dividend  Payment  Date"),
commencing  July 1,  1998.  Preferred  Dividends  on  shares  of  Series  A
Preferred  Stock and Series B Preferred Stock shall be cumulative and shall
accrue from the date of original issuance. It is presently anticipated that
the Company will pay  dividends  on shares of Series A Preferred  Stock and
Series B Preferred Stock in shares of Series A Preferred Stock and Series B
Preferred  Stock,  respectively,  and any  earnings  which the  Company may
realize  in  the  foreseeable  future  will  be  retained  to  finance  the
development and expansion of the Company.

IMPACT OF YEAR 2000

     The  Company is in the  process of  completing  an  assessment  of the
impact that the  millennium  may have on its computer  software so that its
computer  systems will function  properly with respect to dates in the year
2000 and  thereafter.  The project is estimated  to be completed  not later
than  December  31,  1998,  which is prior to any  possible  impact  on its
operating systems. The Company believes that with modifications to existing
software and conversions to new software, the Year 2000 Issue will not pose
any operational problems for its computer systems. Management believes that
the  cost  to  the  Company,   if  any,  related  to  this  issue  will  be
insignificant. In addition, during 1998, the Company intends to communicate
with its vendors to ascertain the status of their Year 2000 initiatives.

FOREIGN CURRENCY RISK

     To date, sales,  marketing and testing of the Company's PFCs have been
limited  principally to Europe.  While the Company has not  experienced any
significant  foreign  currency  exposure  with respect to such  activities,
there can be no assurance  that exposure to currency  fluctuation  will not
have a significant  effect on the Company's  operations in the future.  The
Company  intends to manage the risk of such  exposure,  if any, by entering
into foreign currency futures and option contracts.

                                  BUSINESS

GENERAL

     The Company, a Delaware corporation with a principal place of business
at 300 Atlantic Street, Stamford, Connecticut 06901, is a development-stage
specialty  chemical company supplying advanced catalytic fuel additives and
systems that reduce  harmful  emissions  from internal  combustion  engines
while improving fuel economy.  The Company's two main technology  areas are
Platinum  Fuel  Catalysts  ("PFCs") for  emission  control and fuel economy
improvement  in diesel- and  gasoline-fueled  engines,  and Nitrogen  Oxide
("NOx")  reduction  systems and chemicals for control of NOx emissions from
diesel engines.

BACKGROUND

     The Company was formed in 1994 as a wholly  owned  subsidiary  of Fuel
Tech,  which  had  conducted   fundamental  work  regarding  the  Company's
technologies. The Company was spun off by Fuel Tech in a rights offering in
1995 (the "1995 Rights  Offering"),  and Fuel Tech  currently owns 27.4% of
the Company's outstanding Common Shares. The Company raised net proceeds of
approximately  $10.5 million in the 1995 Rights Offering  which,  following
the  repayment  of $2.3  million of  intercompany  loans to Fuel Tech,  was
sufficient  to fund the  Company's  operations  through  May of  1998.  The
Company has since funded its operations  through the net proceeds  received
in  connection  with the  issuance of the Bridge Loan Notes  issued to Fuel
Tech and certain other lenders.

     At its inception,  the Company had patents for PFCs licensed from Fuel
Tech and limited testing results of PFCs. The Company currently has 12 U.S.
and 38  International  patents on PFCs and NOx  reduction  systems  and has
another 83 U.S. and International  applications  pending. In addition,  the
Company has  completed  successful  testing of a diesel fuel PFC  additive,
launched  the  marketing  of  a  PFC  used  to  rejuvenate  aged  catalytic
converters in Europe,  and developed the Advanced Reagent  Injection System
("ARIS(TM) 2000") for use in catalytic NOx reduction systems.

BUSINESS STRATEGY

     The Company's strategic objective is to become a leading developer and
supplier of (i) PFCs for emission  control and fuel economy  improvement in
diesel-  and  gasoline-fueled  engines and (ii) NOx  reduction  systems and
chemicals for control of NOx emissions from diesel engines. Key elements of
the Company's strategy include the following:

DEVELOPING MARKETS FOR PFCS AS A DIESEL FUEL ADDITIVE

     The Company  has  successfully  concluded  a study at Delft  Technical
University in the Netherlands  concerning the emission reduction effects of
PFCs used with ceramic filters for reduction in particulate  emission.  The
Company has also  demonstrated  improved  emission  reduction and increased
fuel  economy  from the use of PFCs  without  ceramic  filters in  separate
programs at Ricardo and Cummins.  The Company  seeks to capitalize on these
test  results,  coupled with the  increased  regulation  of  emissions,  by
developing a market for PFCs in the U.S. and abroad.

DEVELOPING MARKETS FOR PFCS AS A GASOLINE ADDITIVE

     The Company seeks to continue its marketing of PFCs used to rejuvenate
aged catalytic  converters,  and has begun to focus on selling this product
through service centers in Europe in conjunction with Holts. The Company is
also seeking marketing  partners to help launch the gasoline product in the
U.S. and Asia.

COMMERCIALIZING THE ARIS(TM) 2000

     The  Company  has  developed  a prototype  of the  ARIS(TM)  2000,  an
Advanced  Reagent  Injection  System to be used in the selective  catalytic
reduction  of NOx.  The  Company  believes  that  there is a market for the
ARIS(TM) 2000 as a result of increased  regulations  in California  and the
Northeast of NOx levels in large stationary  diesels.  The Company seeks to
commercialize the ARIS(TM) 2000 through  cooperative  ventures and licenses
with engine  manufacturers,  engine  distributors and catalyst and emission
control companies.

REGULATIONS - USA

DIESEL ENGINES

     1990. In the U.S.,  the EPA  established  specific  regulations  under
Title II of the CAAA pertaining to the control of NOx and particulates from
diesel  engines.  Existing  urban  buses in major  metropolitan  areas were
required  to reduce  particulate  emissions  during  engine  rebuild  as of
January 1995 and,  beginning in 1998, there will be new NOx level standards
in place for urban buses and new diesel engines.

     1995.  The EPA,  California  Air  Resources  Board  and  major  diesel
manufacturers  signed a Statement of Principles directed toward development
of low-NOx  engines to be in service by the year 2004,  which became law in
1997.   New  limits  are  2.5   g/bhp-hr  for  NOx  and  0.1  g/bhp-hr  for
particulates.

     1996.  The EPA and the  engine  manufacturers  signed a  Statement  of
Principles calling for a three-tiered progression to low emission standards
regarding  emission limits for new off-road  engines used in  construction,
agricultural and industrial equipment.

     1997. The EPA issued its proposed  regulatory program for all non-road
diesel engines except  locomotives,  mining  equipment and marine  engines.
These standards broadly parallel the transport engine standards and include
a voluntary  low-emission  engine  certification  standard to promote early
introduction of low-emitting  engines.  The EPA issued proposed regulations
for controlling  emissions from new and rebuilt diesel  locomotive  engines
that call for reductions in NOx emissions of 40%-60%  beginning in the year
2000.

     1998. The EPA is expected to announce  retrofit  guidelines to support
the use of emission control technologies on existing engines as part of the
states'  efforts to comply with ambient air quality  standards  and qualify
for emission  credit.  The EPA has sued one engine  manufacturer  and is in
negotiations  with  others over the use of "defeat  devices"  which the EPA
alleges  increases NOx emissions.  Management  believes that settlement may
require advanced or accelerated introduction of low-emission engines.

     1999 and  thereafter.  The EPA is required  to review the  progress of
emission  control  technology with a view toward further  tightening of the
2004 limits.  Industry  experts  generally agree that an integrated  system
approach  will be needed to meet these  regulations,  including  the use of
advanced  engine  design,  reformulated  fuel,  fuel  additives and exhaust
aftertreatment systems.

     Regulators are showing concern at recent  research  results which show
that while new engine  technology made great reduction in the total mass of
particulates,  the total number of particulates is not reduced. Indeed, the
number of ultra-fine  particles can increase.  Separate  research has shown
that diesel  emissions may be toxic and that  toxicity is  associated  with
soot particles.

     While no regulations  have yet been made as a result of these research
findings,  the Company  considers it probable  that there will be a further
tightening of regulations of particulate emissions; further, there may well
be regulation to reduce the very fine particles.

     Current  regulation in California  and the Northeast  states for large
stationary  diesel  engines sets NOx levels at a 50% to 90% reduction  from
normal levels  achieved  from current  production  engines under  federally
mandated Best Available Control  Technology  ("BACT") and Lowest Achievable
Emission Rate ("LAER") requirements in ozone non-attainment areas.

GASOLINE ENGINES

     Current  regulations  affecting new gasoline engine emissions  require
increasingly  lower  emissions,   longer  durability  and  enhanced  in-use
inspection of catalyst-equipped passenger vehicles, leading to the need for
technological advancements in catalytic converter design.

     Current regulation for inspection and maintenance of gasoline vehicles
is now leading  states to  introduce  programs  for testing of the existing
fleet  and  for  corrective  measures  to  be  taken  where  vehicles  fail
measurement of NOx,  Hydrocarbon  ("HC") or Carbon Monoxide  ("CO").  Based
upon  a  report  of  the  Manufacturers  of  Emission  Control  Association
("MECA"),  as of June 1998, 28 states have  implemented or were planning to
implement inspection and maintenance programs.

REGULATIONS - INTERNATIONAL

     Europe  has  similar  regulations  to  the  U.S.  but  with  different
measurement  standards,  and in general,  implementation  is one year later
than when the U.S. Euro III Vehicle Emission  Regulations  become effective
in the year 2000 and Euro IV Vehicle Emission Regulations in the year 2005.

     Current  regulations  for tunneling  and mining  equipment in Germany,
Switzerland and Austria now require the use of particulate filters.

     Japan,  Korea and Taiwan have  introduced  regulations for both diesel
and  gasoline  engines  which are not  identical  but tend to  follow  U.S.
practice.

MARKETS FOR PRODUCTS

     On-highway markets for the PFC are the consumer aftermarket, including
diesel  and  gasoline  fuel  additives;  truck  and bus  fleets;  bulk fuel
distributors;  and engine  manufacturers.  Off-road markets include mining,
construction,  agricultural,  railroad  and  marine.  Markets  for  the NOx
reduction  systems  are  engine  manufacturers  and  distributors  for both
stationary and mobile sources and catalyst manufacturers.

PLATINUM FUEL CATALYSTS

     These  are  fuel  additives  comprised  of  platinum,  rhodium  and/or
palladium,  which are used in minute  concentrations in fuel (selling for a
few (U.S.) cents per gallon of fuel treated) to improve combustion,  reduce
emissions and improve the performance  and reliability of emission  control
equipment.  The PFC may also be used in  conjunction  with  other  metallic
additives  such a copper,  iron,  manganese or cerium.  The Company's  test
programs  have shown the  bimetallic  additive of platinum and cerium to be
highly  effective  in  diesel  engines.   The  Company's  Platinum  Plus(R)
bimetallic  additive has been chemically  formulated to harness the synergy
between platinum and cerium at very low levels of metal. Levels as low as 5
ppm of metal in fuel have been found to be effective.

PLATINUM PLUS - EUROPE AND ASIA

     In September  1996, the Company  entered into an agreement with Holts,
the  world's  largest  car care  company,  to test market the PFC under the
Platinum Plus  trademark for diesel fuel in Europe and Asia.  The agreement
also pertains to a gasoline  product  launched by Holts in early 1997,  the
results of which were disappointing.  Holts reported that consumers did not
understand what the product did and indeed few consumers knew if their cars
even had a catalytic converter.  Test marketing by Holts concluded that the
product  should be sold as a  technical  sale  through  service  and repair
shops.  Holts is  considering  how to better  reposition  the product.  The
agreement with Holts is currently a non-exclusive  agreement for Europe and
certain Far East  markets and may be  terminated  at the  Company's  option
after March 1999.  For a further  discussion  of the terms of the agreement
with  Holts,  see  "MANAGEMENT'S   DISCUSSION  AND  ANALYSIS  OF  FINANCIAL
CONDITION AND RESULTS OF OPERATIONS -- Liquidity and Sources of Capital."

PLATINUM PLUS - THE AMERICAS

     This market is not covered by the  agreement  with Holts.  Discussions
are  in  progress  with  several  potential   partners  for  the  blending,
distribution and marketing of Platinum Plus in the Americas. To sell in the
U.S.,  registration is required of the  platinum/cerium  bimetallic  diesel
product and the platinum/rhodium  gasoline product. The Company expects the
expense  of  the  gasoline   product   testing  and   registration   to  be
substantially borne by marketing partners.

     The Company anticipates shipping its catalytic  concentrates to one or
several  licensed  blenders  which will add  diluents,  solvents  and other
components to make additive formulations for sale to packagers and additive
resellers.  The Company may also have its  concentrates  blended for direct
sale by the Company or sales agents to large end users.

PFCS FOR PARTICULATE FILTERS AND CATALYTIC OXIDIZERS

     The most effective method of reducing diesel particulate (smoke) is by
particulate filter or catalytic oxidizer.  There are limitations when these
devices are used alone,  which the PFC have been proven to  ameliorate.  In
two separate tests on typical bus engines,  one on a Gardner engine and one
on a Cummins engine,  the  combination of the PFC and a catalytic  oxidizer
established  high  levels  of  performance  in both  cases.  This  work was
conducted in conjunction  with  Lubrizol's  Engine Control  Systems ("ECS")
subsidiary,  a leading  supplier  of  oxidizers  and traps.  The Company is
currently  evaluating  its  PFC  in  conjunction  with  ECS as  part  of an
industry-sponsored program for off-road equipment.

     A  program  has   successfully   been  concluded  at  Delft  Technical
University,   Netherlands,  into  the  fundamental  mechanism  of  metallic
additive in the  oxidation of diesel soot with a special  focus on a system
using platinum as part of a  bimetallic-catalyst  system.  The results show
that a  bimetallic  additive  catalyst of platinum and cerium in use with a
ceramic  filter in the diesel  exhaust  gives  performance  superior to any
system  known.  Furthermore,  it  gives  a  significantly  lower  oxidation
temperature  for the soot while using much lower  metal  levels in the fuel
than other known additive  filter system.  The PFC bimetallic was effective
at levels of 5.5 ppm versus 50-100 ppm required for other additives.

     The Company also reached agreement with Cummins'  Advanced  Technology
Group to evaluate the  applications of the PFC with oxidizers and traps for
a new  generation of  low-emission  engines.  Tests of the  Company's  fuel
additive/trap  system  conducted  with an advanced  Cummins  diesel  engine
design  cut  particulate  emissions  94%  while  achieving  a more than 50%
reduction  in NOx in  relation to current  standards  and met the year 2004
emission  limits for new engines.  The tests  confirm  results  reported by
Delft in the lowering of the oxidation temperature for soot.

     The Company  believes  that there is a market for the  platinum/cerium
additive in Taiwan where a bus fleet trial confirmed the performance of the
platinum/cerium filter system.

     The  Company  also   believes  that  a  medium  term  market  for  the
platinum/cerium additive is with filters for new vehicles, especially light
duty vehicles.  In this regard, PSA Peugeot,  France, has announced that it
intends  to  introduce  particulate  filters  on new  cars in  2000.  Other
manufacturers are considering the early introduction of filter systems. The
Company recently agreed to  additive/filter  programs with 3M and Englehard
Corporation, both of whom are looking for lower soot oxidation temperatures
through the use of fuel additives with their trap systems.

     Using the platinum/cerium additive in vehicles with filters presents a
potentially large market.  This is driven by increasing  concern about fine
particle  emissions;  whereas new engines  produce little smoke,  the total
number of particles has increased. Management believes that filters are the
preferred  remedy capable of removing more than 90% of the particles.  This
focus is given further weight by the probable  classification by California
of diesel  emissions as toxic.  The toxicity is most  associated  with soot
particles.  Once  collected  on the  filter,  the soot must be  oxidized to
prevent the filter from clogging, and that is where the additive is needed.

PFC FOR ENGINES WITHOUT PARTICULATE FILTERS OR CATALYTIC OXIDIZERS

PREMIUM DIESEL

     Tests of the Company's platinum/cerium additive have demonstrated that
emissions  are  significantly  reduced  on  both  heavy  duty  engines  and
automobile  engines  without  particulate  filters or catalytic  oxidizers.
Moreover,  the emission benefits are usually accomplished by a fuel economy
improvement.

     The Company  believes that there is a near-term  market  developing in
the U.S. for a combustion  catalyst (such as platinum and cerium) to reduce
smoke, gaseous and particulate emissions from the current fleet of engines.
This market is a result of pending EPA retrofit  guidelines  which  provide
for State  Implementation  Plans ("SIP") credits, as well as state programs
for  enforcement  of smoke  regulation,  which include random highway smoke
tests with substantial penalties for failure.

     The Company has its platinum product  registered with the EPA for sale
in bulk diesel fuel and has registered  with the EPA two families of cerium
products under "grouping" provisions of additive registration  regulations.
Currently,  it can sell  the  individual  products  to all  on-highway  and
off-road  applications  under  these  registrations.  However,  the Company
believes  the price  and  performance  of its  bimetallic  additive  is far
superior to either additive alone.

     The Company is required to complete  engine tests in order to register
the  combined  additive so that it can be sold as a  composite  package and
also  before the  combined  product  can be sold by  refiners  or  additive
companies.  The  Company  can sell the two  separate  products  directly to
fleets and oil distributors for use together in commercial tests and trials
while  undergoing  registration  of the combined  product with the EPA. The
Company   expects  to  complete  these  engine  tests  and  the  subsequent
registration  of the  platinum/cerium  additive in  September or October of
1998.  Off-road  applications of the bimetallic additive do not require EPA
registration.

     The Company intends to launch the  platinum/cerium  additive under the
Platinum  Plus label to oil  distributors  and fleets in the second half of
1998 as well as to  off-road  applications.  The  Company  intends to use a
network  of  experienced  additive  sales/service  agents  to  reach  these
markets, as well as establish a distribution  network through the Company's
blenders.

PFC FOR GASOLINE

     In a cooperative  program with Holts, the Company developed a platinum
and rhodium bimetallic additive for gasoline.  The function of the additive
is to rejuvenate  an aged  catalytic  converter.  Tests were carried out at
Ricardo to evaluate  different additive  formulations.  The tests concluded
that the platinum/rhodium  additive improved the reductions in emissions of
HC, CO and NOx.  The  reduction  in tail pipe  emissions  after one tank of
treated  fuel were long lived (5,000  miles) with a gradual  fall-off of CO
reduction.

     Holts  subsequently  marketed  the  product in the U.K. in 1997 in the
consumer   aftermarket   through  auto  part   stores.   The  results  were
disappointing.  Holts reported that  consumers did not understand  what the
product  did and  indeed  few  consumers  knew if  their  cars  even  had a
catalytic  converter.  Test  marketing by Holts  concluded that the product
should be sold as a technical sale through service and repair shops.  Holts
is considering  how to better  reposition  the product.  The agreement with
Holts is  currently a  non-exclusive  agreement  for Europe and certain Far
East  markets and may be  terminated  at the  Company's  option after March
1999.

     The Company has interest from marketing and distribution companies for
the gasoline product in the U.S.  Management  estimates that the population
of cars with catalytic converters in the U.S. is approximately 140 million.
Since the implementation of enhanced  inspection and maintenance  programs,
data from two states indicates that 5%-15% of those cars tested are failing
inspection and maintenance  tests. This is expected to increase as enhanced
inspection  and  maintenance  programs  are fully  implemented  in  certain
states.

     In order to sell the  product in the U.S.,  the Company is required to
conduct  engine  tests that  register  the  product and apply for a waiver.
There is also a need to  demonstrate  the  effectiveness  of the product on
U.S.  vehicles  under  U.S.  test  standards.  The  Company  is  seeking to
establish a  cooperative  program with one or more  marketing  companies to
fund the test and  registration  program with a view toward  launching  the
product in the U.S. in the second half of 1999,  although no assurances can
be given in this regard.

TOTAL MARKET FOR PFC

     Management  believes the total  worldwide usage of diesel and gasoline
fuels is approximately 350 billion gallons per annum of which approximately
150 billion gallons are diesel and 200 billion gallons are gasoline.  Based
upon this estimation, at a projected treatment cost of two cents (U.S.) per
gallon of fuel treatment, 1% of the market represents a $70 million revenue
opportunity.

HEALTH EFFECTS AND THE USE OF METALLIC ADDITIVES

     Certain metallic additives have come under scrutiny for their possible
effects on health. While the platinum additive is already registered in the
U.S.  and did not strictly  need to be  registered  in Europe,  the Company
considered it prudent to take a much more  proactive  view.  Therefore,  in
1996, the Company began  discussions with the Ministry of Transport and the
Ministry of Health,  regulatory  authorities in the United Kingdom,  asking
for specific consent to the use of platinum metal additives in diesel fuel.
In December  1996,  the  following  response was  received  from the United
Kingdom  Ministry of Health's  committee on Toxicity:  "The  Committee  was
satisfied  that the platinum  emissions  from  vehicles  would not be in an
allergenic form and that the concentrations  were well below those known to
cause human  toxicity." In the U.S.,  the Company has completed  additional
engine testing to maintain its EPA registration as required of all fuel and
fuel additive manufacturers.

     The Company has applied for and received registration for two families
of cerium  additives.  It does not expect to have to carry out engine tests
since EPA rules allow that when a metallic  additive is  registered  by one
company and engine tests are filed by that  company,  often  companies  may
file using the same engine data (grouping  provisions)  subject to agreeing
upon  payment  terms with the original  registrant.  In the case of cerium,
Rhodia Rare Earths, a subsidiary of Rhodia S.A., has conducted engine tests
and  registered.  While the Company has not yet agreed to terms with Rhodia
Rare Earths, it expects to do so in the near term.

PLATINUM AND CERIUM

     The  Company  is  required  to  make a  separate  registration  of the
platinum/cerium  combination  before it can blend the two products and sell
it for bulk fuel  blending  for  on-highway  use.  The Company can sell the
products without the  registration  for off-road  applications and can sell
the platinum and cerium  separately,  for use  together,  to fleets and oil
distributors  on a trial basis,  but not to refiners or additive  blenders.
Thus,  the Company has  determined to make a separate  registration  and to
carry out the  engine  tests on the  combined  additives.  This  program is
expected to be completed by October 1998.

GASOLINE ADDITIVES - PLATINUM AND RHODIUM

     The Company  will be required to carry out an engine  test,  register,
and  apply  for a  waiver  in  order  to sell  this  product  into the U.S.
aftermarket.

NOX REDUCTION SYSTEMS AND ADDITIVES

     NOx  emissions  from diesel  engines  represent as much as half of the
emissions  from the  transport  sector  in some  parts  of the U.S.  Diesel
engines emit much more NOx than gasoline vehicles.  The catalytic converter
systems  used in  gasoline  engines  to  reduce  NOx do not work in  diesel
engines. This presents a great opportunity since, while much can be done by
engine  design  changes,  this is not  enough  for many  applications.  The
Company is working on two programs to commercialize NOx reduction systems.

NOX REDUCTION PRODUCT - ARIS(TM) 2000

     The  Company  has  developed  an  Advanced  Reagent  Injection  System
(ARIS(TM)  2000).  This  system  injects  reagent--typically  urea--over  a
catalyst in the exhaust  system of a diesel engine to achieve NOx reduction
of up to 90%.  The  complete  system  of  ARIS(TM)  2000 plus  catalyst  is
generally  called "urea SCR." SCR means Selective  Catalytic  Reduction,  a
process widely used to reduce NOx from gas turbines and furnaces.

     While SCR  systems  are  available  for diesel  engines,  the  current
systems  are  uneconomical,  often  costing  as  much  as the  engine.  The
challenge has been to develop a simple, reliable, low-cost injection system
that  can be  produced  with  typical  automotive  components  which  could
eventually be mass produced. The catalysts are similar to those used in gas
turbines and boilers and are already made by such catalyst manufacturers as
Engelhard Corporation, Johnson Matthey, Mitsubishi and Siemens.

     Current  regulations in California and the Northeast  states for large
stationary  diesel  engines sets NOx levels at a 50% to 90% reduction  from
normal levels  achieved  from current  production  engines under  federally
mandated Best Available Control  Technology  ("BACT") and Lowest Achievable
Emission Rate ("LAER")  requirements in ozone  non-attainment  areas.  Cost
effective systems are not yet available. As a result, gas engines are being
installed,  which cost more to buy and to run than the ARIS(TM)  2000.  The
Company intends to sell the ARIS(TM) 2000 to total system suppliers, engine
companies,  engine  distributors,  or the  assemblers of  generation  sets,
compressors, pumps, etc.

     Currently  the Company has a  cooperative-development  agreement  with
AMBAC, West Springfield,  MA, to develop the injectors used in the ARIS(TM)
2000 system. A prototype  system has been built and tested.  The next stage
will be to complete  detailed  engineering of the production unit and carry
out durability testing. The Company expects to carry out this next stage in
cooperation with a system supplier or catalyst supplier.  While the Company
is in discussions  with several  parties,  there can be no assurance that a
system  supplier will wish to cooperate in  commercializing  ARIS(TM) 2000,
nor that detailed engineering and durability tests will be successful.

NOXOUT(TM) 3200 SCR REAGENT

     The Company,  working in  conjunction  with Fuel Tech,  has  developed
proprietary  specifications  and formulations  for NOxOUT 3200 reagent,  an
aqueous blend of urea and corrosion  inhibitors for use with urea-based SCR
systems for diesels.  While  especially  effective  with the ARIS(TM)  2000
injection  system,  NOxOUT 3200 is also suited for use with other injection
systems and is under  evaluation by several  engine and catalyst  companies
investigating  its performance with their engines and catalysts.  As agreed
with Fuel Tech,  the Company  will market the NOxOUT 3200 reagent to engine
companies,  catalyst  companies and  end-users.  The Company will receive a
royalty  on  sales  of  NOxOUT  3200  by Fuel  Tech  urea  licensees  and a
commission  on the  specialty  component  sales  by Fuel  Tech to the  urea
licensees  involved in blending of NOxOUT 3200. The agreement  between Fuel
Tech and the  Company is  subject to  consummation  of  detailed  terms and
conditions  between the two parties regarding  duration,  responsibilities,
and other terms.

SOURCES OF SUPPLY

     The Company has  outsourcing  arrangements  with two  companies in the
precious metal refining industry and may make arrangements with others. The
Company has made the product  itself in the past but considers  outsourcing
to a precious  metal  refinery  to be more cost  effective.  The Company is
negotiating  for a  source  of  cerium  to  use in  its  bimetallic  diesel
additive.

RESEARCH AND DEVELOPMENT

     The  Company  employs  five  full-time   individuals,   including  two
executive  officers,  in engineering and product development as of the date
of this report.  During the years ended  December 31, 1995,  1996 and 1997,
and for the three  months ended March 31, 1998 the  Company's  research and
development  expenses  exclusive  of  patent  costs  totaled  approximately
$796,000,  $1,747,000,  $1,985,000 and $236,000,  respectively. The Company
expenses all development costs as incurred.

PROTECTION OF PROPRIETARY INFORMATION

     The  Company  holds  the  rights  to a number of  patents  and  patent
applications  pending.  There  can  be no  assurance  that  pending  patent
applications  will be  approved  or that  the  issued  patents  or  pending
applications will not be challenged or circumvented by competitors. Certain
critical technology  incorporated in the Company's products is protected by
trademark  and  trade  secret  laws  and   confidentiality   and  licensing
agreements.  There can be no  assurance  that such  protection  will  prove
adequate or that the Company will have adequate  remedies for disclosure of
its trade  secrets  or  violations  of its  intellectual  property  rights.

INSURANCE

     The Company maintains coverage for the customary risks inherent in its
operations.  Although  the Company  believes its  insurance  policies to be
adequate  in the  amount  and  coverage  for  its  current  operations,  no
assurance can be given that this coverage  will, in fact, be or continue to
be  available  in  adequate  amounts or at a  reasonable  cost or that such
insurance will be adequate to cover any future claims against the Company.

EMPLOYEES

     The Company has seven full-time employees.  In addition, two executive
officers of Fuel Tech provide  management,  administrative,  financial  and
legal  services  for the Company  pursuant  to a  Management  and  Services
Agreement  between  Fuel Tech and the Company on an  as-needed  basis.  The
Company  also  retains  four  outside  technical  consultants  on  specific
projects related to platinum, engines and NOx reduction.

FACILITIES

     The Company  leased for  administrative  purposes 2,900 square feet of
office  space at 300  Atlantic  Street,  Stamford,  Connecticut,  effective
February 1, 1996,  through  February 28, 1999.  Annual base rent under this
lease is $65,250.

PATENTS AND TECHNOLOGY ASSIGNMENTS

     The Company's technology is comprised of patents, patent applications,
trade or service marks, data and know-how.  This technology was acquired by
assignment from Fuel Tech or developed internally. The assignment agreement
provides for running  royalties of 2.5% of gross revenues  derived from the
sale of the PFC,  commencing in 1998 and  terminating  in 2008. The Company
may at any time terminate the royalty obligation by payment to Fuel Tech in
any year from 1998 through 2008 amounts,  depending on the year,  declining
from $12 million in 1998 to $1.1 million in 2008.  The  Company,  as owner,
maintains the technology at its expense.

     The Company currently has 12 U.S. and 38 International patents on PFCs
and NOx  reduction  systems  and has  another  83  U.S.  and  International
applications pending. These patents and patent applications cover the means
of  controlling  the four  principal  emissions  from diesel  engines (NOx,
particulates, CO and HC).

LEGAL PROCEEDINGS

     The Company is not involved in any legal proceedings.


                                 MANAGEMENT

DIRECTORS AND EXECUTIVE OFFICERS

     The directors and executive officers and key employees of the Company,
their positions held with the Company and their ages are as follows:

                   Name               Age               Position
                   ----               ---               --------

       Ralph E. Bailey               74    Chairman of the Board of
                                           Directors, Director

       Jeremy D. Peter-Hoblyn        58    President and Chief Executive
                                           Officer, Director

       James M. Valentine            44    Executive Vice President and Chief
                                           Operating Officer, Director

       Charles W. Grinnell           61    Vice President, General Counsel
                                           and Corporate Secretary, Director

       Scott M. Schecter             41    Vice President, Treasurer and
                                           Chief Financial Officer

       John A. de Havilland          60    Director

       Douglas G. Bailey             48    Director

     Directors  are  elected  each  year  for a  period  of one year at the
Company's  annual meeting of shareholders  and serve until their successors
are  duly  elected  by  the  shareholders.   Vacancies  and  newly  created
directorships  resulting  from any  increase  in the  number of  authorized
directors may be filled by a majority vote of the directors then in office.
Officers  are  elected  by,  and  serve at the  pleasure  of,  the Board of
Directors.  The Board has an Audit Committee comprised of Messrs.  Ralph E.
Bailey  and de  Havilland.  There are no other  committees  of the Board of
Directors.  Compensation  matters are determined by the full  membership of
the Board.

     The  following is a brief  summary of the  background of each director
and executive officer of the Company:

RALPH E. BAILEY

     Ralph E.  Bailey has been  Chairman of the Board and a director of the
Company  since July 1996.  He has been a director  and Chairman of American
Bailey  Corporation  ("ABC"),  a privately  owned business  acquisition and
development  company,  which owns a significant  equity stake in Fuel Tech,
since 1984. Mr. Bailey is the former Chairman and Chief  Executive  Officer
of Conoco, Inc. and a former Vice Chairman of E.I. du Pont de Nemours & Co.
Mr. Bailey is also a director and shareholder of Rowan Companies,  Inc. and
is Chairman of the Board,  Chief  Executive  Officer and a director of Fuel
Tech.

JEREMY D. PETER-HOBLYN

     Jeremy D.  Peter-Hoblyn  has been the  President  and Chief  Executive
Officer of the Company since its inception.  He also has been a director of
Fuel Tech since 1984 and was Chief  Executive  Officer of that company from
1993 to 1996.

JAMES M. VALENTINE

     James M.  Valentine  has  been  Executive  Vice  President  and  Chief
Operating Officer of the Company since its inception.  From the period 1990
through  1993,   Mr.   Valentine  was  the  head  of  his  own  energy  and
environmental  consulting  firm. Mr.  Valentine has been a director of Fuel
Tech since 1993.

CHARLES W. GRINNELL

     Charles W.  Grinnell  has been Vice  President,  General  Counsel  and
Corporate  Secretary of the Company  since its  inception  and has held the
same positions  with Fuel Tech since 1987. Mr.  Grinnell has been a partner
in the Stamford, Connecticut law firm of Huth & Grinnell, LLC since 1992.

SCOTT M. SCHECTER

     Scott M.  Schecter  has  served  as Vice  President,  Chief  Financial
Officer and  Treasurer of the Company and of Fuel Tech since  January 1994.
From June 1990 to January 1994, Mr.  Schecter was Senior Vice President and
Chief  Financial  Officer of American  Vision  Centers,  Inc. From May 1986
through June 1990, Mr. Schecter served as a corporate  development  officer
of W.R. Grace and Company.

JOHN A. DE HAVILLAND

     John A. de  Havilland  has been a director  of the  Company  since its
inception.  Mr. de Havilland was a director of J. Henry Schroder Wagg & Co.
Ltd.  from 1971 until his  retirement  in 1990 and a director  of Fuel Tech
from 1984 to 1998.

DOUGLAS G. BAILEY

     Douglas G. Bailey has been a director  of the Company  since March 31,
1998. Mr. Bailey, who is the son of Ralph E. Bailey, has been the President
and Chief  Executive  Officer of ABC since 1984. Mr. Bailey is Chairman and
Chief  Executive  Officer of Golden Casting  Corporation  and a Director of
DieselCast France S.A., both affiliates of ABC. Mr. Bailey is a director of
Fuel Tech.

EXECUTIVE COMPENSATION

     The table below sets forth  information  concerning  compensation  for
services in all  capacities  awarded to, earned by or paid to Mr. Jeremy D.
Peter-Hoblyn,   President  and  Chief  Executive  Officer,   Mr.  James  M.
Valentine, Executive Vice President and Chief Operating Officer and Eric N.
Balles, Vice President-Technology,  during the fiscal years ending December
31, 1995,  1996 and 1997,  the only  executive  officers of the Company who
earned total  compensation  in excess of $100,000  during  fiscal year 1997
(the "Named  Executive  Officers").  Mr.  Balles  resigned from the Company
effective  September 30, 1997.  Prior to August 1, 1996, for Mr.  Valentine
and  December  1,  1996,  for  Mr.  Peter-Hoblyn,  the  amounts  of  annual
compensation  shown  below  were  paid by Fuel  Tech and  allocated  to and
reimbursed by the Company to Fuel Tech.

<TABLE>
<CAPTION>
                         SUMMARY COMPENSATION TABLE
                                                                                  Long-Term
                                                                                  ---------
                                                                                   Shares
                                                                                  Underlying
                                                            Annual                 Options
Name and Principal Position            Year      Salary(FN1)      Other(FN2)      Granted (#)
- ---------------------------            ----      -----------      ----------      -----------
<S>                                    <C>        <C>               <C>              <C>   
Jeremy D. Peter-Hoblyn..............   1997       250,000           71,525           35,000
President and Chief                    1996       229,667           64,996               --
Executive Officer                      1995       162,500           35,500           17,200

James M. Valentine..................   1997       220,000           29,523           35,000
Executive Vice President               1996       209,833           26,727               --
and Chief Operating Officer            1995       165,000           24,923           10,000

Eric N. Balles......................   1997       120,000           12,625               --
Vice President-Technology              1996        56,910            4,776           25,000

- ----------------------
<FN>
(1)  Effective February 16, 1998, Mr. Peter-Hoblyn  voluntarily reduced his
     base  salary by  $62,500 to  $187,500.  Effective  July 1,  1988,  Mr.
     Peter-Hoblyn's  salary  reduction  became a deferral  of such  salary.
     Effective July 1, 1998, Messrs. Peter-Hoblyn and Valentine voluntarily
     reduced  their  salaries  by $10,000  each to $177,500  and  $210,000,
     respectively.  Reinstatement  of  the  $10,000  reduction  is  at  the
     discretion of the individual involved.

(2)  The  amounts  designated  "other"  in 1997,  1996  and  1995  include,
     respectively,  for  Mr.  Peter-Hoblyn,   pension  contributions  to  a
     purchased annuity of $45,200,  $45,833 and $32,500; for Mr. Valentine,
     401 (k) plan  contributions  of $9,550,  $8,793 and $7,313 and medical
     insurance premiums of $13,068,  $11,671 and $9,441; and for Mr. Balles
     medical insurance premiums of $9,475 and $3,376.

</FN>
</TABLE>

DIRECTORS' COMPENSATION

     The Company  provides an annual retainer of $15,000,  a meeting fee of
$2,000 per board  meeting and $1,000 per diem for  services  not  involving
board  meetings,  plus  associated  expenses  for  directors  who  are  not
employees of the Company.  Mr. Ralph E. Bailey,  however, is paid an annual
retainer  of  $15,000  and is  reimbursed  for his  expenses  of  attending
meetings and for office  expenses as Chairman of the Company.  Mr. Ralph E.
Bailey, commencing October 1997, Mr. de Havilland, commencing January 1998,
and Mr.  Douglas G. Bailey,  commencing in March 1998,  have deferred their
annual retainer  payments  pending  improvement in the Company's  financial
position. In addition, on June 5, 1998, the directors have elected to waive
their meeting fees pending improvement in the Company's financial position.
Where a  non-employee  director is employed or otherwise  compensated by an
affiliated  Company,  such as Fuel Tech,  the retainer and meeting fees are
paid to the affiliated  company,  unless  waived.  Fuel Tech was paid those
retainers  and fees for 1997 in the amount of  $56,850.  Directors  who are
employees  of the  Company  receive no  compensation  for their  service as
directors.

EMPLOYMENT AGREEMENTS

     Mr.  Peter-Hoblyn  has an employment  agreement with the Company which
provides that he will serve as the President and Chief Executive Officer of
the Company. Mr. Peter-Hoblyn's  employment agreement commenced on December
6, 1996 and continues  until  terminated by either party as described  more
fully  therein.  The  employment  agreement  provides for the payment of an
annual  base  salary  of  $250,000,   participation   in  benefit  programs
previously  extended to him by Fuel Tech or its  affiliates  (the Company's
predecessor) and payment of up to $50,000 for the annual premium for a U.K.
based  annuity (less any amounts  received  from the  Company's  benefit or
profit sharing plans).

     Mr.  Valentine  has an  employment  agreement  with the Company  which
provides  that he will  serve as the  Executive  Vice  President  and Chief
Operating  Officer of the Company.  Mr.  Valentine's  employment  agreement
commenced on August 1, 1996 and continues until  terminated by either party
as described more fully therein.  The employment  agreement provides for an
annual base salary of $220,000 and  participation in the Company's  benefit
plans.

     For a description of voluntary reductions by Messrs.  Peter-Hoblyn and
Valentine of their base salaries, see "Summary Compensation Table" above.

STOCK OPTION PLAN

     In 1994, the Board of Directors adopted and the shareholders  approved
the Company's 1994 Incentive Plan (the "Plan"). The Plan is intended to set
forth a flexible  structure  within  which the Company may utilize  various
compensation devices to recruit and retain the services of such key persons
as may be required to manage and carry out the Company's business.

     The Plan  provides  for the grant of options to  employees,  officers,
directors and  consultants  of the Company to purchase up to such number of
shares of Common  Shares as the Board of Directors  shall from time to time
determine,  provided  that such  shares in the  aggregate  shall not exceed
17.5% of the Company's issued and outstanding  shares.  At the date of this
Prospectus, 427,784 options under the Plan are outstanding.

     The Plan is designed so that awards  thereunder  may be settled in the
form of the Company's shares and in a manner complying with applicable U.S.
securities  laws.  Under  the  Plan,  the  Boards  of  Directors  may grant
incentive  awards  to  participants  in the  form  of  non-qualified  stock
options, stock appreciation rights,  restricted stock,  performance awards,
bonuses or any other form of share  based or  non-share  based award or any
combination  of  these  awards  (collectively  referred  to  herein  as the
"Award(s)").

     Share based Awards  shall at the time of grant have an exercise  price
of or be  valued  at not less  than  100% of the fair  market  value of the
shares on the date of the Award, as determined by the Administrator.

     Share based  Awards  shall be  outstanding  for a period of six months
prior to the exercise thereof or the receipt of benefits thereunder and may
not be outstanding for a period in excess of ten years.  Absent approval of
the Board of  Directors,  awards and  agreements  evidencing  Awards may be
assigned  or  transferred   only  pursuant  to  the  laws  of  descent  and
distribution,  and  during  the life of the  holder of an  Award,  only the
holder may exercise or receive the benefit of the Award.

OPTIONS GRANTED TO DATE UNDER THE PLAN

     The following table sets forth  information  concerning  stock options
granted from the inception of the Plan to date to those persons who are now
(i) the Named Executive  Officers,  (ii) all executive officers as a group,
(iii) each director,  (iv) all  non-executive  employees as a group and (v)
all employees,  including  executive officers as a group. On August 4, 1998
the closing price of the Company's  Common Shares was $1.88 per share.  All
stock options become exercisable upon a change of control as defined in the
Plan.

<TABLE>
<CAPTION>
                                                                       Number           Exercise            Expiration
                             Name                                    of Shares           Prices            Dates/Vesting
                             ----                                    ---------           ------            -------------
<S>                                                                    <C>                <C>                 <C>
Ralph E. Bailey..............................................          25,000             $4.50               2006(FN1)
                                                                        5,000             $4.625              2007(FN4)

Douglas G. Bailey............................................          15,000             $2.03               2008(FN4)

Eric N. Balles...............................................          25,000             $4.50               2006(FN5)

John A. de Havilland.........................................           7,500             $6.82               2005(FN2)
                                                                        5,000             $4.625              2007(FN4)

Charles W. Grinnell..........................................           6,250             $2.50               2002(FN2)
                                                                        5,750             $6.82               2005(FN2)
                                                                       10,000             $4.625              2007(FN4)
                                                                        7,500             $2.03               2008(FN4)

Jeremy D. Peter-Hoblyn.......................................          25,000             $0.20               2001(FN3)
                                                                       25,000             $2.00               2001(FN2)
                                                                       17,200             $6.82               2005(FN2)
                                                                       10,000             $4.625              2007(FN4)
                                                                       25,000             $4.625              2007(FN4)
                                                                        7,500             $2.03               2008(FN4)

James M. Valentine...........................................          25,000             $0.20               2001(FN2)
                                                                       25,000             $2.00               2001(FN2)
                                                                       10,000             $6.82               2005(FN2)
                                                                       10,000             $4.625              2007(FN4)
                                                                       25,000             $4.625              2007(FN4)
                                                                        7,500             $2.03               2008(FN4)

Executive officers as a group (four in number)...............         290,700        $0.20-$6.82      2001-2008(FN2)(FN3)(FN4)

All employees, including executive officers as a group                335,700        $0.20-$6.82      2001-2008(FN1)(FN2)(FN3)(FN4)
  (nine in number)...........................................

Non-executive employees as a group (five in number)..........          45,000        $2.03-$6.50      2002-2008(FN1)(FN4)

- ------------------------
<FN>
(1)  These options become first exercisable in three equal  installments on
     the first through the third anniversaries of grant.

(2)  These options are now vested and exercisable.

(3)  16,666 of these options were exercised in 1997 and the remaining 8,334
     shares are now exercisable.

(4)  These options become first exercisable in three equal  installments on
     the grant and on the first and second anniversaries of grant.

(5)  8,333 of these options are vested and exercisable,  the balance having
     been cancelled.

</FN>
</TABLE>

OPTION GRANTS IN THE LAST FISCAL YEAR

<TABLE>
<CAPTION>
                                                                                                    Potential Realizable
                                                                                                   Value of Assumed Annual
                                  Number of      % of Total                                         Rates of Stock Price
                                   Shares         Options                                         Appreciation for Option
                                 Underlying      Granted to     Exercise or                                 Term
                                   Options      Employees in    Base Price                                  ----
             Name                Granted (#)        1997          ($/Sh)      Expiration Date         5%           10%
             ----                -----------        ----          ------      ---------------         --           ---
<S>                              <C>                <C>           <C>         <C>                 <C>          <C>     
Jeremy D. Peter-Hoblyn.......       35,000           44%            $4.625         2/6/07         $102,000     $258,000
Eric N. Balles...............           --           --                --         --                 --          --
James M. Valentine...........       35,000           44%            $4.625         2/6/07         $102,000     $258,000

</TABLE>

AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
AND FISCAL YEAR END OPTION VALUES

<TABLE>
<CAPTION>
                                                          Number of        Number of
                                                         Securities        Securities        Value of          Value of
                                                         Underlying        Underlying       Unexercised      Unexercised
                                                         Unexercised      Unexercised      in-the-Money      in-the-Money
                                                         Options at        Options at       Options at        Options at
                                Shares                   Fiscal Year         Fiscal           Fiscal            Fiscal
                             Acquired on     Value          End/           Year End/         Year End/        Year End/
           Name               Exercises     Realized     Exercisable     Unexercisable      Exercisable     Unexercisable
           ----               ---------     --------     -----------     -------------      -----------     -------------
<S>                           <C>           <C>          <C>             <C>                <C>             <C>
Jeremy D.
Peter-Hoblyn...............     16,666      $50,832        62,200            23,334           $29,601             $0
James M. Valentine.........       0            $0          71,666            23,334           $66,900             $0
Eric N. Balles.............       0            $0           8,333              0                $0                $0

</TABLE>

                           PRINCIPAL SHAREHOLDERS

     The following  table sets forth  information  regarding the beneficial
ownership of Common  Shares as of June 30, 1998 by (i) each person known to
the Company to own  beneficially  more than five percent of the outstanding
Common Shares, (ii) each director of the Company, (iii) the named Executive
Officers, and (iv) all directors and executive officers as a group.


                                            Number of     Percentage of Class
                                             Shares                    After
                                          Beneficially      Before   Offering
Name and Address of Beneficial Owner         Owned         Offering    (FN1)
- ------------------------------------         -----         --------    -----
Fuel Tech (FN2).......................       689,147         27.4       16.5
Ralph E. Bailey (FN3)(FN4)............        26,666          1.1       (FN*)
Douglas G. Bailey (FN3)(FN4)..........         5,000         (FN*)      (FN*)
Eric N. Balles (FN3)..................         8,333         (FN*)      (FN*)
John A. de Havilland (FN3)............        10,833         (FN*)      (FN*)
Charles W. Grinnell (FN3).............        29,008          1.2       (FN*)
Jeremy D. Peter-Hoblyn (FN3)..........       121,918          4.8        2.9
James M. Valentine (FN3)..............        91,771          3.6        2.2
All Directors and Officers as a Group
  (seven persons) (FN3)...............       326,992         13.0        7.9

- ------------------------

*    Less than one percent (1.0%)

(1)  Assumes full subscription of the Rights Offering,  no participation by
     management  or Fuel Tech and that all  shares  of  Series B  Preferred
     Stock are immediately  converted into Common Shares. Fuel Tech and the
     directors and executive  officers have not yet determined whether they
     will participate in the Rights Offering. Fuel Tech and management will
     make a  determination  as to  whether  to  participate  in the  Rights
     Offering  after the  distribution  of the Rights  based  upon  several
     factors,  including the Offering  Price,  their  respective  financial
     resources and, in the case of Fuel Tech, applicable covenants.

(2)  The  address of Fuel Tech is  Castorweg  22-24,  Curacao,  Netherlands
     Antilles and the address of each other  beneficial  owner is c/o Clean
     Diesel Technologies,  Inc., Suite 702, 300 Atlantic Street,  Stamford,
     Connecticut 06901.

(3)  Includes shares subject to options exercisable presently and within 60
     days for Mr. Ralph E. Bailey,  11,666  shares;  Mr. Douglas G. Bailey,
     5,000  shares;  Mr.  Balles,  8,333 shares;  Mr. de Havilland,  10,833
     shares; Mr. Grinnell, 21,166 shares; Mr. Peter-Hoblyn,  76,366 shares;
     Mr. Valentine,  85,832 shares; and for all directors and officers as a
     group, 251,529 shares.

(4)  For the  description of ABC which is controlled by Messrs.  Ralph and
     Doug Bailey,  see "CERTAIN  RELATIONSHIPS AND RELATED  TRANSACTIONS --
     Relationship with Fuel Tech; Conflicts of Interest."

               CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

MANAGEMENT AND SERVICES AGREEMENT

     Effective  July 1995 and amended June 1996,  the Company and Fuel Tech
have entered into a Management and Services  Agreement (the "Management and
Services  Agreement")  under which Fuel  Tech's  corporate  staff  provides
certain administrative  services,  including legal advice, risk management,
tax advice and certain  technical  and other  services to the Company.  The
Company is assessed fees equal to, depending on the type of service,  3% or
10% of the Company's fixed reimbursable costs for these services. As of May
1998, the fee was fixed at 3% for all of the Company's  reimbursable costs.
The fee may be changed by mutual  agreement  of the  Company and Fuel Tech.
Management  believes  that the charges  under the  Management  and Services
Agreement are  reasonable and that the terms of the Management and Services
Agreement are fair to the Company.  The Management  and Services  Agreement
may be canceled by either party on or before May 15 in any year.

TECHNOLOGY ASSIGNMENTS

     The Company's technology is comprised of patents, patent applications,
trade or service marks,  data and know-how.  A substantial  portion of this
technology is held under  assignments of technology from Fuel Tech and Fuel
Tech affiliates.  The assignments  provide for running royalties payable to
Fuel  Tech  commencing  in  1998 of 2.5% of  gross  revenues  derived  from
platinum fuel catalysts.  The Company may at any time terminate the royalty
obligation  by payment to Fuel Tech in any year from 1998  through  2008 of
amounts,  depending on the year, declining from $12 million in 1998 to $1.1
million in 2008.

TERM LOAN

     Under an unsecured  promissory  note of November 5, 1997,  the Company
owes  approximately  $495,000 to Platinum Plus, Inc.  ("Platinum  Plus"), a
wholly owned subsidiary of Fuel Tech, repayable in installments of $100,000
on July 1 in each of the years 1998 through 2000 and approximately $195,000
on July 1, 2001,  bearing  interest at eight percent per annum.  On July 1,
1998,  Platinum  Plus  elected to defer the  repayment  of the  $100,000 of
principal  which was payable on that date.  Platinum  Plus has reserved the
right,  however,  to call this payment at any time.  As of the date of this
prospectus,  Platinum Plus has not demanded repayment. The interest accrued
on the  note as of July 1,  1998  was  paid  by the  Company.  See  "USE OF
PROCEEDS."

BRIDGE LOAN

     Fuel Tech and a group of London  based  investors  (the  "Bridge  Loan
Lenders")  executed a letter of intent  with the  Company  to  provide  the
Company  with a Bridge  Loan of $1.4  million at ten percent  interest  per
annum due April 15, 2001,  secured by all of the  intellectual  property of
the Company. A $500,000 short-term note and security agreement entered into
with Fuel Tech in  February  1998 was  canceled  and Fuel  Tech's  $500,000
portion of the Bridge Loan substituted for that instrument. The Bridge Loan
will, as a debt instrument and through its security interest,  be preferred
in liquidation over all other securities of the Company, debt or equity. No
class of debt  senior to the  Bridge  Loan may be issued  absent  the prior
consent of a majority in interest of the Bridge Loan Lenders.

     The Bridge Loan may be  converted  into up to 2,800 shares of Series A
Convertible Preferred Stock (the "Series A Preferred Stock") of the Company
at any time at the option of the Bridge Loan Lenders, but is required to be
converted  on  (i)  the  conclusion  of  a  public  or  private   financing
contributing $1.75 million of net proceeds to the Company (including, if it
meets this condition, the Rights Offering), or (ii) voluntary conversion of
60% of the Bridge Loan.

     John A. de  Havilland,  a director of the Company and of Fuel Tech, is
also a director  of The  Shimpling  Trust  Limited  which is a Bridge  Loan
Lender in the amount of $250,000.

TERMS OF SERIES A PREFERRED STOCK

     In connection  with the Company's  Bridge Loan,  the Board  designated
10,000 shares of Series A Preferred  Stock.  The Bridge Loan is convertible
into  the  Series  A  Preferred  Stock at the  lenders'  discretion  and is
mandatorily  convertible  upon  the  conclusion  of  a  public  or  private
financing  that  contributes  at least $1.75 million of net proceeds to the
Company.  Accordingly,  upon consummation of the Rights Offering,  assuming
subscription of at least 31,650 Rights pursuant to the Rights Offering at a
Subscription Price of $74.25 and estimated  Soliciting Fees and expenses of
$600,000,  the Bridge Loan Notes will be converted  into Series A Preferred
Stock.  Holders of the Bridge  Loan  Notes have  agreed not to convert  the
Bridge  Loan into  Series A  Preferred  Stock  prior to the  earlier of the
conclusion of a public or private financing that contributes at least $1.75
million of net proceeds to the Company  (including the Rights  Offering) or
January 31, 1999. See  "DESCRIPTION  OF CAPITAL STOCK -- Preferred Stock --
Series A Convertible Preferred Stock."

REGISTRATION RIGHTS

     The  Company  has  agreed  as  of  November  15,  1997  under  certain
circumstances  to provide  registration  rights to Fuel Tech for one demand
and  unlimited  incidental  registrations  at Company  cost for the sale of
Common  Shares held by Fuel Tech,  if such  registration  should be legally
required for Fuel Tech to sell such shares.

     The terms of the Bridge Loan provide that on  conversion of the Bridge
Loan Notes into Series A Preferred Stock, the holders of Series A Preferred
Stock may have three demand (each of $1 million in value and not more often
than one in any twelve months) and unlimited  incidental  registrations  at
Company cost for the Common Shares  underlying the Series A Preferred Stock
held by the holders,  if registration  should be legally  required for such
holders to sell such underlying Common Shares.

RELATIONSHIP WITH FUEL TECH; CONFLICTS OF INTEREST

     Directors and officers of Fuel Tech and its  subsidiaries who are also
directors  and  officers  of the  Company,  and Fuel Tech as the  Company's
controlling  shareholder,  are in positions  involving the  possibility  of
conflicts of interest with respect to transactions involving the Company.

     The Company and Fuel Tech have entered into  contractual  arrangements
governing  certain  transactions  and  relationships  between  them.  These
agreements were executed while the Company was a subsidiary or affiliate of
Fuel  Tech  and  were  not  the   result  of   arm's-length   negotiations.
Accordingly,  there is no assurance  that the terms and conditions of these
agreements are as favorable to the Company as might have been obtained from
independent third parties.

     Six of the Company's  officers or directors are employees or directors
to the Board of Fuel Tech. Three of these persons are also officers of Fuel
Tech and Fuel Tech subsidiaries. Although these persons seek to devote such
time to the affairs of the Company as the  Company's  needs  require,  they
must balance the Company's  need for their time with the needs of Fuel Tech
and its subsidiaries.

     Ralph E. Bailey and Douglas G. Bailey were elected Managing  Directors
of  Fuel  Tech  which  currently  owns  27.4  percent  of  the  issued  and
outstanding Common Shares of the Company. Pursuant to a Securities Purchase
Agreement  dated as of March 23, 1998 (the "Purchase  Agreement"),  certain
affiliates  and related  parties of ABC (the  "Investors")  purchased  4.75
million common shares of Fuel Tech and warrants to purchase an additional 3
million of such common  shares.  Under the terms of a related  shareholders
agreement, the Investors, for a period of ten years and so long as they own
not less than a certain  specified  minimum  percentage  of the  issued and
outstanding  common shares of Fuel Tech, will be entitled from time to time
to nominate two Managing Directors of Fuel Tech who are  representatives of
the Investors and one independent  director.  Also, during such period, the
Investors  will be entitled to nominate up to 50% of the  directors of Fuel
Tech, Inc., the operating  subsidiary of Fuel Tech which owns substantially
all of the operating assets of the Fuel Tech Group.

     The Company  expects to resolve  potential  conflicts of interest with
Fuel Tech on a  case-by-case  basis,  taking  into  consideration  relevant
factors including its existing agreements with Fuel Tech,  applicable stock
exchange rules and prevailing corporate practices.  Fuel Tech, however, may
exercise its influence in its own best interests.

NOXOUT(TM) 3200 SCR REAGENT

     For a description  of  arrangements  between the Company and Fuel Tech
regarding the development of proprietary  specifications  and  formulations
for NOxOUT 3200 SCR Reagent, see "BUSINESS -- NOxOUT(TM) 3200 SCR Reagent."

                        DESCRIPTION OF CAPITAL STOCK

     The following  summary  description of the Company's  capital stock is
qualified  in its entirety by reference  to the  Company's  Certificate  of
Incorporation,  as amended, the Certificate of Designation for the Series A
Preferred  Stock and the form of the  Certificate  of  Designation  for the
Series  B  Preferred   Stock,   which  are  attached  as  exhibits  to  the
Registration Statement.

COMMON SHARES

     The Company is  authorized to issue up to  15,000,000  Common  Shares,
$0.05 par value per  share.  As of the date of this  Prospectus,  2,516,666
Common Shares are issued and outstanding.

     Holders of Common  Shares are entitled to one vote for each share held
of record on each matter submitted to a vote of  shareholders.  There is no
cumulative voting for election of Directors. Subject to the prior rights of
any series of preferred  stock which may from time to time be  outstanding,
if any, Holders of Common Shares are entitled to receive ratably  dividends
when,  as, and if declared by the Board of Directors,  out of funds legally
available therefor and, upon the liquidation, dissolution, or winding up of
the Company,  are entitled to share ratably in all assets  remaining  after
payment of  liabilities  and payment of accrued  dividends and  liquidation
preferences on the Preferred  Stock, if any.  Holders of Common Shares have
no preemptive rights and have no rights to convert their Common Shares into
any other  securities.  The  outstanding  Common Shares are, and the Common
Shares to be outstanding  upon completion of this Offering will be, validly
authorized and issued, fully paid, and nonassessable.

PREFERRED STOCK

     The Company is authorized  to issue up to 100,000  shares of preferred
stock, $0.05 par value per share (the "Preferred Stock").

     The Preferred Stock may be issued in one or more series,  the terms of
which may be  determined at the time of issuance by the Board of Directors,
without  further  action by  shareholders,  and may include  voting  rights
(including  the  right  to  vote  as  a  series  on  particular   matters),
preferences as to dividends and liquidation,  conversion rights, redemption
rights, and sinking fund provisions.

SERIES A CONVERTIBLE PREFERRED STOCK

     On March 31, 1998, the Board of Directors designated 100,000 shares as
Series A  Convertible  Preferred  Stock,  $0.05 par  value  per share  (the
"Series A Preferred Stock").

RANKING

     Upon liquidation, dissolution and winding up, proceeds are distributed
to holders of Series A Preferred  Stock and Series B Preferred  Stock,  pro
rata,  based on the original  issue price of such shares,  and prior to the
Holders of Common Shares.

DIVIDENDS

     Holders of the Series A Preferred Stock are entitled to receive, when,
as and if  declared by the Board of  Directors  out of funds of the Company
legally available therefor,  cash dividends at the annual rate of 9% of the
$500.00  per  share  price and  liquidation  preference  (the  "Liquidation
Preference");  provided, however, that in lieu of making dividends in cash,
the  Company  may elect,  by giving  written  notice to each  holder of the
Series A Preferred  Stock,  to pay  dividends in kind at the annual rate of
11% of the Liquidation Preference (cash dividends and dividends in kind are
each deemed "Preferred Dividends"). Dividends payable to the holders of the
Series A Preferred  Stock are payable  quarterly  in arrears,  on the first
business  day of January,  April,  July and October of each year (each such
date  being  hereinafter   referred  to  as  a  "Dividend  Payment  Date"),
commencing  July 1,  1998.  Preferred  Dividends  on  shares  of  Series  A
Preferred  Stock  shall be  cumulative  and shall  accrue  from the date of
original issuance.

VOTING RIGHTS

     Holders of the Series A  Preferred  Stock are  entitled to vote on all
matters  as a class  with the  holders  of the  Common  Shares and Series B
Preferred  Stock and in such event are entitled to one vote for each Common
Share into which the Series A Preferred Stock is  convertible.  The holders
of Series A Preferred Stock are entitled to vote as a separate class on the
election of two directors.  In addition,  the approval of the holders of at
least 60  percent of the shares of Series A  Preferred  Stock,  voting as a
separate class, will be required to: (i) amend, alter, or repeal any of the
provisions of the Certificate of  Incorporation  so as to affect  adversely
the powers,  preferences or rights of the holders of the shares of Series A
Preferred  Stock  then  outstanding  or  reduce  the  minimum  time for any
required  notice to which the  holders of the shares of Series A  Preferred
Stock then  outstanding  may be  entitled;  (ii)  authorize  or create,  or
increase the  authorized  amount of, any  securities  ranking senior to the
shares of Series A Preferred  Stock or any  securities  that by their terms
rank pari passu with the shares of Series A Preferred  Stock,  either as to
the payment of dividends or the  distribution  of assets upon  liquidation,
dissolution  or winding up of the Company;  (iii)  authorize the payment of
dividends on the Common Shares;  (iv) repurchase any Common Shares,  except
in connection  with the termination of employment of a holder of such stock
or  otherwise  pursuant  to  the  terms  of  the  Plan;  (v)  enter  into a
transaction whose  consummation  results in a Change of Control (as defined
in the  Certificate  of  Designation)  of the  Company;  (vi)  authorize or
create,  or increase the number of authorized  shares of Series A Preferred
Stock; or (vii) other than to add two additional  board seats in connection
with the initial issuance of Series A Preferred Stock, increase the size of
the Board of Directors of the Company.

REDEMPTIONS AND CONVERSIONS

     The shares of Series A  Preferred  Stock  shall be  redeemable  at the
option of a holder of the Series A  Preferred  Stock,  in whole or in part,
from time to time out of funds legally  available for such purpose,  at any
time, on or after the fourth  anniversary  of the date of execution of this
Certificate of  Designation  at the  redemption  price of $500.00 per share
(which  conversion  price  will be deemed to have been paid in full,  at no
extra  cost to the  holder  thereof,  with the  tendering  of the  Series A
Preferred Stock in connection with the conversion  thereof),  plus, in each
case, an amount equal to all dividends  accrued and unpaid on the shares of
Series A  Preferred  Stock up to the date fixed for the  redemption  as set
forth in the Certificate of Designation.

     Shares of Series A Preferred Stock are convertible (at the Liquidation
Preference of $500.00 per share), in whole or in part, at the option of the
holders thereof ("Optional  Conversion"),  unless previously redeemed, into
Common Shares at a conversion  price of $1.50 per Common Share  (equivalent
to a  conversion  rate of 333.33  Common  Shares for each share of Series A
Preferred  Stock so converted),  which  conversion  price will be deemed to
have been paid in full,  at no extra cost to the holder  thereof,  with the
tendering of the Series A Preferred Stock in connection with the conversion
thereof,  subject  to  adjustment  as  set  forth  in  the  Certificate  of
Designation.

     The  Company  can force the holder to convert  his Series A  Preferred
Stock,  in whole or in part, into Common Shares at any time on or after the
date that the  average  Closing  Price (as  defined in the  Certificate  of
Designation)   of  the  Common  Shares  equals  or  exceeds  $4.50  for  20
consecutive  Trading  Days.  Such  conversion  may at the  election  of the
holders  of 60% of the  issued  and  outstanding  shares  of the  Series  A
Preferred  Stock be scheduled to occur,  on a pro rata basis quarterly over
18 months.

     Subject to the provision for adjustment  set forth in the  Certificate
of   Designation,   each  share  of  Series  A  Preferred  Stock  shall  be
automatically  converted  into a number of Common Shares at the  conversion
price set forth in the  Certificate  of  Designation  in the event that the
Company  consummates  the  sale  of  Common  Shares  in a bona  fide,  firm
commitment,   underwritten   public  offering   pursuant  to  an  effective
registration  statement  under  the  Securities  Act of 1933,  as  amended,
resulting in at least $10,000,000 of gross proceeds at a price per share of
at least 200% of the  Conversion  Price  being  received  by the Company (a
"Qualified  IPO"). In the event of such mandatory  conversion,  accrued and
unpaid dividends will also convert into Common Shares, on the same terms as
the underlying Series A Preferred Stock.

ANTI-DILUTION

     In the event that additional  Common Shares or securities  exercisable
or convertible into Common Shares are issued without  consideration or at a
price less than the applicable  conversion price for the Series A Preferred
Stock in effect on the date of and immediately  prior to such issue,  then,
subject to  certain  exceptions,  the  applicable  conversion  price of the
Series A Preferred Stock shall be reduced, concurrently with such issue, to
a price determined by multiplying such conversion price by a fraction,  the
numerator  of which  shall  be the  number  of  Common  Shares  outstanding
immediately  prior to such issue plus the number of shares of Common Shares
which the  aggregate  consideration  received  by the Company for the total
number  of  additional  Common  Shares  so issued  would  purchase  at such
conversion  price;  and the  denominator  of which  shall be the  number of
shares of Common Shares  outstanding  immediately  prior to such issue plus
the number of such additional Common Shares so issued.

LIQUIDATION

     In the event of any voluntary or involuntary liquidation, dissolution,
or winding up of the  Company,  and subject to the rights of holders of any
other  series of  Preferred  Stock,  the holders of  outstanding  shares of
Series A  Preferred  Stock are  entitled  to receive the sum of $500.00 per
share in cash for each share of Series A Preferred Stock,  plus accrued and
unpaid  Preferred  Dividends  thereon,  out of the  assets  of the  Company
available for  distribution  to  stockholders,  before any  distribution of
assets is made to  holders  of Common  Shares  or any other  capital  stock
ranking  junior to the  shares of Series A  Preferred  Stock and pari passu
with holders of Series B Preferred Stock upon liquidation,  dissolution, or
winding up. If, upon any voluntary or involuntary liquidation, dissolution,
or winding up of the Company, the assets of the Company are insufficient to
permit the payment of the full preferential amounts payable with respect to
the shares of Series A Preferred  Stock, the Holders shall share ratably in
any  distribution  of  assets  of the  Company  in  proportion  to the full
respective preferential amounts to which they are entitled, in each case on
a per share  basis.  After  payment of the full  amount of the  liquidating
distribution to which they are entitled,  the holders shall not be entitled
to any further  participation in any distribution of assets by the Company.
A  consolidation  or merger of the  Company  with or into one or more other
Companies  (whether  or not  the  Company  is the  Company  surviving  such
consolidation  or  merger),  or  a  sale,  lease  or  exchange  of  all  or
substantially all of the assets of the Company, shall not be deemed to be a
voluntary or  involuntary  liquidation,  dissolution,  or winding up of the
Company.

SERIES B CONVERTIBLE PREFERRED STOCK

     In  connection  with the  Rights  Offering,  the  Board  of  Directors
designated 50,000 shares as Series B Convertible Preferred Stock, $0.05 par
value per share (the "Series B Preferred Stock").

RANKING

     Upon liquidation, dissolution and winding up, proceeds are distributed
to holders of Series A Preferred  Stock and Series B Preferred  Stock,  pro
rata,  based on the original  issue price of such shares,  and prior to the
holders of Common Shares.

DIVIDENDS

     Holders of the Series B Preferred Stock are entitled to receive, when,
as and if  declared by the Board of  Directors  out of funds of the Company
legally available therefor,  cash dividends at the annual rate of 9% of the
$________  per share price and  liquidation  preference  (the  "Liquidation
Preference");  provided, however, that in lieu of making dividends in cash,
the  Company  may elect,  by giving  written  notice to each  holder of the
Series B Preferred  Stock,  to pay  dividends in kind at the annual rate of
11% of the Liquidation Preference (cash dividends and dividends in kind are
each deemed "Preferred Dividends"). Dividends payable to the holders of the
Series B Preferred  Stock are payable  quarterly  in arrears,  on the first
business  day of January,  April,  July and October of each year (each such
date  being  hereinafter   referred  to  as  a  "Dividend  Payment  Date"),
commencing  January  1,  1999.  Preferred  Dividends  on shares of Series B
Preferred  Stock  shall be  cumulative  and shall  accrue  from the date of
original issuance.

VOTING RIGHTS

     Holders of the Series B  Preferred  Stock are  entitled to vote on all
matters  as a class  with the  holders  of the  Common  Shares and Series A
Preferred  Stock and in such event are entitled to one vote for each Common
Share into which the Series B Preferred Stock is convertible.

CONVERSIONS

     Shares of Series B Preferred Stock are convertible (at the Liquidation
Preference of $______ per share), in whole or in part, at the option of the
holders thereof ("Optional Conversion"), into Common Shares at a conversion
price of $____ per Common  Share  (equivalent  to a  conversion  rate of 33
Common  Shares for each share of Series B  Preferred  Stock so  converted),
which  conversion  price  will be deemed  to have been paid in full,  at no
extra  cost to the  holder  thereof,  with the  tendering  of the  Series A
Preferred  Stock in  connection  with the  conversion  thereof,  subject to
adjustment as set forth in the Certificate of Designation.

     The  Company  can force the holder to convert  his Series B  Preferred
Stock,  in whole or in part, into Common Shares at any time on or after the
date that the  average  Closing  Price (as  defined in the  Certificate  of
Designation)   of  the  Common  Shares  equals  or  exceeds  $4.50  for  20
consecutive Trading Days.

     Subject to the provision for adjustment  set forth in the  Certificate
of Designation  which will be filed with the Secretary of State immediately
prior to the  consummation  of the sale of the  Series  B  Preferred  Stock
offered   hereby,   each  share  of  Series  B  Preferred  Stock  shall  be
automatically  converted  into a number of Common Shares at the  conversion
price set forth in the  Certificate  of  Designation  in the event that the
Company  consummates  the  sale  of  Common  Shares  in a bona  fide,  firm
commitment,   underwritten   public  offering   pursuant  to  an  effective
registration  statement  under  the  Securities  Act of 1933,  as  amended,
resulting in a Qualified  IPO. In the event of such  mandatory  conversion,
accrued and unpaid  dividends will also convert into Common Shares,  on the
same terms as the underlying Series B Preferred Stock.

ANTI-DILUTION

     In the event that additional  Common Shares or securities  exercisable
or convertible into Common Shares are issued without  consideration or at a
price less than the applicable  conversion price for the Series B Preferred
Stock in effect on the date of and immediately  prior to such issue,  then,
subject to  certain  exceptions,  the  applicable  conversion  price of the
Series B Preferred Stock shall be reduced, concurrently with such issue, to
a price determined by multiplying such conversion price by a fraction,  the
numerator  of  which  shall  be the  number  of  shares  of  Common  Shares
outstanding  immediately  prior to such  issue plus the number of shares of
Common Shares which the aggregate consideration received by the Company for
the total number of additional  Common  Shares so issued would  purchase at
such conversion  price; and the denominator of which shall be the number of
Common Shares  outstanding  immediately prior to such issue plus the number
of such additional Common Shares so issued.

LIQUIDATION

     In the event of any voluntary or involuntary liquidation, dissolution,
or winding up of the  Company,  and subject to the rights of holders of any
other  series of  Preferred  Stock,  the holders of  outstanding  shares of
Series B  Preferred  Stock are  entitled  to receive the sum of $______ per
share in cash for each share of Series B Preferred Stock,  plus accrued and
unpaid  Preferred  Dividends  thereon,  out of the  assets  of the  Company
available for  distribution  to  stockholders,  before any  distribution of
assets is made to  holders  of Common  Shares  or any other  capital  stock
ranking  junior to the  shares of Series B  Preferred  Stock and pari passu
with holders of Series A Preferred Stock upon liquidation,  dissolution, or
winding up. If, the assets of the Company  are  insufficient  to permit the
payment of the full preferential amounts payable with respect to the shares
of Series B Preferred  Stock under such  circumstances,  the Holders  shall
share ratably in any distribution of assets of the Company in proportion to
the full  respective  preferential  amounts to which they are entitled,  in
each case on a per share  basis.  After  payment of the full  amount of the
liquidating  distribution to which they are entitled, the holders shall not
be entitled to any further  participation  in any distribution of assets by
the Company.  A consolidation  or merger of the Company with or into one or
more other Companies,  or a sale, lease or exchange of all or substantially
all of the assets of the Company,  shall not be deemed to be a voluntary or
involuntary liquidation, dissolution, or winding up of the Company.

     Certificates  representing  shares of Series B  Preferred  Stock  will
include a legend to the effect that such  securities may not be transferred
to any resident of any of the following states: Arizona,  Florida, Georgia,
Ohio, Pennsylvania or Texas.

                      SHARES ELIGIBLE FOR FUTURE SALE

     The Company  currently has 2,516,666 Common Shares  outstanding.  Upon
completion of this Offering (assuming full subscription),  the Company will
have  Series A and  Series B  Preferred  Stock  outstanding  which  will be
convertible   into  933,324  and  1,650,000   additional   Common   Shares,
respectively.  The Common Shares  underlying the Series B Preferred  Stock,
except for certain shares owned by  "affiliates,"  including Fuel Tech, are
or  will  be  freely  tradable  without  further   registration  under  the
Securities Act.

     In  general,  under  Rule 144 as  currently  in  effect,  a person (or
persons whose shares are aggregated),  including a person who may be deemed
to be an  "affiliate"  of the  Company  as that term is  defined  under the
Securities  Act,  will be entitled to sell within any three month  period a
number of shares  beneficially  owned for one year that does not exceed the
greater  of (i) 1% of the  then  outstanding  Common  Shares,  or (ii)  the
average weekly trading volume in the Common Shares during the four calendar
weeks preceding such sale. Sales under Rule 144 are also subject to certain
requirements  as to the manner of sale,  notice,  and the  availability  of
current public information about the Company.  However, a person who is not
deemed  to  have  been  an  affiliate  of the  Company  during  the 90 days
preceding a sale by such  person,  and who has  beneficially  owned  Common
Shares for two years,  may sell such shares  without  regard to the volume,
manner of sale, or notice requirements of Rule 144.

     Following  this Offering,  the Company  cannot predict the effect,  if
any, that sales of Common Shares pursuant to Rule 144 or otherwise,  or the
availability  of such  shares  for  sale,  will  have on the  market  price
prevailing  from  time  to  time.   Nevertheless,   sales  by  the  current
shareholders  of substantial  amounts of Common Shares in the public market
could adversely affect  prevailing  market prices for the Common Shares. In
addition,  the  availability  for sale of a  substantial  amount  of Common
Shares acquired through the Rights could adversely affect prevailing market
prices for the Common Shares.

                            PLAN OF DISTRIBUTION

DISTRIBUTION ARRANGEMENTS

     Outside  of the  United  States,  and in  Colorado,  Connecticut,  the
District of Columbia,  Maryland,  New Jersey and New York, the Company will
pay  to  broker-dealers  registered  or  exempt  from  registration  in the
relevant  jurisdiction a fee for their soliciting  efforts (the "Soliciting
Fees").  Ten  percent  of the  Subscription  Price  paid  for the  Series B
Preferred   Stock   which   is   subscribed   for  will  be  paid  to  such
broker-dealers.   The  Soliciting   Fees  will  be  paid  directly  to  the
broker-dealer   designated  on  the   applicable   portion  of  the  Rights
Certificate.  Soliciting Fees will not be paid on any undesignated exercise
of Rights,  to any broker-dealer not registered or exempt from registration
in the relevant  jurisdiction,  or in the United States except with respect
to subscriptions by Holders in the states listed above.

TRANSFER AGENT

     The Company has appointed ChaseMellon Shareholder Services,  L.L.C. as
Transfer Agent for its Common Shares.


                               LEGAL MATTERS

     The validity of the Securities  offered hereby will be passed upon for
the Company by the law firm of Fried, Frank, Harris,  Shriver & Jacobson (a
partnership including professional corporations), New York, NY.

                                  EXPERTS

     The  financial  statements  of  Clean  Diesel  Technologies,  Inc.  at
December  31, 1996 and 1997,  and for each of the three years in the period
ended  December 31,  1997,  and for the period from January 1, 1992 through
December 31, 1997, appearing in this Prospectus and Registration  Statement
have been audited by Ernst & Young LLP, independent  auditors, as set forth
in their report thereon (which contains an explanatory paragraph describing
conditions  that raise  substantial  doubt about the  Company's  ability to
continue as a going concern as described in Note 1 to the Annual  Financial
Statements)  appearing  elsewhere herein, and are included in reliance upon
such report given upon the  authority of such firm as experts in accounting
and auditing.


INDEX TO FINANCIAL STATEMENTS                                             PAGE
- -----------------------------                                             ----

Audited Financial Statements
Report of Independent Auditors............................................ F-2
Balance Sheets as of December 31, 1996, and 1997.......................... F-3
Statements of Operations for the years ended
  December 31, 1995, 1996, and 1997 and for the period from
  January 1, 1992, through December 31, 1997.............................. F-4
Statements of Changes in Shareholders' Equity (Deficiency) for
  the years ended December 31, 1995, 1996, and 1997....................... F-5
Statements of Cash Flows for the years ended December 31, 1995,
  1996, and 1997 and for the period from January 1, 1992,
  through December 31, 1997............................................... F-6
Notes to Financial Statements............................................. F-7

Unaudited Interim Financial Statements
Balance Sheet as of March 31, 1998 (unaudited)............................ F-14
Statements of Operations for the three months ended
  March 31, 1997, and 1998, and for the period from
  January 1, 1992, through March 31, 1998 (unaudited)..................... F-15
Statements of Cash Flows for the three months ended
  March 31, 1997, and 1998, and for the period from January 1, 1992,
  through March 31, 1998 (unaudited)...................................... F-16
Note to Financial Statements (unaudited).................................. F-17

                       REPORT OF INDEPENDENT AUDITORS

The Board of Directors and Stockholders
Clean Diesel Technologies, Inc.

We  have  audited  the   accompanying   balance   sheets  of  Clean  Diesel
Technologies,  Inc. (a  development-stage  company) as of December 31, 1996
and 1997, and the related  statements of operations,  shareholders'  equity
(deficiency),  and cash  flows  for each of the three  years in the  period
ended  December 31, 1997 and for the period from  January 1, 1992,  through
December 31, 1997. These financial statements are the responsibility of the
Company's management.  Our responsibility is to express an opinion on these
financial statements based on our audits.

We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those  standards  require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material  misstatement.  An audit includes  examining,  on a test basis,
evidence   supporting   the  amounts  and   disclosures  in  the  financial
statements. An audit also includes assessing the accounting principles used
and  significant  estimates made by  management,  as well as evaluating the
overall  financial  statement  presentation.  We  believe  that our  audits
provide a reasonable basis for our opinion.

In our opinion,  the financial statements referred to above present fairly,
in  all  material   respects,   the  financial  position  of  Clean  Diesel
Technologies,  Inc. at December  31, 1996 and 1997,  and the results of its
operations  and its cash  flows for each of the three  years in the  period
ended December 31, 1997,  and for the period from January 1, 1992,  through
December  31,  1997,  in  conformity  with  generally  accepted  accounting
principles.

The  accompanying  financial  statements have been prepared  assuming Clean
Diesel  Technologies,  Inc. will continue as a going concern. As more fully
described in Note 1, the Company has incurred  recurring  operating  losses
and its operations have not produced a positive cash flow. These conditions
raise  substantial doubt about the Company's ability to continue as a going
concern. (Management's plans as to these matters are also described in Note
1.) The financial  statements do not include any adjustments to reflect the
possible future effects on the  recoverability and classification of assets
or the amounts and  classifications of liabilities that may result from the
outcome of this uncertainty.

                                          /s/  ERNST & YOUNG LLP

Stamford, Connecticut
February 26, 1998


CLEAN DIESEL TECHNOLOGIES, INC. (A DEVELOPMENT-STAGE COMPANY)

<TABLE>
<CAPTION>

BALANCE SHEETS
(IN THOUSANDS EXCEPT SHARE DATA)
                                                                                DECEMBER 31
                                                                       ------------------------------
                                                                         1996                  1997
                                                                       --------              --------
<S>                                                                   <C>                   <C>      
ASSETS
CURRENT ASSETS:
Cash and cash equivalents....................................         $   3,270             $   1,239
Short-term investments.......................................             2,000                    --
Inventories..................................................               103                   205
OTHER CURRENT ASSETS.........................................               222                   238
                                                                      ---------             ---------
Total current assets.........................................             5,595                 1,682
Other assets.................................................                82                    68
                                                                      ---------             ---------

TOTAL ASSETS                                                          $   5,677             $   1,750
                                                                      =========             =========

LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
Accounts payable and accrued expenses........................         $     741             $     794
Loan payable to Fuel-Tech N.V................................               745                   100
                                                                      ---------             ---------

TOTAL CURRENT LIABILITIES....................................             1,486                   894

LOAN PAYABLE TO FUEL-TECH N.V.                                               --                   395

SHAREHOLDERS' EQUITY:
Preferred Stock, par value $0.05 per share, authorized
   100,000 shares, no shares issued and outstanding..........                --                    --
Common Shares, par value $0.05 per share, authorized
   5,000,000 shares, issued and outstanding 2,500,000 and
   2,516,666 shares..........................................               125                   126
Additional paid-in capital...................................            11,155                11,188
Deficit accumulated during development stage.................            (7,089)              (10,853)
                                                                      ---------             ---------

TOTAL SHAREHOLDERS' EQUITY...................................             4,191                   461
                                                                      ---------             ---------

TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY...................         $   5,677             $   1,750
                                                                      =========             =========
See accompanying notes.

</TABLE>
CLEAN DIESEL TECHNOLOGIES, INC. (A DEVELOPMENT-STAGE COMPANY)
<TABLE>
<CAPTION>

STATEMENTS OF OPERATIONS
(IN THOUSANDS EXCEPT PER SHARE DATA)
                                                                                                                       
                                                                                                            Period from
                                                                                                            January 1,
                                                                                                               1992,  
                                                         For the years ended December 31                      through  
                                                  -------------------------------------------------        December 31,
                                                    1995                1996                1997                1997
                                                  ---------           ---------           ---------           ---------
<S>                                               <C>                 <C>                 <C>                 <C>      
Sales..................................           $      --           $      --           $     199           $     199
Costs and expenses:
Cost of sales..........................                  --                  --                 132                 132
General and administrative.............                 963               1,842               1,730               5,042
Research and development...............                 796               1,747               1,985               5,317
Patent filing and maintenance..........                 199                 223                 237                 938
                                                  ---------           ---------           ---------           ---------

Loss from operations...................               1,958               3,812               3,885              11,230
Interest income........................                 (33)               (383)               (165)               (581)
Interest expense to Fuel-Tech N.V......                  99                  60                  44                 204
                                                  ---------           ---------           ---------           ---------

NET LOSS DURING DEVELOPMENT STAGE                 $   2,024           $   3,489           $   3,764           $  10,853
                                                  =========           =========           =========           =========

BASIC AND DILUTED LOSS PER COMMON SHARE
                                                  $    0.81           $    1.40           $    1.50                 N/A
                                                  =========           =========           =========           =========

AVERAGE NUMBER OF COMMON SHARES OUTSTANDING           2,500               2,500               2,517                 N/A
                                                  =========           =========           =========           =========

See accompanying notes.

</TABLE>

CLEAN DIESEL TECHNOLOGIES, INC. (A DEVELOPMENT-STAGE COMPANY)

<TABLE>
<CAPTION>

STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIENCY)
(IN THOUSANDS)
                                                                                               Deficit
                                                                                               Deficit              
                                                                                              Accumulated        Total   
                                                     Common Shares             Additional       During       Shareholders'
                                                -------------------------       Paid-In       Development       Equity
                                                 Shares          Amount         Capital         Stage        (Deficiency)
                                                ---------       ---------       ---------      ---------       ---------
<S>                                             <C>             <C>             <C>            <C>             <C>       
BALANCE AT JANUARY 1, 1995.................         2,500       $     125       $     594      $  (1,576)      $    (857)
Net loss for year..........................            --              --              --         (2,024)         (2,024)
Fuel-Tech N.V. capital contribution........            --              --          10,531             --          10,531
                                                ---------       ---------       ---------      ---------       ---------

BALANCE AT DECEMBER 31, 1995...............         2,500             125          11,125         (3,600)          7,650
Net loss for year..........................            --              --              --         (3,489)         (3,489)
Issuance of stock purchase warrants........            --              --              30             --              30
                                                ---------       ---------       ---------      ---------       ---------

BALANCE AT DECEMBER 31, 1996...............         2,500             125          11,155         (7,089)          4,191
Net loss for year..........................            --              --              --         (3,764)         (3,764)
Issuance of stock purchase warrants........            --              --              30             --              30
Exercise of stock options..................            17               1               3             --               4
                                                ---------       ---------       ---------      ---------       ---------

BALANCE AT DECEMBER 31, 1997...............         2,517       $     126       $  11,188      $ (10,853)      $     461
                                                =========       =========       =========      =========       =========

See accompanying notes.

</TABLE>

CLEAN DIESEL TECHNOLOGIES, INC. (A DEVELOPMENT-STAGE COMPANY)

<TABLE>
<CAPTION>

STATEMENTS OF CASH FLOWS
(IN THOUSANDS)
                                                                                                     PERIOD FROM
                                                                                                      JANUARY 1,
                                                                                                        1992,
                                                      FOR THE YEARS ENDED DECEMBER 31                  THROUGH
                                                ----------------------------------------------       DECEMBER 31,
                                                   1995               1996              1997              1997
                                                ---------          ---------         ---------         ---------
<S>                                             <C>                <C>               <C>               <C>       
OPERATING ACTIVITIES
Net loss...................................     $  (2,024)         $  (3,489)        $  (3,764)        $ (10,853)
Adjustments to reconcile net loss to net
 cash used in operating activities:
   Depreciation............................            --                 12                24                36
   Issuance of stock purchase warrants.....            --                 30                30                60
   Changes in operating assets and 
    liabilities:
     Inventories...........................           (15)               (88)             (102)             (205)
     Other current assets..................            (1)              (221)              (16)             (238)
     Accounts payable and accrued expenses.           230                320                53               794
     Other assets..........................            --                (18)               --               (18)
     Due to Fuel-Tech N.V..................            --                (66)               --               (66)
                                                ---------          ---------         ---------         ---------
Net cash used in operating activities......        (1,810)            (3,520)           (3,775)          (10,490)
                                                ---------          ---------         ---------         ---------
FINANCING ACTIVITIES
Proceeds from 1995 Rights Offering net of
   $630 of brokerage commissions...........         9,138              2,018                --            11,156
Expenses of 1995 Rights Offering...........          (425)                --                --              (425)
Repayment of expenses of 1995 Rights
   Offering paid by Fuel-Tech N.V..........          (200)                --                --              (200)
Issuance of Common Shares to parent........            --                 --                --               250
Net parent company investment..............            --                 --                --               469
Proceeds of loan from Fuel-Tech N.V........         1,695                 --                --             2,874
Repayment of loan to Fuel-Tech N.V.........        (2,063)                --              (250)           (2,313)
Proceeds from exercise of stock options....            --                 --                 4                 4
                                                ---------          ---------         ---------         ---------
Net cash provided from (used in) financing
   activities..............................         8,145              2,018              (246)           11,815
                                                ---------          ---------         ---------         ---------
INVESTING ACTIVITIES
Sale (purchase) of short-term investments..            --             (2,000)            2,000                --
Purchase of fixed assets...................            --                (76)              (10)              (86)
                                                ---------          ---------         ---------         ---------
Net cash provided by (used in) investing               --             (2,076)            1,990               (86)
   activities.............................      ---------          ---------         ---------         ---------
NET (DECREASE) INCREASE IN CASH AND CASH
   EQUIVALENTS.............................         6,335             (3,578)           (2,031)            1,239
Cash and cash equivalents at beginning of  
   period..................................           513              6,848             3,270                -- 
                                                ---------          ---------         ---------         ---------

CASH AND CASH EQUIVALENTS AT END OF PERIOD.     $   6,848          $   3,270         $   1,239         $   1,239
                                                =========          =========         =========         =========

Cash payments for interest to Fuel-Tech
   N.V.....................................     $      --          $      63         $      44         $     107

NON-CASH ACTIVITIES
Contribution of net parent company
   investment to capital of the Company....     $      --          $      --         $      --         $     469
Stock subscription receivable..............     $   2,018          $      --         $      --         $   2,018
Issuance of stock purchase warrants........     $      --          $      30         $      30         $      60

See accompanying notes.

</TABLE>

Clean Diesel  Technologies,  Inc. (A  Development-Stage  Company)
Notes to Financial Statements

1.   BASIS OF PRESENTATION

     Clean Diesel  Technologies,  Inc. (the "Company") was  incorporated in
the State of Delaware on January 19, 1994, as a wholly owned  subsidiary of
Fuel-Tech N.V. ("Fuel Tech"). Predecessor financial information included in
the  accompanying  financial  statements  for the  period  January 1, 1992,
through  January 18,  1994,  reflects  the  Company's  operations  prior to
incorporation,  at which time it was accounted for as part of Fuel Tech. As
more fully  discussed in Note 4,  effective  December  12, 1995,  Fuel Tech
completed a Rights Offering of the Company's Common Shares. Accordingly, at
December 12, 1995, Fuel Tech held a 27.6% interest in the Company's  Common
Shares.

     The Company is a  development-stage  enterprise,  and its efforts from
January  1, 1992,  through  December  31,  1997,  have been  devoted to the
research,  development  and  commercialization  of Platinum Fuel  Catalysts
("PFC"),  some of which are  licensed  to the  Company  by Fuel  Tech,  and
nitrogen oxide ("NOx") reduction  technologies for diesel engines (see Note
6). There were no material  activities related to the Company's business in
1990 or 1991.  Prior to 1990,  the  activities of Fuel Tech were focused on
other  applications of the PFC that were unrelated to the Company's present
or contemplated  business and were not material to the overall  development
of the Company's  products.  Therefore,  such costs have been excluded from
the determination of the Company's development costs.

     The  Company  began  selling  its  PFC on a  commercial  basis  to the
consumer  car care  market in the  first  quarter  of 1997,  for use in the
aftertreatment  of fuel  (see  Note  8).  In order to sell the PFC in other
markets,  however,  additional  research  and  development  testing  may be
required.   The  Company's  NOx  control  technologies  will  also  require
additional  research and development  testing to determine their commercial
viability. The commercialization of these technologies will depend upon the
success  of  field  tests,   cost-effective   production  of  the  PFC  and
governmental regulations,  principally by the U.S. Environmental Protection
Agency and corresponding foreign and state agencies.  The accomplishment of
these objectives by the Company will require  additional  capital and there
can be no assurance that such capital will be available.

GOING CONCERN

     The financial  statements have been prepared assuming that the Company
will  continue as a going  concern and do not  include any  adjustments  to
reflect   the   possible   future   effects  on  the   recoverability   and
classification  of assets and the amount and  classification of liabilities
that may result from the possible inability of the Company to continue as a
going concern.

     As a result of the  aforementioned  recurring  operating  losses,  the
Company has been unable to  generate a positive  cash flow.  The Company is
actively seeking additional financing in the amount of $5 million through a
private  placement or other arrangement and is currently in discussion with
several  interested  parties;  however,  the  Company  has not  received  a
commitment from any such party.  Although the Company believes that it will
be successful in its capital  raising  efforts,  there is no guarantee that
the Company will be able to raise such capital on terms satisfactory to the
Company.  The  Company  has  developed  contingency  plans in the event its
financing  efforts are not  successful.  Such plans include cost reductions
(both general and administrative  and research and development),  licensing
the  Company's   technologies  and  selling  its   intellectual   property.
Accordingly,  at December 31, 1997,  there is  substantial  doubt as to the
Company's ability to continue as a going concern.

     On February 17, 1998, the Company received a commitment from Fuel Tech
to provide short-term financing in the amount of up to $500,000. Borrowings
pursuant to this  agreement  will be secured by the Company's  intellectual
property.  The Company's management believes that, with this loan from Fuel
Tech, the Company has adequate  capital to fund its operations  through the
first half of 1998.

2.   SIGNIFICANT ACCOUNTING POLICIES

USE OF ESTIMATES

     The  preparation  of  the  financial  statements  in  conformity  with
generally  accepted  accounting  principles  requires  management  to  make
estimates and assumptions that affect the amounts reported in the financial
statements and accompanying  notes.  Actual results could differ from those
estimates.

CASH AND CASH EQUIVALENTS AND FINANCIAL INSTRUMENTS

     The Company considers all highly liquid investments with a maturity of
three months or less when purchased to be cash equivalents. At December 31,
1996,  substantially  all  of  the  Company's  cash  and  cash  equivalents
consisted of a $1.5 million Eurodollar  deposit with a banking  institution
and $1.4  million in U.S.  Government  obligations.  At December  31, 1997,
substantially  all of the Company's cash and cash equivalents  consisted of
$1 million in U.S. Government obligations and a $0.2 million deposit with a
financial institution.

     All financial  instruments are reflected in the  accompanying  balance
sheets at amounts that approximate fair market value.

     Short-term  investments  at December  31,  1996,  consisted  of United
States  Government-backed  mortgages,  which  matured in 1997.  The Company
classified such investments as held to maturity and, accordingly, they were
carried at amortized cost in the accompanying balance sheet at December 31,
1996.

INVENTORIES

     Inventories  are  stated at lower of cost or  market  and  consist  of
finished product.  Cost is determined using the first-in,  first-out (FIFO)
method.

RESEARCH AND DEVELOPMENT COSTS

     Costs  relating to the research,  development  and testing of products
are charged to operations  as they are  incurred.  These costs include test
programs,  salaries and related  costs,  consultancy  fees,  materials  and
certain testing  equipment.  The cost of patent filings and maintenance are
also  charged  to  operations  as they are  incurred.  Included  in accrued
expenses at December 31, 1997, are liabilities for research and development
expenses owing to Ricardo  Consulting  Engineers Ltd., Delft University and
Johnson Matthey of $166,533, $53,559 and $51,719, respectively.

STOCK-BASED COMPENSATION

     The  Company  accounts  for stock  option  grants in  accordance  with
Accounting  Principles  Board (APB)  Opinion No. 25,  Accounting  for Stock
Issued to  Employees.  Under the  Company's  current  plan,  options may be
granted  at not less  than the fair  market  value on the date of grant and
therefore  no  compensation  expense is  recognized  for the stock  options
granted.  In  1996,  the  Company  adopted  the  disclosure  provisions  of
Statement of Financial  Accounting Standards (SFAS) No. 123, Accounting for
Stock-Based Compensation.

BASIC AND DILUTED LOSS PER COMMON SHARE

     In 1997, SFAS No. 128,  Earnings per Share,  was issued.  SFAS No. 128
replaced the  previously  reported  primary and fully diluted  earnings per
share with basic and diluted earnings per share,  respectively.  Unlike the
previously reported primary earnings per share, basic  earnings  per  share
excludes the dilutive effects of stock options.  Diluted earnings per share
is similar to the  previously  reported  fully diluted  earnings per share.
Earnings per share amounts for all periods  presented have been  calculated
in  accordance  with and,  where  appropriate,  restated  to conform to the
requirements of SFAS No. 128.

3.   TAXATION

     The  Company   accounts  for  income  taxes  in  accordance  with  the
"liability  method." Prior to December 12, 1995,  the Company's  operations
were included in the  consolidated  U.S.  federal income tax return of Fuel
Tech, Inc.

     At December  31, 1996 and 1997,  the Company had tax losses  available
for offset against future years' earnings of approximately $6.4 million and
$10 million,  respectively.  Temporary differences were insignificant as of
such dates. Approximately $0.9 million, $2.0 million, $3.5 million and $3.6
million of the tax loss carryforwards  expire in 2009, 2010, 2011 and 2012,
respectively.   The  Company  has  not  recognized  any  benefit  from  the
aforementioned tax loss carryforwards.

     Under the  provisions  of the  United  States  Tax Reform Act of 1986,
utilization of the Company's U.S. federal tax loss  carryforwards  (for the
period  prior to  December  12,  1995)  may be  limited  as a result of the
ownership  change in excess of 50% related to the Fuel Tech Rights Offering
(see Note 4).

4.   SHAREHOLDERS' EQUITY

     On December 12,  1995,  Fuel Tech  completed a Rights  Offering to its
existing  shareholders of 72.4% of the Company's  Common Shares,  retaining
27.6% of the Common  Shares  outstanding.  Under the terms of the offering,
each  Fuel  Tech   shareholder   and  Holder  of  Fuel  Tech's  Nil  Coupon
Non-redeemable  Convertible  Unsecured  Bridge Loan Notes ("Note  Holders")
received a Right to purchase one common share of the Company for every 7.65
Fuel Tech shares (or notes convertible into 7.65 Fuel Tech shares) held for
$6.50 per Company share.  Holders of Fuel Tech options were also allowed to
participate,  if  requested,  under the same terms.  Two million of the 2.5
million  Company  shares  held by Fuel  Tech  were  offered  in the  Rights
Offering.

     Approximately  1.8  million  Company  shares  were  purchased  in  the
offering,  which raised net  proceeds,  after  expenses  and  broker-dealer
commissions  aggregating $1.3 million, of approximately $10.5 million,  all
of which was  contributed  by Fuel Tech to the Company.  In December  1995,
after the offering was completed,  the Company paid Fuel Tech approximately
$2.3 million,  which represented the repayment of certain loans made to the
Company ($2.1 million),  as well as certain expenses of the Rights Offering
paid by Fuel Tech ($200,000).

     As  a  result  of  the  Rights   Offering  and  Fuel  Tech's   capital
contribution of the net offering proceeds, the Company's additional paid-in
capital increased by approximately $10.5 million.

     On December 26, 1995, the Company's Common Shares commenced trading on
the National  Association of Securities Dealers Quotation System ("Nasdaq")
under the symbol "CDTI."

5.   STOCK OPTIONS AND WARRANTS

     The Company maintains a stock award plan, the 1994 Incentive Plan (the
"Plan").  Under the Plan, awards may be granted to participants in the form
of  non-qualified  stock options,  stock  appreciation  rights,  restricted
stock,  performance  awards,  bonuses  or other  forms  of  share  based or
non-share  based awards or combinations  thereof.  Participants in the Plan
may be such of the Company's directors,  officers,  employees,  consultants
and   advisors   (except   consultants   or  advisors  in   capital-raising
transactions)  as the  directors  determine  are key to the  success of the
Company's  business.   The  Company  includes  50%-owned   subsidiaries  or
affiliates.  In 1996, shareholders amended the Plan to increase from 10% to
12 1/2%  the  percentage  of  outstanding  shares  of the  Company  used to
determine  the  maximum  number  of awards to  participants.  In 1997,  the
percentage was further increased from 12 1/2% to 17 1/2%. The policy of the
Board was to grant stock  options  vesting in three  equal  portions on the
first  through  third  anniversaries  of the grant date for grants prior to
1997,  and in equal  portions  on the grant  date and the first and  second
anniversaries of the grant date for grants awarded in 1997.

     If  compensation  expense for the Company's  plan had been  determined
based on the fair  value at the  grant  dates  for  awards  under its plan,
consistent  with the method  described in SFAS No. 123, the  Company's  net
loss and basic and diluted loss per share would have been  increased to the
pro forma amounts indicated below:

                                        1995        1996        1997
                                        ----        ----        ----
   Net loss (000's):
   As reported..................       $2,024      $3,489      $3,764
   Pro forma....................        2,031       3,600       4,040

   Basic and diluted loss per share:
   As reported..................       $ 0.81      $ 1.40      $ 1.50
   Pro forma....................         0.81        1.44        1.59


     In  accordance  with the  provisions  of SFAS No.  123,  the pro forma
disclosures  include only the effect of stock options granted in 1995, 1996
and 1997. The application of the pro forma disclosures  presented above are
not  representative  of the  effects  SFAS No.  123 may  have on  operating
results and earnings  (loss) per share in future years due to the timing of
stock  option  grants and  considering  that  options vest over a period of
three years.

     The  Black-Scholes  option  pricing  model  was  developed  for use in
estimating   the  fair  value  of  traded  options  that  have  no  vesting
restrictions and are fully transferable. In addition, option pricing models
require the input of highly subjective  assumptions  including the expected
stock price volatility.  Because the Company's  employee stock options have
characteristics  significantly  different  from those of traded options and
because changes in the subjective input  assumptions can materially  affect
the fair value estimate, in management's opinion the existing models do not
necessarily  provide a  reliable  single  measure  of the fair value of its
stock options.

     The  fair  value  of  each  option  grant,  for pro  forma  disclosure
purposes,   was   estimated  on  the  date  of  grant  using  the  modified
Black-Scholes  option  pricing  model with the  following  weighted-average
assumptions:

                                        1995        1996        1997
                                        ----        ----        ----
       Expected dividend yield           0.0%        0.0%        0.0%
       Risk-free interest rate           6.4%        6.8%       5.72%
       Expected volatility              65.4%       54.3%       61.3%
       Expected life of option        4 years     4 years     4 years


      The following  table presents a summary of the Company's stock option
activity and related information for the years ended December 31:

<TABLE>
<CAPTION>
                                        1995                            1996                           1997
                            ---------------------------     ---------------------------    ---------------------------
                            OPTIONS    WEIGHTED-AVERAGE     OPTIONS    WEIGHTED-AVERAGE    OPTIONS    WEIGHTED-AVERAGE
                            (000'S)     EXERCISE PRICE      (000'S)     EXERCISE PRICE     (000'S)     EXERCISE PRICE
                            -------     --------------      -------     --------------     -------     --------------
<S>                         <C>         <C>                 <C>         <C>                <C>         <C>   
Outstanding, beginning of
   year...................       125         $ 1.10             222          $ 2.86             287         $ 3.25
Granted...................        97           5.13              65            4.59             115           4.61
Exercised.................        --             --              --              --             (17)          0.20
Forfeited.................        --             --              --              --             (20)          4.52
                                ----         ------        --------          ------            ----         ------
Outstanding, end of year..       222         $ 2.86             287          $ 3.25             365         $ 3.77
                                ====         ======         =======          ======            ====         ======
Exercisable, end of year..        63         $ 1.40             189          $ 3.11             259         $ 3.41
Weighted-average fair
   value of options
   granted during the 
   year...................                   $ 2.79                          $ 2.25                         $ 2.18

</TABLE>


     The  following  table  summarizes   information  about  stock  options
outstanding at December 31, 1997:

<TABLE>
<CAPTION>
                                     Options Outstanding                              Options Exercisable
                     ------------------------------------------------------      ------------------------------
                                    WEIGHTED-AVERAGE
RANGE OF EXERCISE    NUMBER OF          REMAINING          WEIGHTED-AVERAGE      NUMBER OF     WEIGHTED-AVERAGE
      PRICES          OPTIONS       CONTRACTUAL LIFE        EXERCISE PRICE        OPTIONS       EXERCISE PRICE
- -----------------    ---------      ----------------       ----------------      ---------     ----------------
<S>                  <C>            <C>                    <C>                   <C>           <C>
  $.20  -  $2.00      108,334            3.5 years            $ 1.24              108,334          $ 1.24
  2.50  -   4.63      192,500            8.0                    4.21               91,663            3.82
  5.63  -   6.82       64,450            7.8                    6.70               59,449            6.75
- -----------------    ---------      ----------------       ----------------      ---------     ----------------
  $.20  -  $6.82      365,284            5.8 years            $ 3.77              259,446          $ 3.41

</TABLE>

     Pursuant to a financial consulting  agreement,  an investment bank has
the right to purchase  warrants  covering  50,000 of the  Company's  Common
Shares,  with an  exercise  price of $6.50 per share (an 18%  premium  over
market price on the date of issue).  The warrants  expire on March 1, 2001.
Included in the  Company's  Financial  Statements  is $30,000 of expense in
1996  related to the  issuance  of these  stock  purchase  warrants,  which
represented   the  fair  value  of  services   received  as  determined  by
utilization of the Black-Scholes option pricing model.

     In March  1997,  in  consideration  of his  undertaking  to assist the
Company in obtaining sources of permanent financing,  the Company granted a
director  of the  Company  a  warrant  to  purchase  25,000  shares  of the
Company's  Common  Shares for $10.00 per share (a 142%  premium over market
price on the date of  issue).  The  warrant  expires  on  March  17,  2004.
Included in the Company's  Financial  Statements is $30,000 of expense,  as
determined by utilization  of the  Black-Scholes  option pricing model,  in
1997, related to the issuance of these purchase warrants, which represented
the fair value of the services received.

6.   COMMITMENTS

     The Company is obligated under a sublease  agreement for its principal
office. Future minimum lease payments at December 31, 1997, are as follows:
1998--$65,000 and 1999--$11,000.  For the years ended December 31, 1996 and
1997, rental expense approximated $90,000 and $93,000  respectively.  Prior
to 1996,  the Company did not incur any rent expense as such  expenses were
included in management fees and allocations from Fuel Tech (see Note 7).

     Effective  as of October 28,  1994,  Fuel Tech granted two licenses to
the Company for all patents and rights  associated  with its Platinum  Fuel
Catalyst  technology.  Effective  November  24,  1997,  the  licenses  were
canceled and Fuel Tech  assigned to the Company all such patents and rights
on  terms  substantially  similar  to the  licenses.  In  exchange  for the
assignment,  the Company will pay Fuel Tech a royalty of 2.5% of its annual
gross  revenue from sales of the Platinum  Fuel  Catalysts,  commencing  in
1998. The royalty obligation expires in 2008. The Company may terminate the
royalty  obligation  to Fuel Tech by payment of $12 million  commencing  in
1998 and declining  annually to $1,090,910 in 2008. The Company as assignee
and owner will  maintain the  technology  at its own expense.  To date,  no
royalties have been paid to Fuel Tech.

7.   RELATED PARTY TRANSACTIONS

     On July 1, 1995, the Company entered into a $745,000 promissory demand
note  ("Demand  Note") with Fuel Tech  bearing an  interest  rate of 8% per
annum.  Pursuant to the Company's  agreement with Fuel Tech,  Fuel Tech did
not demand repayment during 1996. In the first quarter of 1997, the Company
repaid $250,000 of this note.  Throughout the life of the note, the Company
has made monthly  interest  payments on the unpaid balance.  On November 5,
1997,  the Company  entered into a $495,000  promissory  note ("Term Note")
with  Platinum  Plus,  Inc.  (a  wholly  owned  subsidiary  of  Fuel  Tech)
representing  the  unpaid  balance of the  Demand  Note on that  date.  The
principal  amount is payable in three annual  installments of $100,000 each
on July 1 of each of the years 1998 through  2000 with a final  installment
of $195,000 on July 1, 2001.  Interest at a rate of 8% per annum is payable
on the unpaid balance on each principal payment date.

     On February  17,  1998,  the Company  received a  commitment  of up to
$500,000  from Fuel Tech to fund its cash  requirements  until such time as
the Company  obtains the  long-term  financing it is seeking.  The $500,000
from Fuel Tech will be in the form of a grid note,  bearing interest at the
rate of 10% per annum.  The note will be  secured  by all of the  Company's
intellectual  property  and is  repayable,  in full,  on or before June 17,
1998.

     Average trade  balances due to Fuel Tech for the years ended  December
31, 1996 and 1997, approximated $183,000 and $69,000, respectively.

     On August 3,  1995,  the  Company  signed a  Management  and  Services
Agreement  with  Fuel  Tech.  According  to  the  agreement,   the  Company
reimburses Fuel Tech for management,  services and administrative  expenses
incurred  on behalf of the  Company.  Additionally,  Fuel Tech  charged the
Company a fee equivalent to an additional 10% of such costs.  In June 1996,
the Company  renegotiated  this  agreement.  Under the new  agreement,  the
Company  agreed to pay Fuel Tech a fee equal to an  additional 3% or 10% of
the costs paid on the Company's  behalf,  dependent  upon the nature of the
costs incurred.  Prior to the August 1995 agreement,  the Company paid Fuel
Tech a management  fee of $150,000 per quarter,  which  included the direct
costs and associated fees. The Company shares  facilities and certain other
resources  with Fuel Tech and costs are  allocated  between  the  companies
based on usage.  Certain of Fuel Tech's  officers  and  directors  serve as
officers and directors of the Company,  and the Company received management
and administrative support from Fuel Tech's staff. The Financial Statements
include allocations from Fuel Tech of certain management and administrative
costs,  which approximate  $904,000,  $1,232,000 and $403,000 for the years
ended December 31, 1995,  1996 and 1997,  respectively,  and $3,204,000 for
the  period  from  January  1,  1992,   through  December  31,  1997.  Cost
allocations  for such periods were based on the amount of  management  time
devoted to the  Company.  Certain  services  furnished  by Fuel Tech to the
Company were  terminated in mid-year  1996. In the opinion of the Company's
management,  such cost allocations are fair and reasonable and are on terms
no less favorable than could be obtained from a third party.

     During  1994,  Fuel Tech  contributed  $469,000 to the Company and the
Company issued 2,500,000 Common Shares to Fuel Tech for $250,000.

8.   MARKETING AND JOINT DEVELOPMENT AGREEMENTS

     In September  1996, the Company  entered into a supply  agreement with
Holt Lloyd  International  Ltd. ("Holts") of the United Kingdom to sell the
Company's  PFC under the  Company's  Platinum  Plus  trademark for use with
Holts's fuel additives in the  aftertreatment of fuel for both new and used
diesel  engines in the  consumer  car care  market.  The  agreement  covers
territories worldwide except for North, Central and South America. The term
of this agreement is 10 years with the possibility of a term extension. The
exclusivity of the agreement is determined by the attainment (or reasonable
effort toward the attainment) of predetermined  minimum  performance levels
for  each  territory  on a  calendar-year  basis.  The  Company's  PFC were
test-marketed  by Holts in  Europe  in the  fourth  quarter  of 1996,  with
commercial  sales  commencing in the first quarter of 1997.  This agreement
also  provides for  collaborative  testing of the Company's PFC product for
gasoline-fueled  vehicles,  which will be marketed  under  similar terms by
Holts.  This product was launched by Holts in Europe in late 1997 under the
Cat Guard name. In December 1997, Holts was acquired by Prestone  Products,
Inc.,  a division of  AlliedSignal.  Based on  management  and product line
changes at Holts, and as a result of the Prestone acquisition,  the Company
expects a delay in the buildup of sales to Holts in 1998.

     On November 11,  1996,  the Company  entered into a joint  development
agreement  with  Engelhard  Corporation  and Nalco Fuel Tech.  The  parties
agreed to collaborate on the commercialization of various diesel engine NOx
control  technologies,  both in the U.S.  and abroad.  The  companies  will
demonstrate  and market  technologies  utilizing  urea-based  NOx  catalyst
systems for stationary diesels.

9.   SUBSEQUENT EVENT

     On February 26,  1998,  the Company was notified by Nasdaq that it was
not   in   compliance    with   the   new   net   tangible    assets/market
capitalization/net  income  requirements.  As  such,  Nasdaq  informed  the
Company  that,  unless the Company  requests a temporary  exemption to this
requirement,  its  securities  will be delisted at the close of business on
March 16,  1998.  The Company has  requested a temporary  exemption to this
requirement, which will temporarily stay the delisting.

<TABLE>
<CAPTION>

BALANCE SHEET (UNAUDITED)
(IN THOUSANDS EXCEPT SHARE DATA)
                                                                                   March 31,
                                                                                     1998
                                                                                  ------------
<S>                                                                               <C>
ASSETS
Current assets:
Cash and cash equivalents..........................................               $        657
Inventories........................................................                        203
Other current assets...............................................                        122
                                                                                  ------------
Total current assets...............................................                        982
Other assets.......................................................                         62
                                                                                  ------------
Total assets.......................................................               $      1,044
                                                                                  ============
LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)
Current liabilities:
Accounts payable and accrued expenses..............................               $        829
Loan payable to Fuel-Tech N.V......................................                        100
                                                                                  ------------
Total current liabilities..........................................                        929

Loan payable to Fuel-Tech N.V......................................                        395

Shareholders' equity (deficit):
Preferred Stock, par value $0.05 per share, authorized 100,000
   shares, no shares issued and outstanding........................                         --
Common Shares, par value $0.05 per share, authorized 5,000,000
   shares, issued and outstanding 2,516,666 shares.................                        126
Additional paid-in capital.........................................                     11,188
Deficit accumulated during development stage.......................                    (11,594)
                                                                                  ------------
Total shareholders' equity (deficit)...............................                       (280)
                                                                                  ------------
Total liabilities and shareholders' equity (deficit)...............               $      1,044
                                                                                  ============

See note to financial statements.

</TABLE>

<TABLE>
<CAPTION>

STATEMENTS OF OPERATIONS (UNAUDITED)
(IN THOUSANDS EXCEPT PER SHARE DATA)
                                                                                                         Period from
                                                                       Three Months Ended             January 1, 1992,
                                                                            March 31,                      through
                                                                    1997                1998           March 31, 1998
                                                                   -------            -------            ---------
<S>                                                                <C>                <C>                <C>      
Sales....................................................          $    40            $    --            $     199
Costs and expenses:
Cost of sales............................................               23                 --                  132
General and administrative...............................              496                451                5,493
Research and development.................................              457                236                5,553
Patent filing and maintenance............................               75                 56                  994
                                                                   -------            -------            ---------
Loss from operations.....................................            1,011                743               11,973
Interest income..........................................              (64)               (13)                (594)
Interest expense.........................................               14                 11                  215
                                                                   -------            -------            ---------

Net loss during development stage........................          $   961            $   741            $  11,594
                                                                   =======            =======            =========

Basic and diluted loss per common share..................          $  0.38            $  0.29                  N/A
                                                                   =======            =======            =========

Average number of common shares
   outstanding...........................................            2,512              2,517                  N/A
                                                                   =======            =======            =========

See note to financial statements.

</TABLE>

<TABLE>
<CAPTION>

STATEMENTS OF CASH FLOWS (UNAUDITED)
(IN THOUSANDS)
                                                                                                        Period from
                                                                    Three Months Ended               January 1, 1992,
                                                                         March 31                         through
                                                                1997                  1998            March 31, 1998
                                                           -------------        -------------         -------------
<S>                                                        <C>                  <C>                   <C>           
OPERATING ACTIVITIES
Net cash used in operating activities.................     $      (1,075)       $        (581)        $     (11,071)
                                                           -------------        -------------         -------------
FINANCING ACTIVITIES
Proceeds from 1995 Rights Offering, net of $630 of
   brokerage commissions..............................                --                   --                11,156
Expenses of 1995 Rights Offering......................                --                   --                  (425)
Repayment of expenses of 1995 Rights Offering
   paid by Fuel-Tech N.V..............................                --                   --                  (200)
Issuance of Common Shares to parent...................                --                   --                   250
Net parent company investment.........................                --                   --                   469
Proceeds of loan from Fuel-Tech N.V...................                --                   --                 2,874
Repayment of loan to Fuel-Tech N.V....................              (250)                  --                (2,313)
Proceeds from exercise of stock options...............                 3                   --                     4
                                                           -------------        -------------         -------------
Net cash (used in) provided from financing activities.              (247)                  --                11,815
                                                           -------------        -------------         -------------
INVESTING ACTIVITIES
Net cash used in investing activities.................                (5)                  (1)                  (87)
                                                           -------------        -------------         -------------
NET (DECREASE) INCREASE IN CASH
   AND CASH EQUIVALENTS...............................            (1,327)                (582)                  657
Cash and cash equivalents at beginning of
   period.............................................             3,270                1,239                    --
                                                           -------------        -------------         -------------

CASH AND CASH EQUIVALENTS AT END OF PERIOD                 $       1,943        $         657         $         657
                                                           =============        =============         =============

See note to financial statements.

</TABLE>

BASIS OF PRESENTATION

     The  accompanying   unaudited,   condensed,   consolidated   financial
statements  have  been  prepared  in  accordance  with  generally  accepted
accounting  principles for interim financial  information and Rule 10-01 of
Regulation S-X. Accordingly, they do not include all of the information and
footnotes required by generally accepted accounting principles for complete
financial  statements.  In  the  opinion  of  management,  all  adjustments
considered  necessary for a fair presentation have been included.  All such
adjustments are of a normal  recurring  nature.  Operating  results for the
three month period ended March 31, 1998, are not necessarily  indicative of
the results that may be expected for the year ending December 31, 1998. For
further  information,  refer to the accompanying  Financial  Statements and
footnotes thereto for the year ended December 31, 1997.

     Clean Diesel Technologies, Inc. (the "Company") is a development-stage
enterprise,  and its efforts from January 1, 1992,  through March 31, 1998,
have been devoted to the research,  development  and  commercialization  of
Platinum Fuel Catalysts ("PFCs"), some of which are licensed to the Company
by Fuel-Tech  N.V.  ("Fuel  Tech"),  and nitrogen  oxide ("NOx")  reduction
technologies for diesel engines.  There were no material activities related
to the Company's business in 1990 or 1991. Prior to 1990, the activities of
Fuel Tech were focused on other applications of the PFC that were unrelated
to the Company's present or contemplated  business and were not material to
the overall  development of the Company's products.  Therefore,  such costs
have been excluded  from the  determination  of the  Company's  development
costs.

     In the first  quarter of 1997,  the Company began selling its PFC on a
commercial   basis  to  the  consumer  car  care  market  for  use  in  the
aftertreatment of fuel. In order to sell the PFC in other markets, however,
additional research and development testing may be required.  The Company's
NOx  control   technologies  will  also  require  additional  research  and
development   testing  to  determine  their   commercial   viability.   The
commercialization  of these  technologies  will  depend upon the success of
field  tests,  cost-effective  production  of  the  PFC,  and  governmental
regulations,   principally  by  the  Environmental  Protection  Agency  and
corresponding  foreign  and state  agencies.  The  accomplishment  of these
objectives by the Company will require  additional capital and there can be
no assurance that such capital will be available.  As more fully  described
under the  caption  "Related  Party  Transactions"  below,  the Company has
received a $1.4  million  bridge  loan and is actively  seeking  additional
funding. With the net proceeds of the bridge loan, the Company's management
believes that the Company has adequate capital to fund its operations up to
November  1998.  See  "Management's  Discussion  and  Analysis of Financial
Condition  and Results of  Operations  -- Liquidity and Sources of Capital"
elsewhere in this Prospectus.

GOING CONCERN

     The financial  statements have been prepared assuming that the Company
will  continue as a going  concern and do not  include any  adjustments  to
reflect   the   possible   future   effects  on  the   recoverability   and
classification  of assets and the amount and  classification of liabilities
that may result from the possible inability of the Company to continue as a
going concern.

     As a result of the Company's  recurring  operating losses, the Company
has been unable to generate a positive  cash flow.  In addition to the $1.4
million  bridge loan  mentioned  above,  the  Company is  actively  seeking
additional  financing of $2.0 million to $3.75  million  through the Rights
Offering.  Although the Company  believes that it will be successful in its
capital  raising  efforts,  there is no guarantee  that the Company will be
able  to  raise  such  capital  on  terms   satisfactory  to  the  Company.
Accordingly,  at March 31, 1998, there continues to be substantial doubt as
to the Company's ability to continue as a going concern.  See "Management's
Discussions  and Analysis of Financial  Condition and Results of Operations
- -- Liquidity and Sources of Capital" elsewhere in this prospectus.

INVENTORIES

     Inventories  are  stated at lower of cost or  market  and  consist  of
finished product.  Cost is determined using the first-in,  first-out (FIFO)
method.

BASIC AND DILUTED LOSS PER COMMON SHARE

     In 1997, SFAS No. 128,  Earnings per Share,  was issued.  SFAS No. 128
replaced the  previously  reported  primary and fully diluted  earnings per
share with basic and diluted earnings per share,  respectively.  Unlike the
previously  reported primary  earnings per share,  basic earnings per share
excludes the dilutive effects of stock options.  Diluted earnings per share
is similar to the  previously  reported  fully diluted  earnings per share.
Earnings per share amounts for all periods  presented have been  calculated
in  accordance  with and,  where  appropriate,  restated  to conform to the
requirements of SFAS No. 128.

WARRANT TO PURCHASE COMMON SHARES

     In March  1997,  in  consideration  of his  undertaking  to assist the
Company in obtaining sources of permanent financing,  the Company granted a
director  of the  Company  a  warrant  to  purchase  25,000  shares  of the
Company's  Common  Shares for $10.00 per share (a 142%  premium over market
price on the date of  issue).  The  warrant  expires  on  March  17,  2004.
Included in the Company's March 31, 1997 Statement of Operations is $30,000
of  expense  related  to the  issuance  of  this  purchase  warrant,  which
represented  the  fair  value  of  services  received,   as  determined  by
utilization of the Black-Scholes option pricing model.

RELATED PARTY TRANSACTIONS

     On February 17, 1998,  Fuel Tech agreed to provide the Company with up
to $500,000 in order to fund its cash  requirements  until such time as the
Company  obtains  the  long-term  financing  it is  seeking.  The  $500,000
commitment has subsequently  been converted into a bridge loan (the "Bridge
Loan"),  which will constitute  senior debt, will bear interest at the rate
of ten percent per annum and will be due April 15, 2001. The Bridge Loan is
automatically  convertible  into Series A Convertible  Preferred Stock upon
the  conclusion of a public or private  financing  that  contributes  $1.75
million of  additional  net  proceeds  to the  Company.  The bridge loan is
secured by all of the Company's intellectual property.  Subsequent to March
31,  1998,  the Company  received  from  outside  investors  an  additional
$900,000 of financing under the same bridge loan.

     The Company believes that, with the $1.4 million Bridge Loan described
above,  it has  sufficient  cash  balances to fund its  operations  through
November 1998. The Company is actively seeking additional  financing in the
amount of $2.0  million  to $3.75  million  through  the  Rights  Offering.
Although the Company  believes  that it will be  successful  in its capital
raising  efforts,  there is no  guarantee  that the Company will be able to
raise such capital on terms satisfactory to the Company.

SUBSEQUENT EVENTS

     On February 26,  1998,  the Company was notified by Nasdaq that it was
not   in   compliance    with   the   new   net   tangible    assets/market
capitalization/net  income requirements.  As such, the Company's securities
were  delisted at the close of business on June 30, 1998.  Quotations as to
the  Company's  shares have  continued  to be available on the OTC Bulletin
Board.

     In May 1998,  the Company  received  $950,000 of the proceeds from the
$1.4  million  Bridge  Loan,  as more fully  described  in  "Related  Party
Transactions"  above. The remaining  proceeds of $300,000 and $150,000 were
received  in June and July 1998,  respectively.  The  Company is  currently
using the proceeds to fund its operations.

     On June 17, 1998,  the  shareholders  of the Company voted to increase
the  authorized  capital of the Company from  5,100,000  shares,  par value
$0.05, to 15,100,000  shares,  par value $0.05. Of the authorized  capital,
15,000,000  will be  designated  as Common  Shares and 100,000 as Preferred
Stock.

     On July 1,  Platinum  Plus,  Inc.  elected to defer  repayment  of the
$100,000 of principal  due on the  $495,000  Term Loan.  Platinum  Plus has
reserved the right,  however,  to call this payment at any time.  As of the
date of this  prospectus,  Platinum Plus, Inc. has not demanded  repayment.
The  interest  accrued  on the  note  as of July 1,  1998  was  paid by the
Company.

NO  DEALER,   SALESMAN,   OR  OTHER
PERSON HAS BEEN  AUTHORIZED TO GIVE
ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATION   NOT  CONTAINED  IN
THIS     PROSPECTUS,     AND    ANY
INFORMATION OR  REPRESENTATION  NOT
CONTAINED HEREIN MUST NOT BE RELIED
UPON AS HAVING BEEN  AUTHORIZED  BY
THE COMPANY.  THIS  PROSPECTUS DOES
NOT CONSTITUTE AN OFFER TO SELL, OR
A SOLICITATION OF ANY OFFER TO BUY,
ANY  OF  THE   SECURITIES   OFFERED
HEREBY IN ANY  JURISDICTION  TO ANY
PERSON  TO WHOM IT IS  UNLAWFUL  TO
MAKE  SUCH  OFFER OR  SOLICITATION.               CLEAN DIESEL
NEITHER   THE   DELIVERY   OF  THIS            TECHNOLOGIES, INC.
PROSPECTUS   NOR  ANY   SALE   MADE
HEREUNDER    SHALL,    UNDER    ANY
CIRCUMSTANCES,      CREATE      ANY     50,000 RIGHTS TO ACQUIRE SHARES OF
IMPLICATION  THAT  THE  INFORMATION    SERIES B CONVERTIBLE PREFERRED STOCK
HEREIN  IS  CORRECT  AS OF ANY DATE
SUBSEQUENT  TO THE DATE  HEREOF  OR
THAT  THERE  HAS BEEN NO  CHANGE IN
THE  AFFAIRS OF THE  COMPANY  SINCE
SUCH   DATE  OR,  IN  THE  CASE  OF
INFORMATION  INCORPORATED HEREIN BY
REFERENCE,  THE DATE OF FILING WITH
THE COMMISSION.

      ------------------------

         TABLE OF CONTENTS

                               PAGE
                               ----

PROSPECTUS SUMMARY................3    50,000 SHARES OF SERIES B CONVERTIBLE
RISK FACTORS.....................13              PREFERRED STOCK
THE RIGHTS OFFERING..............20
USE OF PROCEEDS..................29
DIVIDEND POLICY..................30
CAPITALIZATION...................31
DILUTION.........................33
SUMMARY SELECTED FINANCIAL DATA..35      1,650,000 SHARES OF COMMON STOCK
  MANAGEMENT'S DISCUSSION AND
  ANALYSIS OF FINANCIAL CONDITION
  AND RESULTS OF OPERATIONS......37
BUSINESS.........................42
MANAGEMENT.......................51
PRINCIPAL SHAREHOLDERS...........57
CERTAIN RELATIONSHIPS AND
  RELATED TRANSACTIONS...........57
DESCRIPTION OF CAPITAL STOCK.....59                 ----------
SHARES ELIGIBLE FOR FUTURE SALE..65                 PROSPECTUS
PLAN OF DISTRIBUTION.............65                 ----------
LEGAL MATTERS....................65
EXPERTS..........................66
FINANCIAL STATEMENTS............F-1

                                               ___________, ____ 1998


                                  PART II

                   INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The  following is an  itemization  of all expenses  (subject to future
contingencies)  incurred  or  expected  to be  incurred  by the  Company in
connection  with the  issuance and  distribution  of the  securities  being
offered hereby other than  broker-dealer  commissions (items marked with an
asterisk (*) represent estimated expenses):

          Registration Fee..........................   $      1,100
          Blue Sky Filing Fees and Expenses*........   $     15,000
          Printing and Engraving Costs*.............   $     35,000
          Transfer Agent, Subscription Agent and
             Information Agent Fees*................   $     15,000
          Legal Fees and Expenses*..................   $    250,000
          Accounting Fees and Expenses*.............   $     50,000
          Miscellaneous*............................   $     33,900
                                                       ------------

               TOTAL*                                  $    400,000

ITEM 14. INDEMNIFICATION OF OFFICERS AND DIRECTORS

     Delaware  General  Corporation  Law,  Section  102(b)(7),   enables  a
corporation in its original  certificate of  incorporation  or an amendment
thereto  validly  approved by  shareholders  to eliminate or limit personal
liability  of  members  of its  Board  of  Directors  for  violations  of a
director's  fiduciary duty of care. However,  the elimination or limitation
shall not  apply  where  there  has been a breach  of the duty of  loyalty,
failure  to act in  good  faith,  engaging  in  intentional  misconduct  or
knowingly  violating  a  law,  paying  a  dividend  or  approving  a  stock
repurchase  which is deemed  illegal  or  obtaining  an  improper  personal
benefit.  In accordance  with Delaware  law, the Company's  Certificate  of
Incorporation   eliminates  in  certain   circumstances  the  liability  of
directors of the Company for monetary damages for breach of their fiduciary
duty as  directors.  This  provision  does not eliminate the liability of a
director (i) for a breach of the director's  duty of loyalty to the Company
or its shareholders, (ii) for acts or omissions by the director not in good
faith or which involve  intentional  misconduct  or a knowing  violation of
law, (iii) for a willful or negligent  declaration of an unlawful dividend,
stock  purchase  or  redemption  or (iv) for  transactions  from  which the
director derived an improper Personal benefit.

     In addition,  the  Company's  Certificate  of  Incorporation  includes
provisions  to  indemnify  its  officers and  directors  and other  persons
against  expenses,  judgments,  fines and  amounts  paid in  settlement  in
connection  with  threatened,  pending or  completed  suits or  proceedings
against  such  persons by reason of serving or having  served as  officers,
directors,  or in other  capacities,  except in  relation  to matters  with
respect to which such persons shall be determined not to have acted in good
faith,  unlawfully or in the best interests of the Company. With respect to
matters as to which the  Company's  officers and  directors  and others are
determined to be liable for misconduct or negligence in the  performance of
their  duties,  the Company's  Certificate  of  Incorporation  provides for
indemnification  only to the extent that the Company  determines  that such
person  acted  in good  faith  and in a  manner  not  opposed  to the  best
interests of the Company.

     Insofar as limitation of, or indemnification  for, liabilities arising
under the  Securities  Act may be  permitted  to  directors,  officers,  or
persons controlling the Company pursuant to the foregoing,  the Company has
been informed  that in the opinion of the  Commission,  such  limitation or
indemnification  is against  public  policy as expressed in the  Securities
Act, and therefore, unenforceable.

     The  Company's  officers and  directors  are, or may become,  in their
individual capacities, officers, directors, controlling shareholders and/or
partners of other entities engaged in a variety of businesses.  Thus, there
exists  potential  conflicts of interest,  including,  among other  things,
time, effort, and corporate opportunity,  incident to involvement with such
other business  entities.  The officers and directors have a fiduciary duty
of loyalty to the Company to disclose to the Company business opportunities
which  come  to  their  attention  which  may be in the  Company's  area of
interest, functionally and geographically.

     The  officers  and  directors  of the Company are not  precluded  from
contracting  or dealing with the Company or affiliated  entities,  subject,
however,  to fully  disclosing real or potential  conflicts and documenting
such  disclosures  in  corporate  minutes  and  obtaining  approval  from a
majority of the Company's disinterested directors.

     Delaware  General  Corporation Law, Section 145, permits a corporation
organized  under  Delaware law to  indemnify  directors  and officers  with
respect to any matter in which the director or officer  acted in good faith
and in a  manner  he  reasonably  believed  to be not  opposed  to the best
interests of the Company,  and,  with respect to any criminal  action,  had
reasonable cause to believe his conduct was lawful.

ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES

     In May, June and July,  1998,  the Company  entered into a Bridge Loan
agreement  with certain  lenders,  including Fuel Tech, for an aggregate of
$1.4 million.  The Bridge Loan is convertible into 2,800 shares of Series A
Convertible  Preferred Stock at the lenders'  discretion or upon conclusion
of a  specified  public or private  financing.  The  issuance  of the notes
evidencing  the  Bridge  Loan  and  the  underlying  Series  A  Convertible
Preferred Stock were made in reliance on Section 4(2) of, and/or Regulation
S under, the Securities Act of 1933.

ITEM 16. EXHIBITS

     The following exhibits are filed herewith:

 Exhibit
   No.     Title
- --------   -----
3(i)(a)    Certificate of Incorporation, as amended.

*3(i)(b)   Certificate of Designation of Series A Convertible Preferred Stock
           of the Company.

3(i)(c)    Form of Certificate of Designation of Series B Convertible
           Preferred Stock of the Company.

**3(ii)    By-Laws.

+++4a      Specimen Stock Certificate.

4b         Specimen Subscription Certificate.

4c         Instructions as to use of Subscription Certificates.

4d         Notice of Guaranteed Delivery (filed as Exhibit A to Instructions).

4e         Affidavit of Lost, Stolen, Destroyed or Mutilated Rights
           Certificate(s) (filed as Exhibit B to Instructions).

4f         Cover letter to Holders of Common Shares.

4g         Cover letter to securities dealers,  commercial banks,  brokers,
           trust companies and other nominees.

4h         Suggested   form  letter  to  clients  of  securities   dealers,
           commercial banks, brokers, trust companies and other nominees.

4i         Instruction to Record Date Holder.

4j         DTC Participant Oversubscription Exercise Form.

4k         Nominee Holder Certification.

+++5       Opinion Letter of Fried, Frank, Harris, Shriver & Jacobson as to
           legality of shares being registered.

***10a     Assignment of Intellectual Property Rights Fuel-Tech N.V. to
           Platinum Plus, Inc. as of November 5, 1997.

***10b     Assignment of Intellectual Property Rights Fuel Tech, Inc. to the
           Company as of November 5, 1997.

***10c     Assignment Agreement as of November 5, 1997 among Platinum Plus,
           Inc., Fuel-Tech N.V. and the Company.

++10d      The Company's 1994 Incentive Plan, as amended through August 8,
           1996.

+10e       Management Services Agreement between the Company, Fuel Tech Inc.
           and Fuel Tech, dated as of June 1, 1996.

**10f      Memorandum  of  Understanding  between  the  Company  and  Anglo
           American Platinum Corporation Ltd., dated August 15, 1995.

***10g     Promissory Note of the Company to Platinum Plus, Inc., dated
           November 5, 1997.

***10h     Grid Note and Security Agreement of the Company to Platinum Plus,
           Inc.,  dated  February  17, 1998 (data in Schedule A included in
           Schedules to Exhibits 10a, b and c).

****10i    Office Premises Lease of January 26, 1996.

***10j     Registration Rights Agreement between the Company and Fuel Tech of
           November 5, 1997.

**10k      License Agreement between Fuel Tech and the Company, effective
           October 28, 1994.

**10l      License Agreement between the Company and Platinum Plus, Inc.,
           effective October 28, 1994.

++++10m    Supply Agreement between the Company and Holt Lloyd International
           Ltd. dated September 12, 1996.

++++10n    Joint Development Agreement by and among Englehard Corporation, the
           Company, and Nalco Fuel Tech dated November 11, 1996.

++++10o    Cooperative-development Agreement by and between the Company and
           AMBAC International dated December 17, 1997.

*10p       Bridge  Loan  Agreement  between  the  Company  and the  several
           lenders set forth on Schedule A thereto dated May 8, 1998.

10q        Supplemental  Agreement dated as of July 10, 1998 to Bridge Loan
           Agreement dated as of May 8, 1998 among the Company, the Lenders
           under the Bridge Loan  Agreement and the Lenders who have agreed
           to become parties to the Supplemental Agreement.

10r        Second  Supplemental  Agreement to Bridge Loan Agreement dated as
           of August 3, 1998 among the Company, the Lenders under the Bridge
           Loan  Agreement and the Lenders who have agreed to become parties
           to the Supplemental Agreement.

10s        Agreement by and between Jeremy D.  Peter-Hoblyn and the Company
           dated as of December 2, 1996.

10t        Agreement  by and  between  James M.  Valentine  and the Company
           dated as of September 12, 1997.

+++10u     Subscription Agent Agreement by and between the Company and
           ChaseMellon Shareholder Services, L.L.C. dated ________ ___, 1998.

12         Statement Re:  Computation of Ratio of Earnings to Fixed Charges
           and Preferred Stock Dividends.

23a        Consent of Ernst & Young LLP.

+++23b     Consent of Fried, Frank,  Harris,  Shriver & Jacobson (contained
           in Opinion filed as Exhibit 5).

24         Power of Attorney (see page II-5).

- ------------------------------------------------

*    Previously  filed as an  Exhibit to Form 8-K dated May 26,  1998,  and
     incorporated by reference herein.

**   Previously  filed as an Exhibit to Registration  Statement on Form S-1
     of August 16,  1995,  No.  33-95840,  and  incorporated  by  reference
     herein.

***  Previously  filed  as an  Exhibit  to Form  10-K  for the  year  ended
     December 31, 1997, and incorporated by reference herein.

**** Previously  filed  as an  Exhibit  to Form  10-K  for the  year  ended
     December 31, 1995, and incorporated by reference herein.

+    Previously  filed as an  Exhibit  to Form 10-Q for the  quarter  ended
     September 30, 1996, and incorporated by reference herein.

++   Previously  filed  as an  Exhibit  to Form  10-K  for the  year  ended
     December 31, 1996 and incorporated by reference herein.

+++  To be filed by amendment.

++++ Portions of these exhibits have been omitted pursuant to a request for
     confidential treatment.

ITEM 17. UNDERTAKINGS

     (a)  The undersigned Registrant hereby undertakes:

          (1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this Registration Statement:

               (i)  To include any prospectus  required by Section 10(a)(3)
                    of the Securities Act of 1933;

               (ii) To  reflect  in the  prospectus  any  facts  or  events
                    arising  after the effective  date of the  Registration
                    Statement (or the most recent post-effective  amendment
                    thereof)  which,  individually  or  in  the  aggregate,
                    represent a fundamental  change in the  information  in
                    the Registration Statement; and

               (iii)To include any  material  information  with  respect to
                    the plan of  distribution  not previously  disclosed in
                    the  Registration  Statement or any material  change to
                    such information in the Registration Statement;

          (2) That, for the purpose of determining  any liability under the
Securities Act of 1933, each such post-effective amendment shall be treated
as a new registration statement relating to the securities offered therein,
and the offering of such  securities at that time shall be deemed to be the
initial bona fide offering thereof.

          (3) To  remove  from  registration  by means of a  post-effective
amendment any of the securities being registered which remain unsold at the
termination of the Offering.

          (4) The undersigned  registrant  hereby  undertakes to supplement
the prospectus,  after the expiration of the  subscription  period,  to set
forth the  results  of the  subscription  offer,  the  transactions  by the
underwriters  during the  subscription  period,  the amount of unsubscribed
securities  to be  purchased  by the  underwriters,  and the  terms  of any
subsequent  reoffering  thereof. If any public offering by the underwriters
is to be made on terms  differing from those set forth on the cover page of
the prospectus,  a post-effective  amendment will be filed to set forth the
terms of such offering.

          (5) For purposes of determining liability under the Act:

               (i)  The  information  omitted  from the form of  prospectus
                    filed as part of a  registration  statement in reliance
                    upon Rule 430A and  contained in the form of prospectus
                    filed by the  Registrant  pursuant to Rule 424(b)(1) or
                    (4) or 497(h)  under the Act shall be deemed to be part
                    of the  Registration  Statement  as of the  time it was
                    declared effective; and

               (ii) Each  post-effective  amendment that contains a form of
                    prospectus  shall be  deemed  to be a new  registration
                    statement  relating to the securities  offered therein,
                    and the offering of such  securities at that time shall
                    be deemed to be the initial bona fide offering thereof.

     (b)  Insofar as  indemnification  for  liabilities  arising  under the
Securities  Act of  1933  may be  permitted  to  directors,  officers,  and
controlling persons of the Registrant pursuant to the foregoing provisions,
or otherwise,  the  Registrant  has been advised that in the opinion of the
Securities and Exchange  Commission such  indemnification is against public
policy as expressed  in the Act and is,  therefore,  unenforceable.  In the
event that a claim for indemnification against such liabilities (other than
the payment by the  Registrant of expenses  incurred or paid by a director,
officer,  or controlling person of the Registrant in the successful defense
of any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered,  the
Registrant  will,  unless in the opinion of its counsel the matter has been
settled  by  controlling  precedent,  submit  to  a  court  of  appropriate
jurisdiction  the question  whether such  indemnification  by it is against
public  policy as  expressed  in the Act and will be  governed by the final
adjudication of such issue.


                                 SIGNATURES

     Pursuant  to the  requirements  of the  Securities  Act of  1933,  the
Registrant has duly caused this Registration  Statement to be signed on its
behalf by undersigned,  thereunto duly authorized, in the City of Stamford,
State of Connecticut, on August 7, 1998.

                                    CLEAN DIESEL TECHNOLOGIES, INC.


                                    By: /s/ Jeremy D. Peter-Hoblyn
                                       ------------------------------------
                                        Jeremy D. Peter-Hoblyn, President
                                          and Chief Executive Officer,
                                                    Director

     Pursuant  to the  requirements  of the  Securities  Act of 1933,  this
Registration  Statement  has been  signed by the  following  persons in the
capacities and on the dates indicated.

     WE,  THE   UNDERSIGNED   OFFICERS   AND   DIRECTORS  OF  CLEAN  DIESEL
TECHNOLOGIES,  INC.,  hereby  severally  constitute  and appoint  Jeremy D.
Peter-Hoblyn,  Scott M. Schecter and Charles W. Grinnell,  and each of them
singly,  our true and lawful attorneys with full power to them, and each of
them singly,  to sign for us and in our names in the  capacities  indicated
below,  the  Registration  Statement on Form S-1 filed herewith and any and
all  pre-effective  and  post-effective  amendments  to  said  Registration
Statement,  and  generally  to do all things in our names and behalf in our
capacities as officers and  directors to enable Clean Diesel  Technologies,
Inc.  to comply  with the  provisions  of the  Securities  Act of 1933,  as
amended,  and all  requirements of the Securities and Exchange  Commission,
hereby ratifying and confirming our signatures as they may be signed by our
said attorneys,  or any of them, to said Registration Statement and any and
all amendments thereto.

           Name                     Capacity                    Date
           ----                     --------                    ----

/s/ Jeremy D. Peter-Hoblyn
- --------------------------
  Jeremy D. Peter-Hoblyn     President and Chief            August 7, 1998
                             Executive Officer,
                             Director (principal
                             executive officer)
/s/ James M. Valentine
- --------------------------
    James M. Valentine       Executive Vice President       August 7, 1998
                             and Chief Operating
                             Officer, Director
/s/ Charles W. Grinnell
- --------------------------
   Charles W. Grinnell       Vice President, General        August 7, 1998
                             Counsel and Corporate
                             Secretary; Director
/s/ Scott M. Schecter
- --------------------------
    Scott M. Schecter        Vice President, Treasurer      August 7, 1998
                             and Chief Financial
                             Officer (principal
                             financial and accounting
                             officer)
/s/ John A. de Havilland
- ------------------------
   John A. de Havilland      Director                        August 7, 1998

/s/ Ralph E. Bailey
- ------------------------
     Ralph E. Bailey         Chairman of the Board,          August 7, 1998
                             Director

/s/ Douglas G. Bailey
- ------------------------
    Douglas G. Bailey        Director                        August 7, 1998



*By /s/ Charles W. Grinnell
   ------------------------------
        Charles W. Grinnell
         Attorney-in-Fact

                                                               Exhibit 3(i)(a)

                        CERTIFICATE OF INCORPORATION

                                     OF

                      CLEAN DIESEL TECHNOLOGIES, INC.



     1.   The name of the corporation is

               Clean Diesel Technologies, Inc.

     2.   The address of its registered office in the State of Delaware is
          Corporation Trust Center, 1209 Orange Street, in the city of
          Wilmington, County of New Castle. The name of its registered
          agent at such address is the Corporation Trust Company.

     3.   The nature of the business or purposes to be conducted or
          promoted is to engage in any lawful act or activity for which
          corporations may be organized under the General Corporation Law
          of Delaware.

     4.   The corporation shall have authority to issue the total number of
          Five Million (5,000,000) shares of the par value each of One
          Dollar ($1.00) per share, amounting in the aggregate to Five
          Million Dollars ($5,000,000.00) all of which shall be Common
          Stock.

     5.   The name and mailing address of each incorporator is

                        Name                           Address
                        ----                           -------
                 Charles W. Grinnell             1055 Washington Blvd.
                                                 Stamford CT  06901

     6.   In furtherance and not in limitation of the powers conferred by
          statute, the Board of Directors is expressly authorized to make,
          alter or repeal the by-laws of the corporation.

     7.   Elections of Directors need not be by written ballot unless the
          by-laws of the corporation shall so provide.

     8.   Meetings of stockholders may be held within or without the state
          of Delaware, as the by-laws may provide. The books of the
          corporation may be kept outside of the State of Delaware at such
          place or places as may be designated from time to time by the
          board of directors or in the by-laws of the corporation.

     9.   (a) A director of the corporation shall not be personally liable
          to the corporation or its stockholders for monetary damages for
          breach of fiduciary duty as a director except that this Article 9
          shall not eliminate or limit a director's liability (i) for any
          breach of the director's duty of loyalty to the corporation or
          its stockholders, (ii) for acts or omissions not in good faith or
          which involve intentional misconduct or a knowing violation of
          law, (iii) under Section 174 of the Delaware General Corporation
          law, or (iv) for any transaction from which the director derived
          an improper personal benefit.

          (b) If the Delaware General Corporation Law is amended after
          approval by the stockholders of this Article 9 to authorize
          corporate action further eliminating or limiting the personal
          liability of directors, then the liability of a director of the
          corporation shall be eliminated or limited to the fullest extent
          permitted by the Delaware General Corporation Law, as so amended
          from time to time.

          (c) Any  repeal  or  modification  of this  Article  9 shall  not
          increase  the   personal   liability  of  any  director  of  this
          corporation for any act or occurrence taking place prior to such
          repeal or  modification,  or otherwise  adversely  affecting  any
          right or protection of a director of the corporation  existing at
          the time of such repeal or modification.

     10.  (a) Except as otherwise provided below, the corporation, shall,
          to the fullest extent indemnify each person who is, or shall have
          been, a director, officer, employee, or agent of the corporation
          or who is or was a director, officer, employee or agent of the
          corporation and is serving, or shall have served, at the request
          of the corporation , as a director, officer, employee or agent of
          another organization or in any capacity with respect to any
          employee benefit plan of the corporation, against all liabilities
          and expenses (including judgments, fines, penalties, amounts paid
          or to be paid in settlement, and reasonable attorneys fees)
          imposed upon or incurred by any such person (the "Indemnitee") in
          connection with, or arising out of, the defense or disposition of
          any action, suit or other proceeding, whether civil or criminal,
          in which he may be a defendant or with which he may be threatened
          or otherwise involved, directly or indirectly, by reason of his
          being or having been such a director, officer, employee or agent
          or as a result of his serving or having served with respect to
          any such employee benefit plan; provided, however, that the
          corporation shall provide no indemnification with respect to any
          matter as to which any such Indemnitee shall be finally
          adjudicated in such action suit or proceeding not to have acted
          in good faith in the reasonable belief that his action was (i) in
          the best interests of the corporation or (ii) to the extent such
          matter relates to service with respect to an employee benefit
          plan, in the best interests of the participants or beneficiaries
          of such employee benefit plan.

          (b) The right to indemnification conferred in this Article 10
          shall include the right to be paid by the corporation for
          liabilities and expenses incurred in connection with the
          settlement or compromise of any such action, suit or proceeding,
          pursuant to a consent decree or otherwise, unless a determination
          is made, within forty-five (45) days after receipt by the
          corporation of a written request by the Indemnitee for
          indemnification, that such settlement or compromise is not in the
          best interests of the corporation or, to the extent such matter
          related to service with respect to an employee benefit plan, that
          such settlement or compromise is not in the best interests of the
          participants or beneficiaries of such plan. Any such
          determination shall be made (i) by the board of directors of the
          corporation by a majority vote of a quorum consisting of
          disinterested directors, or (ii) if such quorum is not
          obtainable, by a majority of the disinterested directors then in
          office. Notwithstanding the foregoing, if there are less than two
          disinterested directors of the corporation then in office, the
          board of directors shall promptly direct that independent legal
          counsel (who may be regular legal counsel to the corporation)
          determine, based on facts known to such counsel at such time,
          whether such Indemnitee acted in good faith in the reasonable
          belief that this action was in the best interests of the
          corporation or the participants or beneficiaries of any such
          employee benefit plan, as the case may be; and, in such event,
          indemnification shall be made to such Indemnitee unless, within
          forty-five (45) days after receipt by the corporation of the
          request by such Indemnitee for indemnification, such independent
          legal counsel in a written opinion to the corporation determines
          that such Indemnitee did not act in good faith in the reasonable
          belief that his action was in the best interests of the
          corporation or the participants or beneficiaries of any such
          employee benefit plan, as the case may be.

          (c) As a condition precedent to his right to be indemnified, the
          Indemnitee must give the corporation notice in writing as soon as
          practicable of any action, suit or proceeding involving him for
          which indemnity will or could be sought. With respect to any
          action, suit or proceeding of which the corporation is not
          notified, the corporation will be entitled to participate therein
          at its own expense and/or to assume the defense thereof at its
          own expense, with legal counsel reasonably acceptable to such
          Indemnitee. After notice from the corporation to the Indemnitee
          of its election so to assume such defense, the corporation shall
          not be liable to such Indemnitee for any legal or other expenses
          subsequently incurred by such Indemnitee in connection with such
          claim, but the fees and expenses of such counsel incurred after
          notice from the corporation of its assumption of the defense
          thereof shall be at the expense of the Indemnitee unless (i) the
          employment of counsel by the Indemnitee has been authorized by
          the corporation, (ii) counsel to the Indemnitee shall have
          reasonably concluded that there may be a conflict of interest or
          position on any significant issue between the corporation and the
          Indemnitee in the conduct of the defense of such action or (iii)
          the corporation shall not in fact have employed counsel to assume
          the defense of such action, in each of which cases, the fees and
          expenses of counsel for the Indemnitee shall be at the expense of
          the corporation, except as otherwise expressly provided by this
          article. The corporation shall not be entitled to assume the
          defense of any claim brought by or on behalf of the corporation
          or as to which counsel for the Indemnitee shall have reasonably
          made the conclusion provided for in (ii) above.

          (d) Subject to paragraph 4 above, the right to indemnification
          referred to in this article shall include the right to be paid by
          the corporation for expenses (including reasonable attorneys'
          fees) incurred in defending a civil on criminal action, suit or
          proceeding in advance of its final disposition, subject to
          receipt of an undertaking by the Indemnitee to repay such payment
          if it is ultimately determined that the Indemnitee is not
          entitled to indemnification under this article. Such undertaking
          may be accepted without reference to the financial ability of
          such Indemnitee to make such repayment. Notwithstanding the
          foregoing, no advance shall be made by the corporation under this
          paragraph (d) if a determination is reasonably and promptly made
          by the board of directors by a majority vote of a quorum
          consisting of disinterested directors or, if such quorum is not
          obtainable, by a majority of the disinterested directors of the
          corporation then in office or, if there are not at least two
          disinterested directors then in office, by independent legal
          counsel (who may be regular legal counsel to the corporation) in
          written opinion that, based on facts known to the board of
          directors or counsel at such time, such Indemnitee did not act in
          good faith in the reasonable belief that his action was in the
          best interests of the corporation or the participants or
          beneficiaries of an employee benefit plan of the corporation, as
          the case may be.

          (e) If an Indemnitee is entitled under any provision of this
          article to indemnification by the corporation for some or a
          portion of the liabilities or expenses imposed upon or incurred
          by such Indemnitee in the investigation, defense, appeal or
          settlement of any action, suit or proceeding but not, however,
          for the total amount thereof, the corporation shall nevertheless
          indemnify the Indemnitee for the portion of such liabilities or
          expenses to which such Indemnitee is entitled.

          (f) The right to indemnification and the payment of expenses
          incurred in defending any action, suit or proceeding in advance
          of its final disposition conferred in this Article shall not be
          exclusive of any other right which any person may have or
          thereafter acquire under any statute, provision of the articles
          of incorporation, by-laws, agreement, vote of stockholders of
          managing directors or otherwise. Without limiting the generality
          of the foregoing, the corporation, acting through its board of
          directors, may enter into agreements with any director or
          employee of the corporation providing for indemnification rights
          equivalent to or greater than the indemnification rights set
          forth in this article.

          (g) The corporation may purchase and maintain insurance, at its
          expense, to protect itself and any director or employee of the
          corporation or another organization or employee benefit plan
          against any expense or liability incurred by him in any such
          capacity, or arising out of the status as such.

          (h) The corporation's obligation to provide indemnification under
          this article shall be offset to the extent of any other source of
          indemnification or any otherwise applicable insurance coverage
          under a policy maintained by the corporation or any other person.

          (i) Without the consent of a person entitled to the
          indemnification and other rights provided in this article, no
          amendment modifying or terminating such rights shall adversely
          affect such person's rights under this article with respect to
          the period prior to such amendment.

          (j) If this Article or any portion thereof shall be invalidated
          on any ground by any court of competent jurisdiction, then the
          corporation shall nevertheless indemnify each Indemnitee as to
          any liabilities and expenses with respect to any action, suit or
          proceedings to the full extent permitted by any applicable
          portion of this article that shall not have been invalidated and
          to the full extent permitted by applicable law.

          (k) As used in this article, the term "director" "officer"
          "employee" "agent" and "person" include their respective heirs,
          executors, administrators and legal representatives and an
          "interested" director is one against whom in such capacity the
          proceedings in question or another proceeding on the same or
          similar grounds is then pending.

     11.  The corporation reserves the right to amend, alter, change or
          repeal any provision contained in this certificate of
          incorporation, in the manner now or hereafter prescribed by
          statute, and all rights conferred upon stockholders herein are
          granted subject to this reservation.

THE UNDERSIGNED incorporator does hereby set his hand this 10th day of
January 1994 for the purpose of forming a corporation under the General
Corporation Law of the state of Delaware.



                                                 /s/ Charles W. Grinnell
                                                 -----------------------
                                                    Charles W. Grinnell




                          CERTIFICATE OF AMENDMENT

                                     OF

                         ARTICLES OF INCORPORATION

                                     OF

                      CLEAN DIESEL TECHNOLOGIES, INC.



THE UNDERSIGNED does hereby certify that Clean Diesel Technologies, Inc.
has duly adopted the following amendment of its articles of incorporation
in accordance with the provisions of Section 242 of the Delaware General
Corporation Law:

          Article 4. of the certificate of incorporation of the Corporation
          be, and it hereby is, revoked in its entirety and the following
          be, and it hereby is, substituted in its place:

          "4. The corporation shall have authority to issue the total
          number of Ten Million (10,000,000) shares of the par value of
          $0.05 per share, amounting in the aggregate to Five Hundred
          Thousand Dollars ($500,000) all of which shall be common stock."

Dated:  October 17, 1994



                                         CLEAN DIESEL TECHNOLOGIES, INC.



                                             By: /s/ Charles W. Grinnell
                                                 -----------------------
                                                    Charles W. Grinnell
                                                      Vice President



                      CERTIFICATE OF AMENDMENT OF THE
                        CERTIFICATE OF INCORPORATION
                     OF CLEAN DIESEL TECHNOLOGIES, INC.

THE UNDERSIGNED does hereby certify that CLEAN DIESEL TECHNOLOGIES, INC., a
corporation organized and existing under the General Corporation Law of the
State of Delaware (the "Corporation"), has duly adopted the following
amendment and restatement of Article 4 of its Amended Certificate of
Incorporation in accordance with the provisions of ss. 242 of the Delaware
General Corporation Law:

     Article 4 of the certificate of incorporation of the Corporation be,
     and it hereby is, amended and restated in its entirety and the
     following, be, and it hereby is, substituted in its place as follows:

          "4. The corporation shall have authority to issue the total
          number of Five Million One Hundred Thousand (5,100,000) shares of
          the par value of $0.05 per share, amounting in the aggregate to
          Two Hundred and Fifty-Five Thousand Dollars ($255,000), Five
          Million (5,000,000) shares of which shall be designated as common
          stock and One Hundred Thousand (100,000) of which shall be
          designated as preferred stock.

          The preferred stock may be issued from time to time in one or
          more series. The Board of Directors is hereby authorized, within
          the limitations and restrictions set forth in this Certificate,
          to issue the preferred stock in one or more series and, in
          connection with the creation of any such series, by resolution or
          resolutions providing for the issue of the shares thereof, to
          determine and fix such voting powers, full or limited, or no
          voting powers, and such designations, preferences and relative,
          participating, optional or other special rights and
          qualifications, limitations or restrictions thereof, including
          without limitation, dividend rights, dividend rates, conversion
          rights, rights and terms of redemption (including sinking fund
          provisions), and the liquidation preferences of any unissued
          series of preferred stock and the number of shares constituting
          any such series; and to increase or decrease the number of shares
          of any series subsequent to the issue of shares of that series,
          but not above the total number of authorized shares of the class
          and not below the number of shares of such series then
          outstanding.

          In case the number of shares of any series shall be so decreased,
          the shares constituting such decrease shall resume the status
          which they had prior to the adoption of the resolution originally
          fixing the number of shares of such series."

     IN WITNESS WHEREOF, the Corporation has caused this Amended and
Restated Certificate of Incorporation to be signed by its Secretary,
Charles W. Grinnell, this 7th day of August, 1995.



                                         CLEAN DIESEL TECHNOLOGIES, INC.



                                       By: /s/Charles W. Grinnell
                                           ------------------------------
                                           Charles W. Grinnell, Secretary


                      CLEAN DIESEL TECHNOLOGIES, INC.

                         CERTIFICATE OF CORRECTION
                                THE AMENDED
                      CERTIFICATE OF INCORPORATION OF
                      CLEAN DIESEL TECHNOLOGIES, INC.



     CLEAN DIESEL TECHNOLOGIES, INC., a corporation organized and existing
under the General Corporation Law of the State of Delaware (the
"Corporation"),

     DOES HEREBY CERTIFY:

     That, Section 4 of the Amended Certificate of Incorporation of Clean
Diesel  Technologies,  Inc.  filed with the Delaware  Secretary of State on
August  5, 1995  (the  "Certificate")  inaccurately  reflected  the  action
adopted by the sole stockholder.  Section 4 of the Certificate  should read
as follows:

     4.   The corporation shall have authority to issue the total number of
          Five Million One Hundred Thousand (5,100,000) shares of the par
          value of $0.05 per share, amounting in the aggregate to Two
          Hundred and Fifty-Five Thousand Dollars ($255,000), Five Million
          (5,000,000) shares of which shall be designated as common stock
          and One Hundred Thousand (100,000) of which shall be designated
          as preferred stock. The preferred stock may be issued from time
          to time in one or more series. The Board of Directors is hereby
          authorized, within the limitations and restrictions set forth in
          this Certificate, to issue the preferred stock in one or more
          series and, in connection with the creation of any such series,
          by resolution or resolutions providing for the issue of the
          shares thereof, to determine and fix such voting powers, full or
          limited, or no voting powers, and such designations, preferences
          and relative, participating, optional or other special rights and
          qualifications, limitations or restrictions thereof, including
          without limitation, dividend rights, dividend rates, conversion
          rights, rights and terms of redemption (including sinking fund
          provisions), and the liquidation preferences of any unissued
          series of preferred stock and the number of shares constituting
          any such series; and to increase or decrease the number of shares
          of any series subsequent to the issue of shares of that series,
          but not above the total number of authorized shares of the class
          and not below the number of shares of such series then
          outstanding. In case the number of shares of any series shall be
          so decreased, the shares constituting such decrease shall resume
          the status which they had prior to the adoption of the resolution
          originally fixing the number of shares of such series. In no
          event, however, may the board of Directors issue preferred stock
          which has the effect of voting as a class during the tendering of
          an offer to purchase 51% or more of the voting securities of the
          Company.

     IN WITNESS WHEREOF, the Corporation has caused this Certificate of
Correction to be signed by its Secretary, Charles W. Grinnell, this _______
day of August, 1995.



                                         CLEAN DIESEL TECHNOLOGIES, INC.



                                      By: /s/Charles W. Grinnell
                                          -------------------------------
                                          Charles W. Grinnell, Secretary



                      CERTIFICATE OF AMENDMENT OF THE
                        CERTIFICATE OF INCORPORATION
                     OF CLEAN DIESEL TECHNOLOGIES, INC.

THE UNDERSIGNED does hereby certify that CLEAN DIESEL TECHNOLOGIES, INC., a
corporation organized and existing under the General Corporation Law of the
State of Delaware  (the  "Corporation"),  has duly  adopted  the  following
amendment of Article 4 of its  Certificate of  Incorporation  in accordance
with the provisions of ss. 242 of the Delaware General Corporation Law:

          Article 4 of the certificate of incorporation of the Corporation
          be, and it hereby is, amended by revoking in its entirety the
          first paragraph of said Article 4 and the following being, and it
          hereby is, substituted in its place, as follows:

          "4 The corporation shall have authority to issue the total number
          of Fifteen Million One Hundred Thousand (15,100,000) shares of
          the par value of $0.05 per share, amounting in the aggregate to
          Seven Hundred Fifty Five Thousand Dollars ($755,000), and of such
          shares Fifteen Million (15,000,000) shall be designated as common
          stock and One Hundred Thousand (100,000) shall be designated as
          preferred stock."

     IN WITNESS WHEREOF, the Corporation has caused this Certificate of
Amendment of Certificate of Incorporation to be signed by its Secretary,
Charles W. Grinnell, this 17th day of June 1998.

                                    CLEAN DIESEL TECHNOLOGIES, INC.

                                    By: /s/ Charles W. Grinnell
                                        --------------------------------
                                         Charles W. Grinnell, Secretary

                                                               Exhibit 3(i)(c)


                   FORM OF CERTIFICATE OF DESIGNATION OF
                    SERIES B CONVERTIBLE PREFERRED STOCK
                     OF CLEAN DIESEL TECHNOLOGIES, INC.


          Pursuant to Section 151 of the General Corporation Law of the
state of Delaware, Clean Diesel Technologies, Inc. (the "Corporation"), a
corporation organized and existing under the General Corporation Law of the
state of Delaware, in accordance with the provisions of Section 103
thereof, DOES HEREBY CERTIFY:

          That pursuant to the authority conferred upon the Board of
Directors of the Corporation (the "Board") in Article 4 of the Certificate
of Incorporation of the Corporation, as amended (the "Certificate of
Incorporation"), and in accordance with the provisions of Section 151 of
the General Corporation Law of the state of Delaware, the Board on ______
__, 1998, adopted the following resolution creating a series of preferred
stock designated as Series B Convertible Preferred Stock.

          RESOLVED, that, pursuant to the authority expressly granted and
vested in the Board by the provisions of the Certificate of Incorporation,
there hereby is created, out of the 100,000 shares of preferred stock,
$0.05 par value per share, authorized in Article 4 of the Certificate of
Incorporation (the "Preferred Stock"), a series (the "Series") of the
Preferred Stock consisting of 50,000 shares, which Series shall have the
following powers, designations, preferences and relative, participating,
optional or other special rights, and the qualifications, limitations or
restrictions.

          Section 1. Designation and Size of Issue; Ranking. (a) The
designation of this Series shall be "Series B Convertible Preferred Stock"
("Convertible Preferred Stock"). The number of shares of this Series shall
be 50,000 registered shares, $0.05 par value per share. The price and
liquidation preference (the "Liquidation Preference") of shares of this
Series shall be $______ per share.

          (b) The shares of Convertible Preferred Stock shall rank senior
to all other classes of equity securities of the Corporation as to the
payment of dividends and the distribution of assets upon liquidation,
dissolution or winding up, unless the terms of such equity securities
provide otherwise.

          Section 2. Dividends. (a) The Holders of record shall be entitled
to receive, when, as and if declared by the Board out of funds of the
Corporation legally available therefor, cash dividends at the annual rate
of 9% of the Liquidation Preference of each share; provided, however, that
in lieu of making dividends in cash, the Corporation may elect, by giving
written notice to each Holder, to pay dividends in kind at the annual rate
of 11% of the Liquidation Preference (cash dividends and dividends in kind
are each deemed "Preferred Dividends"). Dividends payable to the Holders
are payable quarterly in arrears, on the first business day of January,
April, July and October of each year (each such date being hereinafter
referred to as a "Dividend Payment Date"), commencing __________. Preferred
Dividends on shares of Convertible Preferred Stock shall be cumulative and
shall accrue from the date of original issuance. Preferred Dividends shall
be payable to Holders of record as they appear on the stock register of the
Corporation on such record dates, not less than 15 nor more than 60 days
preceding the Dividend Payment Date thereof, as shall be fixed by the
Board. Preferred Dividends (or amounts equal to accrued and unpaid
Preferred Dividends) payable on shares of Convertible Preferred Stock for
any period less than a full quarterly dividend period (or, in the case of
the first Preferred Dividend, from the date of initial issuance of the
shares of Convertible Preferred Stock to, but excluding, the first Dividend
Payment Date) shall be computed on the basis of a 360-day year of twelve
30-day months and the actual number of days elapsed in any period less than
one month. Preferred Dividends shall accrue on a daily basis whether or not
there are funds of the Corporation legally available for the payment of
such dividends and whether or not such Preferred Dividends are declared.
Accrued but unpaid Preferred Dividends shall accrue as of the Dividend
Payment Date on which they first become payable, but no interest shall
accrue on accumulated but unpaid Preferred Dividends.

          (b) Any dividend payment made on the shares of Convertible
Preferred Stock shall first be credited against the earliest accrued but
unpaid dividend due with respect to the shares of Convertible Preferred
Stock.

          Section 3. Conversions.

          (a) Conversion at Option of a Holder. Shares of Convertible
Preferred Stock are convertible (at the Liquidation Preference of $______
per share), in whole or in part, at the option of the Holder thereof
("Optional Conversion"), unless previously redeemed, into shares of Common
Stock, par value of $0.05 ("Common Stock"), at a conversion price of $_____
per share of Common Stock (equivalent to a conversion rate of 33 shares of
Common Stock for each share of Convertible Preferred Stock so converted),
which conversion price will be deemed to have been paid in full, at no
extra cost to the Holder thereof, with the tendering of the Convertible
Preferred Stock in connection with the conversion thereof, subject to
adjustment as set forth below (the "Conversion Price") .

          Optional Conversion of shares of Convertible Preferred Stock may
be effected by delivering certificates evidencing such shares of
Convertible Preferred Stock, together with written notice of conversion and
a proper assignment of such certificates to the Corporation or in blank, to
the office of the transfer agent for the shares of Convertible Preferred
Stock or to any other office or agency maintained by the Corporation for
that purpose and otherwise in accordance with Optional Conversion
procedures established by the Corporation. Each Optional Conversion shall
be deemed to have been effected immediately before the close of business on
the date on which the foregoing requirements shall have been satisfied. The
Optional Conversion shall be at the Conversion Price in effect at such time
and on such date.

          The Holders at the close of business on a record date for any
payment of declared Preferred Dividends shall be entitled to receive the
Preferred Dividend payable on such shares of Convertible Preferred Stock on
the corresponding Dividend Payment Date notwithstanding the Optional
Conversion of such shares of Convertible Preferred Stock following such
record date and before such Dividend Payment Date. However, shares of
Convertible Preferred Stock surrendered for Optional Conversion after the
close of business on a record date for any payment of declared Preferred
Dividends and before the opening of business on the next succeeding
Dividend Payment Date must be accompanied by payment to the Corporation in
cash of an amount equal to the Preferred Dividends on such shares of
Convertible Preferred Stock to be converted attributable to the current
quarterly dividend period payable on such date. A Holder on any Dividend
Payment Date will receive the dividend on such shares of Convertible
Preferred Stock payable on that date and will be able to convert such
shares of Convertible Preferred Stock after the record date for such
dividend without paying an amount equal to such dividend to the Corporation
upon the Optional Conversion. Except as provided above, upon any Optional
Conversion of shares of Convertible Preferred Stock, the Corporation shall
make no payment of or allowance for unpaid Preferred Dividends, whether or
not in arrears on such shares of Convertible Preferred Stock as to which
Optional Conversion has been effected or for previously declared dividends
or distributions on the shares of Common Stock issued upon Optional
Conversion.

          (b) Conversion at the Option of the Corporation. The Corporation
can force the Holder to convert his Convertible Preferred Stock, in whole
or in part, into shares of Common Stock at any time on or after the date
that the average Closing Price (as defined in Section 12) of the shares of
Common Stock equal or exceed $4.50 for 20 consecutive Trading Days. Such
conversion may at the election of the Holders of 60% of the issued and
outstanding shares of this Series B Convertible Preferred Stock be
scheduled to occur, on a pro rata basis quarterly over 18 months.

          (c) Mandatory Conversion. Subject to the provision for adjustment
set forth below, each share of Convertible Preferred Stock shall be
automatically converted into a number of shares of Common Stock at the
Conversion Price in the event that the Corporation consummates a Qualified
IPO (as defined in Section 12) (such event, a "Mandatory Conversion"). In
the event of a Mandatory Conversion, accrued and unpaid dividends will also
convert into shares of Common Stock, on the same terms as the underlying
Preferred Stock.

          (d) Deemed Issuance of Additional Common Stock. The shares of
Common Stock ultimately Issuable (as defined in Section 12) upon exercise
of an option (including the shares of Common Stock ultimately Issuable upon
conversion or exercise of a Convertible Security (as defined in Section 12)
Issuable pursuant to an option) are deemed to be Issued when the option is
Issued. The shares of Common Stock ultimately Issuable upon conversion or
exercise of a Convertible Security (other than a Convertible Security
Issued pursuant to an option) shall be deemed Issued upon Issuance of the
Convertible Security. The maximum number of shares of Common Stock Issuable
is determined without regard to any future adjustments permitted under the
instrument creating the options or Convertible Securities.

          (e) Adjustment of Conversion Price for Diluting Issuances.

               (i) Weighed Average Adjustment. If the Corporation Issues
     additional Common Stock after the original Issuance date of the
     Convertible Preferred Stock and the consideration per share of
     additional Common Stock (determined pursuant to this Section 3(f)) is
     less than the Conversion Price in effect immediately before such
     Issue, the Conversion Price in effect immediately before such Issue
     shall be reduced, concurrently with such Issue, to a price (calculated
     to the cent) determined by multiplying the Conversion Price by a
     fraction:

                    (A) the numerator of which is the number of shares of
          Common Stock outstanding immediately before such Issue plus the
          number of shares of Common Stock that the aggregate consideration
          received by the Corporation for such additional Common Stock
          would purchase at the Conversion Price in effect immediately
          before such Issue, and

                    (B) the denominator of which is the number of shares of
          Common Stock outstanding immediately before such Issue plus the
          number of shares of such additional Common Stock.

               (ii) Adjustment of Number of Shares. Upon each adjustment of
     the Conversion Price, the number of shares of Common Stock issuable
     upon conversion of the Convertible Preferred Stock shall be increased
     to equal the quotient obtained by dividing (a) the product resulting
     from multiplying (x) the number of shares of Common Stock issuable
     upon conversion of the Convertible Preferred Stock and (y) the
     Conversion Price, in each case as in effect immediately before such
     adjustment, by (b) the adjusted Conversion Price.

               (iii) Securities Deemed Outstanding. For the purpose of this
     Section 3, all securities issuable upon exercise of any outstanding
     Convertible Securities or options, warrants, or other rights to
     acquire securities of the Corporation shall be deemed to be
     outstanding.

          (f) No Adjustment for Issuances Following Deemed Issuances. No
adjustment to the Conversion Price shall be made upon the exercise of
options or conversion of Convertible Securities.

          (g) Adjustment Following Changes in Terms of Options or
Convertible Securities. If the consideration payable to, or the number of
shares of Common Stock Issuable by, the Corporation increases or decreases,
respectively, pursuant to the terms of any outstanding options or
Convertible Securities, the Conversion Price shall be recomputed to reflect
such increase or decrease. The recomputation shall be made as of the time
of the Issuance of the options or Convertible Securities. Any changes in
the Conversion Price that occurred after such Issuance because other shares
of additional Common Stock were Issued or deemed Issued shall also be
recomputed.

          (h) Recomputation Upon Expiration of Options or Convertible
Securities. The Conversion Price computed upon the original Issue of any
options or Convertible Securities, and any subsequent adjustments based
thereon, shall be recomputed when any options or rights of conversion under
Convertible Securities expire without having been exercised. In the case of
Convertible Securities or options for Common Stock, the Conversion Price
shall be recomputed as if the only shares of additional Common Stock Issued
were the shares of Common Stock actually Issued upon the exercise of such
securities, if any, and as if the only consideration received therefor was
the consideration actually received upon the Issue, exercise or conversion
of the options or Convertible Securities. In the case of options or
Convertible Securities, the Conversion Price shall be recomputed as if the
only Convertible Securities Issued were the Convertible Securities actually
Issued upon the exercise thereof, if any, and as if the only consideration
received therefor was the consideration actually received by the
Corporation (determined pursuant to Section 3(f)), if any, upon the Issue
of the options for the Convertible Securities.

          (i) Limit on Readjustments. No readjustment of the Conversion
Price pursuant to Section 3(h) or 3(i) shall increase the Conversion Price
more than the amount of any decrease made in respect of the Issue of any
options or Convertible Securities.

          (j) 30-Day Options. In the case of any options that expire by
their terms not more than 30 days after the date of Issue thereof, no
adjustment of the Conversion Price shall be made until the expiration or
exercise of all such options.

          (k) Computation of Consideration. The consideration received by
the Corporation for the Issue of any additional Common Stock shall be
computed as follows:

               (i) Cash. Cash shall be valued at the amount of cash
     received by the Corporation, excluding amounts paid or payable for
     accrued interest or accrued dividends.

               (ii) Property. Property other than cash shall be computed at
     the fair market value thereof at the time of the Issue as determined
     in good faith by the Board.

               (iii) Mixed Consideration. The consideration for additional
     Common Stock Issued together with other property of the Corporation
     for consideration that covers both shall be determined in good faith
     by the Board.

               (iv) Options and Convertible Securities. The consideration
     per share of additional Common Stock for options and Convertible
     Securities shall be determined by dividing:

                    (A) the total amount, if any, received or receivable by
          the Corporation for the Issue of the options or Convertible
          Securities, plus the minimum amount of additional consideration
          (as set forth in the instruments relating thereto; without regard
          to any provision contained therein for a subsequent adjustment of
          such consideration) payable to the Corporation upon exercise of
          the options or conversion of the Convertible Securities, by

                    (B) the maximum number of shares of Common Stock (as
          set forth in the instruments relating thereto, without regard to
          any provision contained therein for a subsequent adjustment of
          such number) ultimately Issuable upon the exercise of such
          options or the conversion of such Convertible Securities.

          (l) Stock Dividends. In case at any time the Corporation shall
declare a dividend or make any other distribution upon any stock of the
Corporation which is payable in Common Stock or Convertible Securities, any
Common Stock or Convertible Securities, as the case may be, issuable in
payment of such dividend or distribution shall be deemed to have been
issued or sold without consideration.

          (m) Adjustment for Certain Special Dividends. In case the
Corporation shall declare a dividend upon the Common Stock payable
otherwise than out of earnings or earned surplus, determined in accordance
with generally accepted accounting principles, and otherwise than in Common
Stock or Convertible Securities, the Conversion Price in effect immediately
subsequent to the declaration of such dividend shall be determined by
subtracting from the Conversion Price in effect immediately prior to such
declaration the amount of cash (or, if the distribution is for property
other than cash, the fair market value of such property determined
reasonably and in good faith by the Board) distributed in respect of one
share of Common Stock. For the purpose of the foregoing, a dividend other
than in cash shall be considered payable out of earnings or earned surplus
(other than revaluation of paid in surplus) only to the extent that such
earnings or earned surplus are charged an amount equal to the fair value of
such dividend as determined, reasonably and in good faith, by the Board.
Such reductions shall take effect as of the date on which a record is taken
for the purpose of such dividend, or, if a record is not taken, the date as
of which the holder of Common Stock of record entitled to such dividend are
determined.

          (n) Subdivision or Combination of Stock. In case the Corporation
shall at any time subdivide the outstanding shares of Common Stock into a
greater number of shares, the Conversion Price in effect immediately prior
to such subdivision shall be proportionately reduced and the number of
shares issuable upon conversion of the Convertible Preferred Stock
immediately prior to such subdivisions shall be proportionately increased,
and conversely, in case the outstanding shares of Common Stock shall be
combined at any time into a smaller number of shares, the Conversion Price
in effect immediately prior to such combination shall be proportionately
increased and the number of shares issuable upon conversion of the
Convertible Preferred Stock immediately prior to such combination shall be
proportionately reduced.

          (o) Adjustments for Consolidation, Merger, Sale of Assets,
Reorganization, etc. In case the Corporation (i) consolidates with or
merges into any other corporation and is not the continuing or surviving
corporation of such consolidation or merger, or (ii) permits any other
corporation to consolidate with or merge into the Corporation and the
Corporation is the continuing or surviving corporation but, in connection
with such consolidation or merger, the Common Stock is changed into or
exchanged for stock or other securities of any other corporation or cash or
any other assets, or (iii) transfers all or substantially all of its
properties and assets to any other corporation, or (iv) effects a capital
reorganization or reclassification of the capital stock of the Corporation
in such a way that holders of Common Stock shall be entitled to receive
stock, securities, cash or assets with respect to or in exchange for Common
Stock, then, and in each such case, proper provision shall be made so that,
upon the basis and upon the terms and in the manner provided in this
Section 3(p), upon the conversion of the Convertible Preferred Stock at any
time after the consummation of such consolidation, merger, transfer,
reorganization or reclassification, each Holder shall be entitled to
receive (at the Conversion Price in effect for shares issuable upon such
conversion of the Convertible Preferred Stock immediately prior to such
consummation), in lieu of shares issuable upon such conversion of the
Convertible Preferred Stock prior to such consummation, the stock and other
securities, cash and assets to which such Holder would have been entitled
upon such consummation if such Holder had so converted such Convertible
Preferred Stock immediately prior thereto (subject to adjustments
subsequent to such corporate action as nearly equivalent as possible to the
adjustments provided for in this Section 3).

          (p) Notice of Adjustment. Whenever the number of shares issuable
upon the conversion of the Convertible Preferred Stock or the Conversion
Price is adjusted, as provided in this Section 3, the Corporation shall
prepare and mail to each Holder a certificate setting forth (i) the
Conversion Price and the number of shares issuable upon the conversion of
the Convertible Preferred Stock after such adjustment, (ii) a brief
statement of the facts requiring such adjustment and (iii) the computation
by which such adjustment was made.

          (q) Treasury Shares. The number of shares of Common Stock
outstanding at any given time shall not include shares of Common Stock
owned or held by or for the account of the Corporation. The disposition of
any shares of Common Stock owned or held by or for the account of the
Corporation shall be considered an issue of Common Stock for the purpose of
this Section 3.

          (r) Certain Adjustment Rules.

               (i) The provisions of this Section 3 shall similarly apply
     to successive transactions.

               (ii) If the Corporation shall declare any dividend referred
     to in Section 3 (m) or Section 3 (n) and if any Holder converts all or
     any part of the Convertible Preferred Stock after such declaration,
     but before the payment of such dividend, the Corporation may elect to
     defer, until the payment of such dividend, issuing to such Holder the
     shares of Common Stock issuable upon such conversion over and above
     the shares issuable upon such conversion on the basis of the
     Conversion Price in effect prior to such adjustment; provided,
     however, that the Corporation shall deliver to each such Holder a due
     bill or other appropriate instrument evidencing such Holder's right to
     receive such additional shares upon the payment of such dividend.

               (iii) If the Corporation shall declare any dividend referred
     to in Section 3(m) or Section 3(n) and shall legally abandon such
     dividend prior to payment, then no adjustment shall be made pursuant
     to this Section 3 in respect of such declaration.

          (s) Exceptions to Adjustment to Conversion Price. Notwithstanding
anything herein to the contrary, no adjustment to the Conversion Price or
the number of shares issuable upon exercise of the Warrants shall be made
in the case of the following:

               (i) the issuance of any shares of Common Stock upon
     conversion of the Convertible Preferred Stock;

               (ii) the grant of options or stock awards to purchase or
     acquire Common Stock to employees, officers or directors of the
     Corporation, or the adjustment of the exercise price thereof pursuant
     to the Corporation's 1994 Incentive Plan or any successor plan or
     plans thereto (the "Plan"); and

               (iii) the issuance of shares of Common Stock to any
     employees, officers or directors of the Corporation upon the exercise
     or settlement of any stock award to purchase or acquire Common Stock
     granted pursuant to the Plan.

          Section 4. No Fractional Shares. No fractional shares or script
representing fractional shares of Common Stock shall be issued upon
conversion of any shares of Convertible Preferred Stock. In lieu of any
fractional share otherwise issuable in respect of the aggregate number of
shares of Convertible Preferred Stock of any holder that are converted on
any Optional Conversion, such holder shall be entitled to receive an amount
in cash (computed to the nearest cent) equal to the same fraction of the
Closing Price of the Common Stock determined as of the second Trading Day
(as defined in Section 12) immediately preceding the effective date of
conversion. If more than one share of Convertible Preferred Stock shall be
surrendered for conversion at one time by or for the same holder, the
number of full shares of Common Stock issuable upon conversion thereof
shall be computed on the basis of the aggregate number of shares of the
Convertible Preferred Stock so surrendered.

          Section 5. Reservation of Common Stock. The Corporation shall at
all times reserve and keep available out of its authorized and unissued
Common Stock, solely for issuance upon the conversion of shares of
Convertible Preferred Stock, as herein provided, free from preemptive
rights, such maximum number of shares of Common Stock as shall from time to
time be issuable upon the Optional Conversion of all the shares of
Convertible Preferred Stock then outstanding.

          Section 6. Payment of Taxes. The Corporation shall pay any and
all documentary, stamp or similar issue or transfer taxes payable in
respect of the issue or delivery of shares of Common Stock on the
conversion of shares of Convertible Preferred Stock pursuant to Section 3;
provided, however, that the Corporation shall not be required to pay any
tax which may be payable in respect of any registration of transfer
involved in the issue or delivery of shares of Common Stock in a name other
than that of the registered holder of shares of Convertible Preferred Stock
converted or to be converted, and no such issue or delivery shall be made
unless and until the person requesting such issue has paid to the
Corporation the amount of any such tax or has established, to the
satisfaction of the Corporation, that such tax has been paid.

          Section 7. Liquidation Preference. In the event of any voluntary
or involuntary liquidation, dissolution, or winding up of the Corporation,
and subject to the rights of holders of any other series of Preferred
Stock, the holders of outstanding shares of Convertible Preferred Stock are
entitled to receive the sum of $_______ per share in cash for each share of
Convertible Preferred Stock, plus accrued and unpaid Preferred Dividends
thereon, out of the assets of the Corporation available for distribution to
stockholders, before any distribution of assets is made to holders of
Common Stock or any other capital stock ranking junior to the shares of
Convertible Preferred Stock upon liquidation, dissolution, or winding up.
If, upon any voluntary or involuntary liquidation, dissolution, or winding
up of the Corporation, the assets of the Corporation are insufficient to
permit the payment of the full preferential amounts payable with respect to
the shares of Convertible Preferred Stock, the Holders shall share ratably
in any distribution of assets of the Corporation in proportion to the full
respective preferential amounts to which they are entitled, in each case on
a per share basis. After payment of the full amount of the liquidating
distribution to which they are entitled, the Holders shall not be entitled
to any further participation in any distribution of assets by the
Corporation. A consolidation or merger of the Corporation with or into one
or more other corporations (whether or not the Corporation is the
corporation surviving such consolidation or merger), or a sale, lease or
exchange of all or substantially all of the assets of the Corporation shall
not be deemed to be a voluntary or involuntary liquidation, dissolution, or
winding up of the Corporation.

          Section 8. Effect of Conversions. The person or persons in whose
name or names any certificate or certificates for shares of Common Stock
shall be issuable upon any conversion shall be deemed to have become on the
date of any such conversion the holder or holders of record of the shares
represented thereby; provided, however, that if any surrender on any date
when the stock transfer books of the Corporation shall be closed the person
or persons in whose name or names the certificate or certificates for such
shares are to be issued shall be the record holder or holders thereof for
all purposes at the opening of business on the next succeeding day on which
such stock transfer books are open.

          Section 9. Reissuance. Shares of Convertible Preferred Stock that
have been issued and reacquired by the Corporation in any manner, including
shares purchased, exchanged, redeemed or converted, shall not be reissued
as part of such Series and shall (upon compliance with any applicable
provisions of the laws of Delaware) have the status of authorized and
unisssued shares of the Preferred Stock undesignated as to series and may
be redesignated and reissued as part of any other series of Preferred
Stock.

          Section 10. Severability of Provisions. Whenever possible, each
provision hereof shall be interpreted in a manner as to be effective and
valid under applicable law, but if any provision hereof is held to be
prohibited by or invalid under applicable law, such provision shall be
ineffective only to the extent of such prohibition or invalidity, without
invalidating or otherwise adversely affecting the remaining provisions
hereof. If a court of competent jurisdiction should determine that a
provision hereof would be valid or enforceable if a period of time were
extended or shortened or a particular percentage were increased or
decreased, then such Court may make such change as shall be necessary to
render the provision in question effective and valid under applicable law.

          Section 11. Voting Rights. The Holders shall be entitled to vote
on all matters and shall be entitled to the number of votes per share of
Convertible Preferred Stock equal to the number of votes per share a holder
of the shares of Common Stock into which Convertible Preferred Stock is
convertible is entitled to, at the record date for the determination of the
stockholders entitled to vote on all matters. Except as required by law, or
as otherwise provided in this Section 11, the holders of shares of
Preferred Stock and Common Stock shall vote together as a single class and
not as separate classes.

          Section 12. Definitions. As used herein:

               (i) the term "business day" shall mean any day other than a
     Saturday, Sunday, or a day on which banking institutions in the state
     of New York are authorized or obligated by law or executive order to
     close or are closed because of a banking moratorium or otherwise;

               (ii) the term "Change of Control" shall mean that a person
     or group of persons (other than Fuel-Tech N.V. ("FTNV") and/or its
     affiliates and other persons acting with or on behalf of FTNV and/or
     its affiliates) shall, as a result of a tender or exchange offer, open
     market purchases, privately negotiated purchases or otherwise, have
     become, directly or indirectly, the beneficial owner of more than 50%
     of the Corporation's outstanding Common Stock;

               (iii) the term "Closing Price" shall mean (1) if the Common
     Stock is listed on one or more stock exchanges or is quoted on the
     NASDAQ National Market (the "National Market"), the average of the
     closing sales prices of a share of Common Stock on the primary
     national or regional stock exchange on which such shares are listed or
     on the National Market if quoted thereon or (2) if the Common Stock is
     not so listed or quoted but is traded in the over the counter market
     (other than the National Market), the average of the closing bid and
     asked prices of a share of Common Stock, in the case of clauses (1)
     and (2), for the 20 Trading Days (or such lesser number of trading
     days as the Common Stock shall have been so listed, quoted or traded)
     immediately prior to the date of measurement ((l) or (2), the
     "Principal Trading Market").

               (iv) the term "Convertible Securities" shall mean any
     evidences of indebtedness, shares of stock, or other securities
     directly or indirectly convertible into or exchangeable for Common
     Stock.

               (v) the term "Issue" means to grant, issue, sell, assume or
     fix a record date for determining persons entitled to receive, any
     security (including options), whichever of the foregoing is first to
     occur;

               (vi) the term "Qualified IPO" shall mean the closing of the
     sale of shares of Common Stock in a bona fide, firm commitment,
     underwritten public offering pursuant to an effective registration
     statement under the Securities Act of 1933, as amended, (i) resulting
     in at least $10,000,000 of gross proceeds at a price per share of at
     least 200% of the Conversion Price being received by the Company;

               (vii) the term "record date" shall be such date as from time
     to time fixed by the Board of Directors with respect to the receipt of
     dividends, the receipt of a redemption price upon redemption or the
     taking of any action or exercise of any voting rights permitted
     hereby; and

               (viii) the term "Trading Day" shall mean any day during
     which the Principal Market shall be open for business and the
     Company's Common Stock shall have traded on such Principal Market.

          Section 13. Transferability. No Holder of shares of this Series B
Convertible Preferred Stock shall directly or indirectly, sell, distribute,
transfer, assign, pledge, hypothecate or otherwise dispose of or encumber
any of such shares or any shares of Common Stock issuable upon the
conversion of such shares, unless such transfer is made pursuant to either
(i) an effective registration statement under the Securities Act of 1933,
as amended, and any applicable state securities laws, or (ii) an available
exemption from the registration requirements of the Securities Act of 1933
and applicable state securities laws. Certificates representing shares of
Series B Preferred Stock will include a legend to the effect that such
securities may not be transferred to any residents of any of the following
states: Arizona, Florida, Georgia, Ohio, Pennsylvania or Texas.

          IN WITNESS WHEREOF, Clean Diesel Technologies, Inc. has caused
this Certificate of Designation to be signed this ___ day of _____, 1998.

                                       CLEAN DIESEL TECHNOLOGIES, INC.

                                       By:
                                          ----------------------------
                                          Name: Charles W. Grinnell
                                          Title: Vice President


                                                                    Exhibit 4b

THE RIGHTS WILL ONLY BE GRANTED TO, AND MAY ONLY BE EXERCISED BY, INVESTORS
RESIDING IN THE FOLLOWING JURISDICTIONS WHERE THE SECURITIES OFFERED HEREBY
HAVE BEEN REGISTERED WITH THE APPROPRIATE SECURITIES REGULATORY AUTHORITIES
OR WHERE AN EXEMPTION FROM SUCH REGISTRATION IS AVAILABLE: OUTSIDE THE
UNITED STATES AND IN COLORADO, CONNECTICUT, THE DISTRICT OF COLUMBIA,
ILLINOIS, INDIANA, IOWA, KANSAS, MAINE, MARYLAND, MASSACHUSETTS, NEVADA,
NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND, VERMONT, VIRGINIA AND
WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS WHO RESIDE IN STATES
WHERE THE SECURITIES OFFERED HEREBY HAVE NOT BEEN REGISTERED OR WHERE AN
EXEMPTION FROM REGISTRATION IS NOT AVAILABLE. IN ADDITION, THE SERIES B
PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS OF ANY OF THE FOLLOWING
STATES: ARIZONA, FLORIDA, GEORGIA, OHIO, PENNSYLVANIA OR TEXAS

           THE RIGHTS EVIDENCED HEREBY WILL EXPIRE AT 5:00 P.M.,
         EASTERN TIME, ON ________ __, 1998 (UNLESS EXTENDED PRIOR
               TO THAT DATE) AND WILL BE VALUELESS THEREAFTER
                            (See Reverse hereof)



Certificate                 SUBSCRIPTON CERTIFICATE            Certificate for
No. ___               Evidencing Right to Purchase Shares         _____ Rights
                  of Series B Convertible Preferred Stock
                                     of
                      CLEAN DIESEL TECHNOLOGIES, INC.

                  Incorporated under the laws of Delaware

THE  TERMS  AND  CONDITIONS  OF THE  RIGHTS
OFFERING  ARE SET FORTH IN THE COMPANY'S
PROSPECTUS  DATED ________ __, 1998 (THE
"PROSPECTUS")  AND ARE INCORPORATED  HEREIN
BY REFERENCE.  COPIES OF THE  PROSPECTUS ARE
AVAILABLE UPON REQUEST FROM CHASEMELLON
SHAREHOLDER SERVICES, L.L.C., AS SUBSCRIPTION
AGENT.

THIS CERTIFIES THAT

is the  registered  owner of the number of Rights set forth above,  each of
which  entitles  the owner to  subscribe  to purchase one share of Series B
Convertible  Preferred  Stock,  par value  $0.05 per share  (the  "Series B
Preferred   Stock")  of  Clean  Diesel   Technologies,   Inc.,  a  Delaware
corporation (the  "Company"),  for each Right held. The price to be paid to
exercise each Right is $____.

          The Rights are exercisable until 5:00 p.m., Eastern Time, on
______ __, 1998 (the "Expiration Date") unless extended by the Board of
Directors of the Company, in which case the term "Expiration Date" shall
mean the latest date and time to which the Rights Offering is extended. The
Rights are only exercisable upon the terms specified herein and in the
Subscription Agent Agreement between the Company and the Subscription Agent
dated _______ __, 1998. The exercise of all of the Rights represented by
this certificate shall also entitle the holder to exercise Oversubscription
Privileges to purchase Shares not purchased by the other holders of Rights,
as more fully described in the Subscription Agent Agreement and described
in the Prospectus.

          The holder of this Rights Certificate, as such, shall not be
entitled to vote or receive dividends or be deemed for any purpose the
holder of the Series B Preferred Stock which may at any time be issuable
upon the exercise hereof or the Common Shares, par value $0.05 per Common
Share, into which the Series B Preferred Stock is convertible, nor shall
anything contained herein be construed to confer upon the holder hereof, as
such, any of the rights of a stockholder of the Company or any right to
vote for the election of directors or upon any matter submitted to
stockholders at any meeting of the Company, or to give or withhold consent
to any corporate action, or, to receive notice of meetings or other actions
affecting stockholders, or otherwise, until all or a portion of the Rights
evidenced by this Rights Certificate have been exercised and the shares of
Series B Preferred Stock have been issued.

          This Certificate shall not be valid for any purpose unless
countersigned by the Subscription Agent.

          WITNESS the facsimile seal of the Company and facsimile signature
of the proper officers thereof.

          DATED: ______ __, 1998 CLEAN DIESEL TECHNOLOGIES, INC.



COUNTERSIGNED:                      By:
                                       --------------------------------
                                                   President



ChaseMellon Shareholder Services, L.L.C.
       as Subscription Agent



By:                                 Attest:
                                           ----------------------------
        Authorized Signature                        Treasurer





                           (REVERSE)
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =


                  SECTION 1 - BASIC SUBSCRIPTION EXERCISE

TO EXERCISE THE BASIC SUBSCRIPTION  PRIVILEGE,  complete this Section 1 and
Section  3 below  and  return  this  Subscription  Certificate,  with  your
payment,  to ChaseMellon  Shareholder  Services,  L.L.C. at the address set
forth in Section 3.

Number of Rights Exercised:
                            ------------------------------------------------
                           (Note:  No fractional Rights may be exercised)

Payment due on exercise of Basic Subscription Privilege is number of Rights
exercised x $_____ per Right = $____________.


= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =


                   SECTION 2 - OVERSUBSCRIPTION EXERCISE

TO EXERCISE THE OVERSUBSCRIPTION PRIVILEGE, complete this Section 2 as well
as  Section 1 and  Section  3. You may not  exercise  the  Oversubscription
Privilege (i) if you are a transferee of the Rights evidenced hereby or, in
the case of securities held in street name, the particular beneficial owner
is a  transferee  thereof,  and (ii) unless you have  exercised  your Basic
Subscription Privilege in full or, in the case of securities held in street
name, the particular  beneficial owner has exercised its Basic Subscription
Privilege in full. (The actual number of shares available for purchase will
depend  upon the number of basic  Rights  exercised  by all holders and the
other  shareholders  exercising  the  Oversubscription  Privilege,  and  is
subject to proration as set forth in the  Subscription  Agent Agreement and
described in the Prospectus.)

Number of Shares Subscribed For:_________________________________

Payment due on exercise of  Oversubscription  Privilege is number of Shares
subscribed for x $_____ per Share = $__________.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =



           SECTION 3 - PAYMENT INSTRUCTIONS; REPRESENTATIONS AND
                       WARRANTIES AND CERTIFICATIONS

                Payment in Full For All Shares Subscribed For
        Under Section 1 and Section 2 Must Accompany this Certificate

Total payment* due under Section1 plus Section 2 = $_______________. (*Make
your check payable to ChaseMellon Shareholder Services, L.L.C.)

I hereby represent,  warrant and certify that (i) I have been provided with
a copy of the Prospectus, (ii) I reside outside the United States or in one
of the following  states:  [to come]* and (iii) I hereby tender  payment of
the purchase  price for the shares  sought to be  purchased.  *(NOTE - this
Subscription  Certificate  may NOT be  exercised by holders who cannot make
this representation, warranty and certifications)

IMPORTANT - RIGHTS HOLDERS SIGN HERE AND, IF RIGHTS ARE EXERCISED, COMPLETE
SUBSTITUTE FORM W-9
Authorized Signature(s) of Subscriber(s):
                                          ------------------------------------

Print Name(s): 
              ----------------------------------------------------------------

Address: 
          --------------------------------------------------------------------
                            (Including Zip Code)

Telephone Number(s):  (_____)   __________________    (_____)
                                                              
Tax Identification or Social Security No(s).:
                                             ---------------------------------

(Must be signed by the Rights  holder(s)  exactly as name(s)  appear(s)  on
this Subscription Certificate. If signature is by trustee(s),  executor(s),
administrator(s), guardian(s), attorney(s)-in-fact, agent(s), officer(s) of
a corporation or another acting as a fiduciary or representative  capacity,
please provide the following information. See Instructions.)

Authorized Signature(s):
                         -----------------------------------------------------
Print Name(s):
              ----------------------------------------------------------------

Capacity:
          --------------------------------------------------------------------

Address:
         ---------------------------------------------------------------------
                         (Including Zip Code)

Telephone Number(s):
                    ----------------------------------------------------------

Tax Identification or
Social Security No.:
                    ----------------------------------------------------------
                           (Complete Substitute Form W-9)

Please mail, deliver or wire transfer cash, check or money order payable to
ChaseMellon Shareholder Services, L.L.C., P.O. Box 3301, South Hackensack,
NJ 07606, for the total amount due to the Subscription Agent at the
appropriate address below:

By Overnight or Express Delivery,
By Hand Delivery, or First Class Mail:       By Facsimile Transmissions:
ChaseMellon Shareholder Services, L.L.C.     ChaseMellon Shareholder Services,
L.L.C.
85 Challenger Road                           (201) 296-4293
Overpeck Centre
Ridgefield Park, NJ  07660
Attention: Reorganization


          If you have any questions, call: ChaseMellon Shareholder
Services, L.L.C. at (888) 224-2745.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

                     SECTION 4 - DELIVERY INSTRUCTIONS

(Fill out ONLY if  delivery  is to be made to an  address  not shown on the
other side of this Certificate.)


Name:  
     -------------------------------------------------------------------------

Address: 
          --------------------------------------------------------------------


= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =



                                                                   Exhibit 4c

                      CLEAN DIESEL TECHNOLOGIES, INC.

                         INSTRUCTIONS AS TO USE OF
                            RIGHTS CERTIFICATES

                          -----------------------

           CONSULT THE INFORMATION AGENT, OR YOUR BANK OR BROKER,
         IF YOU HAVE ANY QUESTIONS AFTER READING THESE INSTRUCTIONS

                          -----------------------


     The  following   instructions  relate  to  the  rights  offering  (the
"Offering") by Clean Diesel Technologies, Inc., a Delaware corporation (the
"Company"),  to the holders ("Holders") of the Company's outstanding common
shares, par value $0.05 per share (the "Common Shares") as described in the
Company's Prospectus dated __________ __, 1998 (the "Prospectus").  Holders
of record (the "Record Date Holder") of the Company's  Common Shares at the
close of business on __________  __, 1998 (the "Record Date") are receiving
one transferable  subscription right (each a "Right") for each 50 shares of
the  Company's  Common Shares held on the Record Date;  provided,  however,
that Rights will not be  distributed  to Record Date  Holders who reside in
jurisdictions  where  the  Rights  have  not  been  registered  or where an
exemption from  registration  is not available,  as described more fully in
the  Prospectus.  Each Right  entitles  the  holder  thereof  (the  "Rights
Holder") to subscribe  for and  purchase  from the Company one share of the
Company's  Series B Convertible  Preferred Stock, par value $0.05 per share
(the "Series B Preferred  Stock") (the "Basic  Subscription  Privilege") at
the subscription price (the "Subscription  Price") of $____, and each share
of Series B Preferred Stock will be immediately convertible,  at no cost to
the holder thereof,  into 33 Common Shares. No fractional Rights or cash in
lieu  thereof  will be  distributed  or paid by the  Company.  An aggregate
number of up to 50,000 shares of Series B Preferred Stock (the  "Underlying
Shares") will be distributed in connection with the Offering.

     Subject to the proration and possible reduction  described below, each
Right also  entitles  any Record Date Holder  exercising  in full the Basic
Subscription  Privilege the right to subscribe for additional Common Shares
available after  satisfaction of all  subscriptions,  pursuant to the Basic
Subscription    Privilege   (the   "Oversubscription    Privilege").    The
Oversubscription  Privilege is not transferable.  Subject to the allocation
and possible reduction described below, Common Shares will be available for
purchase pursuant to the Oversubscription Privilege only to the extent that
any Underlying Shares are not subscribed for through the Basic Subscription
Privilege.  If the  Underlying  Shares are not  subscribed  for through the
Basic  Subscription  Privilege (the "Excess  Shares") are not sufficient to
satisfy all subscriptions pursuant to the Oversubscriptions  Privilege, the
Excess  Shares will be allocated pro rata  (subject to the  elimination  of
fractional   shares)  among  those  Record  Date  Holders   exercising  the
Oversubscription Privilege.

     The  Subscription  Price is payable in cash. See "THE RIGHTS OFFERING"
in the Prospectus.

     The Rights will expire at 5:00 p.m.  Eastern  time on  __________  __,
1998,  unless otherwise  extended by the Company in its sole discretion (in
either case, the "Expiration Date").

     The number of Rights to which you are  entitled is printed on the face
of your Rights Certificate.  You should indicate your wishes with regard to
the exercise, transfer or sale of your Rights by completing the appropriate
form or forms on the reverse side of your Rights  Certificate and returning
the Rights  Certificate to the Subscription Agent in the envelope provided.
Once  a  Rights  Holder  has  properly  exercised  the  Basic  Subscription
Privilege  or the  Oversubscription  Privilege,  such  exercise  may not be
revoked.

     YOUR  RIGHTS  CERTIFICATE  OR NOTICE OF  GUARANTEED  DELIVERY  MUST BE
RECEIVED BY THE SUBSCRIPTION  AGENT AND PAYMENT OF THE  SUBSCRIPTION  PRICE
INCLUDING FINAL CLEARANCE OF ANY UNCERTIFIED CHECKS MUST BE RECEIVED BY THE
SUBSCRIPTION  AGENT, AT OR BEFORE 5:00 P.M.  EASTERN TIME ON __________ __,
1998. YOU MAY NOT REVOKE ANY EXERCISE OF A RIGHT.

     1. Subscription Privileges.

     To Exercise Rights.  To exercise your Rights,  complete Form 1 of your
Rights  Certificate  and  send  to the  Subscription  Agent  your  properly
completed and executed Rights Certificate  together with payment in full of
the Subscription Price for each Underlying Share subscribed for pursuant to
the  Basic  Subscription  Privilege  and  the  Oversubscription  Privilege.
Payment  of the  Subscription  Price  must be made for the full  number  of
Underlying  Shares  being  subscribed  for (a) by check or bank  draft,  or
postal, telegraphic or express money order, in each case, payable to Mellon
Securities Trust Company, as Subscription Agent, or (b) by wire transfer of
funds to the account  maintained by the Subscription Agent for such purpose
of accepting subscriptions at The Chase Manhattan Bank, New York, New York,
ABA  #021000021,   Account  #323-213057,  FBO  Clean  Diesel  Technologies,
Attention:  ChaseMellon Shareholder Services, L.L.C., Evelyn O'Connor (with
Subscriber's  name),  the  Subscription  Price  will be deemed to have been
received by the Agent only upon (i)  clearance  of any  uncertified  check,
(ii) receipt by the Subscription  Agent of any certified check or cashier's
check,  or of any  postal,  telegraphic  or  express  money  order or (iii)
receipt of collected funds in the Subscription  Agent's account  designated
above.  IF PAYING BY  UNCERTIFIED  CHECK,  PLEASE  NOTE THAT THE FUNDS PAID
THEREBY  MAY TAKE AT LEAST FIVE (5)  BUSINESS  DAYS TO CLEAR.  ACCORDINGLY,
RIGHTS  HOLDERS  WHO  WISH  TO PAY  THE  SUBSCRIPTION  PRICE  BY  MEANS  OF
UNCERTIFIED CHECK ARE URGED TO MAKE PAYMENT  SUFFICIENTLY IN ADVANCE OF THE
EXPIRATION  DATE TO ENSURE THAT SUCH PAYMENT IS RECEIVED AND CLEARS  BEFORE
THE EXPIRATION DATE AND ARE URGED TO CONSIDER IN THE  ALTERNATIVE,  PAYMENT
BY MEANS OF CERTIFIED  CHECK,  BANK DRAFT,  MONEY ORDER OR WIRE TRANSFER OF
FUNDS.

     If you exercise  less than all of the Rights  evidenced by your Rights
Certificate  by so  indicating  on Form 1 of your Rights  Certificate,  the
Subscription  Agent will  either (i) issue to you a new Rights  Certificate
representing  the remaining  rights or (ii) if you so indicate on Form 2 of
your Rights  Certificate,  issue a new Rights  Certificate  to a designated
transferee.  If no indication is made, the Subscription Agent will issue to
you a new Rights  Certificate  evidencing the  unexercised  Rights.  If you
choose,  however,  to  have  a new  Rights  Certificate  sent  to  you or a
designated transferee,  such new Subscription Rights Certificate may not be
received in sufficient  time to permit you or the designated  transferee to
sell or exercise the Rights evidenced thereby.

     If you have not indicated the number of Rights being exercised,  or if
you have not  forwarded  full  payment  of the  Subscription  Price for the
number of Rights that you have indicated are being exercised, then you will
be deemed to have exercised the Basic  Subscription  Privilege with respect
to the maximum  number of Rights which may be exercised  for the  aggregate
payment  delivered  by you and,  to the extent that the  aggregate  payment
delivered by you exceeds the product of the  Subscription  Price multiplied
by the number of Rights which may be exercised  for the  aggregate  payment
delivered by you and, to the extent that the aggregate payment delivered by
you exceeds the product of the Subscription  Price multiplied by the number
of Rights  evidenced  by the Rights  Certificate(s)  delivered by you (such
excess  being  the  "Subscription  Excess"),  you  will be  deemed  to have
exercised  the  Oversubscription  Privilege  to  purchase,  to  the  extent
available,  that  number  of whole,  Excess  Shares  equal to the  quotient
obtained by dividing the Subscription  Excess by the Subscription Price and
any amount remaining after such division shall be returned to you.

     To Exercise  Rights through a Nominee.  If you wish to have your bank,
broker  or other  nominee  exercise  some or all of your  Rights,  you must
complete  Forms  1, 2 and 3 of your  Rights  Certificate,  providing  clear
direction as to how many Rights are to be exercised  and what action should
be taken in regards to any  unexercised  Rights.  Banks,  brokers and other
nominees  who  exercise  the  Oversubscription  Privilege  on behalf of the
beneficial owners of Rights will be required to certify to the Subscription
Agent and the Company,  by delivery to the Subscription  Agent of a Nominee
Holder  Oversubscription  Certification  in the  form  available  from  the
Subscription Agent or the Information Agent, the aggregate number of Rights
as to which the  Oversubscription  Privilege  are being  exercised  and the
number of Underlying Shares thereby subscribed for by each beneficial owner
of Rights on whose behalf such nominee holder is acting.

     To Exercise Rights if Rights  Certificate Might Not Properly Reach the
Subscription  Agent Prior to the  Expiration  Date. You may cause a written
guarantee substantially in the form of Exhibit A to these instructions (the
"Notice  of  Guaranteed  Delivery")  from  a  member  firm  of an  approved
Signature  Guarantee Medallion Program (an "Eligible  Institution"),  to be
received by the  Subscription  Agent at or prior to the Expiration  Date or
complete  the  information  provided  in Form 1 of the Rights  Certificate;
payment in full of the applicable Subscription Price may be made separately
as long as said payment is also  received by the  Subscription  Agent at or
prior to the Expiration Date. Such Notice of Guaranteed Delivery must state
your name, the number of Rights  represented by your Rights Certificate and
the number of Underlying  Shares being subscribed for pursuant to the Basic
Subscription  Privilege and being  subscribed for, if any,  pursuant to the
Oversubscription Privilege, and the Eligible Institution must guarantee the
delivery to the Subscription  Agent of your properly completed and executed
Rights Certificate(s) evidencing those Rights within five (5) Trading Days,
following the date of the Notice of Guaranteed Delivery.  If this procedure
is  followed,   your  Rights   Certificate(s)   must  be  received  by  the
Subscription  Agent within five (5) Trading Days  following the date of the
Notice of Guaranteed  Delivery relating  thereto.  Additional copies of the
Notice  of  Guaranteed  Delivery  may be  obtained  upon  request  from the
Information Agent.

     2. The Subscription Agent and the Information Agent

     The address and  telephone  number of the  Subscription  Agent and the
Information Agent are as follows:


         In the U.S.:                                In the U.K.:
 Chemical Mellon Shareholder                 Computershare Services, P.L.C.
           Services                                  P. O. Box 859
  450 West 33rd Street, 15th                         Consort House
            Floor                                     East Street
   New York, New York 10001                       Bedminister, Bristol
        (800) 814-0304                                  BZ991XZ
                                                     1179-370-672

     3. Issuance and Delivery of Stock Certificates, Etc.

     The following  issuances,  deliveries and payments will be made to you
at the  address  shown on the face of your  Rights  Certificate  unless you
provide special payment,  issuance or delivery instructions to the contrary
by completing the applicable part of Form 3 of your Rights Certificate.

     Series B Preferred Stock Certificates.  Subject to satisfaction of the
minimum conditions required,  the Subscription Agent will issue and mail in
accordance  with  the  instruction  of  the  exercising  Rights  Holder,  a
certificate  representing Underlying Shares purchased pursuant to the valid
exercise of Rights,  as soon as practicable  after the Expiration  Date and
all  prorations  and  reductions  contemplated  by the  Offering  have been
effected.  See "THE  RIGHTS  OFFERING  -  Subscription  Privileges"  in the
Prospectus.

     Refunding  of  Excess  Payments.  As soon  as  practicable  after  the
Expiration   Date  and  after  all  prorations   and  possible   reductions
contemplated  by  the  terms  of  the  Offering  have  been  effected,  the
Subscription  Agent will return by mail  without  interest or  deduction to
each Rights Holder  exercising  the  Oversubscription  Privilege any excess
funds received in payment of the Subscription  Price for Underlying  Shares
that were  subscribed  for by such Rights  Holder but not allocated to such
Rights Holder pursuant to the Oversubscription Privilege.

     4. To Sell or Transfer Rights.

     Sale of Rights  through a Bank,  Broker or Other  Nominee.  To sell or
transfer all Rights  evidenced by a Rights  Certificate  through your bank,
broker  or other  nominee,  so  indicate  on  Forms 2 and 4 of your  Rights
Certificate  and  deliver  your  properly  completed  and  executed  Rights
Certificate  to your bank or  broker.  Your  Rights  Certificate  should be
delivered  to your bank or broker in  sufficient  time for the Rights to be
sold. If Form 2 of your Rights Certificate is completed without designating
a transferee, the Subscription Agent may thereafter treat the bearer of the
Rights  Certificate as the absolute owner of all of the Rights evidenced by
such Rights  Certificate for all purposes,  and the Subscription Agent will
not be affected by any notice to the contrary.  Because your bank or broker
cannot issue Rights Certificates,  if you wish to sell less than all of the
Rights evidenced by a Rights  Certificate,  either your bank or broker must
instruct the  Subscription  Agent as to the action to be taken with respect
to the Rights  that are not to be sold,  or your bank or broker  must first
have your Rights Certificate  divided into Rights  Certificates  evidencing
the appropriate  numbers of Rights by following the instructions in Section
5 below.

     Transfer of Rights to a Designated Transferee. To sell or transfer all
of your  Rights  to a  transferee  other  than a bank or  broker,  you must
complete Form 2 of your Rights  Certificate  in its  entirety,  execute the
Rights  Certificate and have your signature  guaranteed by a bank,  broker,
dealer,   municipal   securities  dealer,   municipal   securities  broker,
government  securities dealer,  government securities broker, credit union,
national  securities  exchange,   registered  securities  association,   or
clearing  agency  or  savings   association  under  an  approved  Signature
Guarantee Medallion Program (an "Eligible Guarantor Institution"). A Rights
Certificate  that has been  properly  transferred  in its  entirety  may be
exercised by a new Rights Holder  without  having a new Rights  Certificate
issued.  To  exercise,  or  otherwise  take action with  respect to, such a
transferred  Rights  Certificate,  the new Rights Holder should deliver the
Rights  Certificate,  together with payment of the applicable  Subscription
Price and complete separate instructions signed by the new Rights Holder to
the Subscription  Agent in sufficient time to permit the Subscription Agent
to take the desired  action.  The new Rights  Holder may not  exercise  the
Oversubscription  Privilege.  The new  Rights  Holder may be subject to the
prorations and possible  reductions  described in Section 1 above. Only the
Subscription Agent can issue Rights Certificates. However, you may transfer
a portion of the Rights  evidenced by a single Rights  Certificate (but not
fractional  Rights)  by  delivering  to the  Subscription  Agent  a  Rights
Certificate  properly endorsed for transfer,  with instructions to register
that portion of the Rights indicated  therein in the name of the transferee
and to issue a new Rights  Certificate  to the  transferee  evidencing  the
transferred Rights. In that event, a new Rights Certificate  evidencing the
balance of the Rights will be issued to you or, if you so  instruct,  to an
additional   transferee.   Alternatively,   you  may  divide   your  Rights
Certificate  into Rights  Certificates  evidencing  appropriate  numbers of
Rights for transfer by following the instructions in Section 5 below.

     If you wish to  transfer  all or a  portion  of your  Rights  (but not
fractional  Rights),  you should allow a sufficient amount of time prior to
the Expiration  Date for (i) the transfer  instructions  to be received and
processed by the  Subscription  Agent,  (ii) new Rights  Certificates to be
issued and  transmitted to the  transferor(s),  with respect to transferred
Rights,  and to you with respect to retained Rights,  if any, and (iii) the
Rights evidenced by the new Rights  Certificates to be exercised or sold by
the  recipients  thereof.  Such amount of time could range from four to six
business  days,  depending  upon the method by which delivery of the Rights
Certificates  and payment is made and the number of transactions  which you
instruct  the  Subscription  Agent to effect.  Neither  the company nor the
Subscription Agent will have any liability to a transferee or transferor of
Rights if Rights Certificates are not received in time for exercise or sale
prior to the Expiration Date.

     THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION,  THE SERIES B PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:  ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

     5. To Divide a Rights Certificate.

     To have  your  Rights  Certificate  divided  into  two or more  Rights
Certificates,  evidencing  the same aggregate  number of rights,  send your
Rights Certificate, together with complete separate instructions (including
specification  of the  denominations  into which you wish your Rights to be
divided) signed by you, to the  Subscription  Agent,  allowing a sufficient
amount of time for new Rights  Certificates  to be issued and  returned  so
they can be used prior to the Expiration Date. Alternatively, you may ask a
bank or broker to effect such actions on your behalf.  Your  signature must
be guaranteed by an Eligible  Guarantor  Institution (as defined in Section
4) if any of the new Rights  Certificates  are to be issued in a name other
than that in which the  original  Rights  Certificate  was  issued.  Rights
Certificates may not be divided into fractional Rights, and any instruction
to do so will be rejected.  As a result of delays in the mail,  the time of
the transmittal,  the necessary  processing time and other factors,  you or
your  transferee  may not receive such new Rights  Certificates  in time to
enable the Rights  Holder to complete a sale or exercise by the  Expiration
Date.  Neither  the Company  nor the  Subscription  Agent will be liable to
either a transferor or transferee for any such delays.

     6. Signatures.

     Execution by Rights  Holder.  The signature on the Rights  Certificate
must correspond with the name of the Rights Holder exactly as it appears on
the  face of the  Rights  Certificate  without  any  alteration  or  change
whatsoever.  Persons who sign the Rights Certificate in a representative or
other  fiduciary  capacity must indicate  their  capacity when signing and,
unless  waived by the  Company in its sole and  absolute  discretion,  must
present to the Subscription Agent satisfactory  evidence of their authority
to so act.

     Execution  by  Person  Other  than  Rights   Holder.   If  the  Rights
Certificate  is executed by a person other than the Rights  Holder named on
the face of the Rights  Certificate,  proper  evidence of  authority of the
person executing the Rights Certificate must accompany the same unless, for
good cause, the Company dispenses with proof of authority.

     Signature Guarantees. Unless your Rights Certificate (i) provides that
the Underlying  Shares to be issued  pursuant to the exercise of the Rights
represented  thereby are to be issued to you or (ii) is  submitted  for the
account  of an  Eligible  Institution  (as  defined  in  Section  1),  your
signature  on each Rights  Certificate  must be  guaranteed  by an Eligible
Guarantor Institution (as defined in Section 4).

     7. Method of Delivery.

     The  method of  delivery  of Rights  Certificates  and  payment of the
Subscription  Price to the Subscription  Agent will be at your election and
risk,  but,  if sent by mail,  you are  urged  to send  such  materials  by
registered mail, properly insured,  with return receipt requested,  and are
urged  to allow a  sufficient  number  of days to  ensure  delivery  to the
Subscription  Agent  and,  if you are  paying  by  uncertified  check,  the
clearance  of payment of the  Subscription  Price  prior to the  Expiration
Date.  Because  uncertified checks may take at least five (5) business days
to clear,  you are strongly urged to consider payment by means of certified
check, cashier's check, money order or wire transfer.

     8. Lost, Stolen, Destroyed or Mutilated Rights Certificates.

     Upon  receipt by the  Company and the  Subscription  Agent of evidence
reasonably  satisfactory  to  them  of  the  loss,  theft,  destruction  or
mutilation  of a  Rights  Certificate,  and,  in case  of  loss,  theft  or
destruction,  of indemnity  and/or security  satisfactory to them, in their
sole  discretion,  and  reimbursement  to the Company and the  Subscription
Agent of all reasonable expenses incidental thereto, and upon surrender and
cancellation  of the Rights  Certificate,  if mutilated,  the  Subscription
Agent will make and deliver a new Rights  Certificate  of like tenor to the
registered Rights Holder in lieu of the Rights Certificate so lost, stolen,
destroyed  or  mutilated.  If required  by the Company or the  Subscription
Agent,  an indemnity  bond must be sufficient in the judgment of each party
to protect the Company,  the  Subscription  Agent or any agent thereof from
any loss  which any of them may  suffer  if a lost,  stolen,  destroyed  or
mutilated Rights Certificate is replaced. See Exhibit B hereto.

     9. Special  Provisions  Relating to The Delivery of Rights through The
Depository Trust Company.

     In the case of Rights that are held of record  through The  Depository
Trust Company ("DTC"),  exercises of the Basic Subscription  Privilege (but
not the  Oversubscription  Privilege) may be effected by instructing DTC to
transfer  Rights (such Rights being "DTC  Rights")  from the DTC account of
the Rights Holder to the DTC account of the  Subscription  Agent,  together
with payment of the Subscription Price for each Underlying Share subscribed
for  pursuant to the Basic  Subscription  Privilege.  The  Oversubscription
Privilege  in respect of DTC Rights may not be  exercised  through DTC. The
holder of DTC Rights may exercise the Oversubscription Privilege in respect
thereof by properly executing and delivering to the Subscription  Agent, at
or  prior  to  the  Expiration  Date,  a DTC  Participant  Oversubscription
Exercise  Form, in the form  available  from the  Information  Agent or the
Subscription Agent,  together with payment of the appropriate  Subscription
Price  for the  number  of Excess  Shares  for  which the  Oversubscription
Privilege is exercised.

     If a Notice of Guaranteed  Delivery  relates to Rights with respect to
which exercise of the Basic Subscription Privilege will be made through DTC
and such Notice of Guaranteed  Delivery also relates to the exercise of the
Oversubscription  Privilege,  a DTC Participant  Oversubscription  Exercise
Form must also be  received  by the  Subscription  Agent in respect of such
exercise of the  Oversubscription  Privilege at or prior to the  Expiration
Date.

     10. Transfer Taxes.

     Except for  certain  fees paid to  broker-dealers  and  charged by the
Subscription Agent that will be paid by the Company, all commissions,  fees
and other expenses  (including  brokerage  commissions  and transfer taxes)
incurred in connection  with the purchase,  sale or exercise of Rights will
be for the account of the  transferring  Holder of the Rights,  and none of
such  commissions,  fees or  expenses  will be paid by the  Company  or the
Subscription Agent.

     11. Irregularities.

     All questions concerning the timelines, validity, form and eligibility
of any  exercise  of  Rights  will  be  determined  by the  Company,  whose
determinations  will  be  final  and  binding.  The  Company  in  its  sole
discretion,  may waive any  defect or  irregularity,  or permit a defect or
irregularity  to be  corrected  within  such time as it may  determine,  or
reject the purported exercise of any Right. Rights Certificates will not be
deemed to have been received or accepted until all irregularities have been
waived or cured  within  such time as the Company  determines,  in its sole
discretion.  Neither the Company,  nor the Subscription Agent will be under
any duty to give  notification  of any defect or irregularity in connection
with the  submission  of Rights  Certificates  or incur any  liability  for
failure to give such notification. The Company reserves the right to reject
any exercise if such  exercise is not in  accordance  with the terms of the
Offering or not in proper form or if the acceptance thereof or the issuance
of the shares of Series B Preferred Stock pursuant  thereto could be deemed
unlawful.



                                                                  EXHIBIT
                                                                  TO
                                                                  INSTRUCTIONS

                         IMPORTANT TAX INFORMATION

     Under the U.S. Federal income tax law, (1) dividend  payments that may
be made by the Company on shares of Common  Stock  issued upon the exercise
of Rights,  and (2) payments that may be remitted by the Subscription Agent
to Rights Holders in respect of Rights sold on such Rights  Holders' behalf
by the Subscription Agent, may be subject to backup  withholding,  and each
Rights  Holder who either  exercises  Rights or requests  the  Subscription
Agent  to  sell  Rights  should  provide  the  Subscription  Agent  (as the
Company's agent, in respect of exercised Rights, and as payer in respect of
Rights sold by the  Subscription  Agent) with such Rights Holders'  correct
taxpayer   identification   number  on  the  Substitute  Form  W-9  in  the
Subscription Right Certificate. If such Rights Holder is an individual, the
taxpayer identification number is his or her social security number. If the
Subscription Agent is not provided with the correct taxpayer identification
number in connection  with such payments,  the Rights Holder may be subject
to a $50 penalty imposed by the Internal Revenue Service.

     Exempt Rights Holders  (including,  among others, all corporations and
certain foreign  individuals)  are not subject to these backup  withholding
and  information  reporting   requirements.   In  general,  for  a  foreign
individual to qualify as an exempt recipient, the Rights Holder must submit
a  statement,  signed  under the  penalties  of perjury,  attesting to that
individual's  exempt  status.  Such  statements  can be  obtained  from the
Subscription  Agent.  See the  enclosed  Guidelines  for  Certification  of
Taxpayer  Identification  Number  on  Substitute  Form  W-9 for  additional
instructions.

     If backup withholding  applies, the Company or the Subscription Agent,
as the case may be, will be required to withhold  31% of any such  payments
made to the Rights Holder.  Backup  withholding  is not an additional  tax.
Rather,  the tax liability of persons subject to backup withholding will be
reduced  by the  amount  of tax  withheld.  If  withholding  results  in an
overpayment of taxes, a refund may be obtained.

Purpose of Substitute Form W-9

     To prevent backup withholding, the Rights Holder is required to notify
the Subscription Agent of his or her correct taxpayer identification number
by  completing  the  Substitute   Form  W-9  included  as  a  part  of  the
Subscription Right Certificate certifying that the taxpayer  identification
number  provided  on  Substitute  Form W-9 is correct  (or that such Rights
Holder is awaiting a taxpayer identification number).

What Number to Give the Subscription Agent

     The Rights Holder is required to furnish the  Subscription  Agent such
Rights Holder's social security number or employer  identification  number.
If the  Rights  are in more  than  one  name or are not in the  name of the
actual owner, consult the enclosed Guidelines for Certification of Taxpayer
Identification  Number on Substitute  Form W-9 for  additional  guidance on
which number to report.


                                                                  EXHIBIT A
                                                                  TO
                                                                  INSTRUCTIONS

    NOTICE OF GUARANTEED DELIVERY FOR SHARES OF SERIES B PREFERRED STOCK
               OF CLEAN DIESEL TECHNOLOGIES, INC. SUBSCRIBED
                    FOR UNDER BASIC SUBSCRIPTION AND THE
                        OVER-SUBSCRIPTION PRIVILEGE

     As set forth in the Prospectus  under "THE RIGHTS OFFERING  --Exercise
of Rights", this form or one substantially equivalent hereto may be used as
a means  of  effecting  subscription  and  payment  for all  shares  of the
Company's   Series  A  Preferred  Stock  subscribed  for  under  the  Basic
Subscription  and  the  Over-Subscription   Privilege.  Such  form  may  be
delivered by hand or sent by facsimile  transmission,  overnight courier or
mail to the Subscription Agent.

                         The Subscription Agent is:

                      CHASEMELLON SHAREHOLDER SERVICES


By Mail:                    By Hand:                      By Express Mail
   ChaseMellon Shareholder     ChaseMellon                or Overnight Courier:
   Services                    Shareholder Services,          ChaseMellon
   Post Office Box 3301        L.L.C.                     Shareholder Services,
   South Hackensack, NJ 07606  120 Broadway               85 Challenger Road,
                               13th Floor                 Overpeck Centre,
                               New York, NY  10271    Ridgefield Park, NJ 07660
By Facsimile:                                             Attn: Reorg. Dept.
   ChaseMellon
   Shareholder Services
   (201) 296-4293

       DELIVERY OF THIS INSTRUMENT TO AN ADDRESS, OR TRANSMISSION OF
 INSTRUCTIONS VIA A TELECOPY OR FACSIMILE NUMBER, OTHER THAN AS SET FORTH
                ABOVE, DOES NOT CONSTITUTE A VALID DELIVERY

The New York Stock  Exchange  member  firm or bank or trust  company  which
completes this form must communicate the guarantee and the number of Shares
subscribed for (under both the Basic Subscription and the Over-Subscription
Privilege)  to the  Subscription  Agent  and must  deliver  this  Notice of
Guaranteed  Delivery  of Payment,  guaranteeing  delivery of (i) payment in
full for all  Subscribed  Shares and (ii) a properly  completed  and signed
copy of the Rights  Certificate,  to the  Subscription  Agent prior to 5:00
p.m.  New York City time,  on the  Expiration  Date.  Failure to do so will
result in a forfeiture of the rights.


                                 GUARANTEE

     The  undersigned,  a member  firm of the New York Stock  Exchange or a
bank or trust company, (i) guarantees delivery to the Subscription Agent by
3 trading  days after the  expiration  or all  extensions  thereof of (A) a
properly completed and executed Rights Certificate,  and (B) payment of the
full Subscription Price for Shares subscribed for on Basic Subscription and
pursuant  to the  Over-Subscription  Privilege,  as  subscription  for such
Shares as indicated herein or in the Rights Certificate.

- ---------------------------------------   -------------------------------------
NUMBER OF SHARES ON BASIC SUBSCRIPTION    NUMBER OF SHARES ON OVER-SUBSCRIPTION
                                          PRIVILEGE


- --------------------------------------    -------------------------------------
Name of Firm                              Authorized Signature


- --------------------------------------    -------------------------------------
Address                                   Title


                                          Name:
- --------------------------------------         --------------------------------
Zip Code                                        (Please Type or Print)


- --------------------------------------    -------------------------------------
Telephone Number                          Date


                                                               EXHIBIT B
                                                               TO
                                                               INSTRUCTIONS

             AFFIDAVIT OF LOST, STOLEN, DESTROYED OR MUTILATED
                            RIGHT CERTIFICATE(S)

CERTIFICATE    NO(s)    _______________________    (if    available)    for
_____________________  Rights to purchase Series B Preferred Stock of Clean
Diesel Technologies, Inc.

I  am  the  lawful  owner  of  the   above-described   representing  Rights
Certificate(s)   to  purchase  shares  of  Common  Stock  of  Clean  Diesel
Technologies,  Inc. (the "Company") at an exercise price of $___ per share.
The Rights Certificate(s) has (have) not been exercised,  endorsed, cashed,
negotiated,  transferred,  assigned or otherwise disposed of. I have made a
diligent search for the Rights  Certificate(s) and have been unable to find
it (them) and make this  affidavit  for the purpose of inducing the Company
and ChaseMellon  Shareholder  Services to issue a new Rights Certificate of
like tenor,  and hereby agree to surrender  the Rights  Certificate(s)  for
cancellation  should I, at any time,  find the  Rights  Certificate(s).  In
consideration  of the  receipt of a new Rights  Certificate(s),  I agree to
completely indemnify, protect and hold harmless the Company and ChaseMellon
Shareholder   Services  and  any  other  party  to  the  transaction   (the
"Obligees") from and against all loss,  costs and damages,  including court
costs and  attorneys'  fees,  which they may be subject to or liable for in
respect of the cancellation of Rights Certificate(s).  The rights according
to the Obligees  under the preceding  sentence  shall not be limited by the
negligence,  inadvertance,  accident,  oversight  or  breach of any duty or
obligation  on the  part of the  Obligees  or  their  respective  officers,
employees and agents or their failure to inquire into,  contest or litigate
any claim,  whenever such negligence,  inadvertence,  accident,  oversight,
breach or failure may occur or have occurred.

                                     PLEASE DATE AND SIGN BELOW:


                                     Dated:
                                            ----------------, 1988
                                    
                                     --------------------------------------
                                          (Signature of Holder)


                                     --------------------------------------
                                          (Signature of Holder)

(Must be signed above by registered holder(s) or by person(s) authorized to
receive the cash payments)


                                                                    Exhibit 4f


                [CLEAN DIESEL TECHNOLOGIES, INC. LETTERHEAD]

Dear Shareholder:

You will find enclosed the Preliminary  Prospectus (the  "Prospectus")  and
other materials  relating to the rights offering (the "Rights Offering") by
Clean  Diesel  Technologies,  Inc.  ("CDT").  Please  carefully  review the
enclosed  Prospectus,  including the sections titled "The Rights Offering,"
which describes how you may participate in the Rights Offering, "Business,"
which more fully describes the Company's business, "Management's Discussion
and Analysis of Financial  Condition and Results of Operations," which more
fully describes the Company's financial position, and "Risk Factors," which
describes  certain risks associated with an investment in securities of the
Company, as well as the same sections in the final Prospectus which will be
mailed  after the  Registration  Statement  relating to the  prospectus  is
declared effective by the Securities and Exchange  Commission.  Capitalized
terms used but not described herein have the respective  meanings set forth
in the Prospectus.

The  following is a brief  review of our products and markets,  and current
financial situation.

When we formed CDT, we had patents for  Platinum  Fuel  Catalysts  ("PFCs")
licensed from Fuel Tech and limited testing results of PFCs. We now have 12
US  and 38  International  patents  on  PFCs  and  nitrogen  oxide  ("NOx")
reduction  systems and have  another 83 US and  International  applications
pending.  In addition,  the Company has completed  successful  testing of a
diesel  fuel  PFC  additive,  launched  the  marketing  of a  PFC  used  to
rejuvenate aged catalytic  converters in Europe, and developed the Advanced
Reagent  Injection  System  ("ARIS(TM)  2000")  for  use in  catalytic  NOx
reduction systems.

The  Company  has  successfully   completed  a  study  at  Delft  Technical
University in the  Netherlands  to determine the  fundamental  mechanism of
metallic additives. In particular, we investigated the function of platinum
as part of a composite additive with other catalysts.  Results of the study
show that a system of a bimetallic  additive of platinum and cerium (Pt/Ce)
with a ceramic filter:

     *    gives performance superior to any system known,

     *    gives a significantly lower oxidation temperature for soot, and

     *    uses  much  lower  metal  levels  in the fuel  than  other  known
          additive filter systems.

The  Delft  paper  has  provoked  excellent  market  response  from  engine
companies and catalyst system companies. The results reported by Delft were
confirmed  in  demonstrations  at  Cummins  Engine  Company  by a  test  in
Switzerland.

While the foregoing  results refer to a system  incorporating  filters,  we
have demonstrated  that the Pt/Ce additive also gives significant  emission
reductions on engines without particulate  filters or oxidizers.  Moreover,
the  emission   benefits  are  usually   accompanied   by  a  fuel  economy
improvement.

We now have to complete  registration  of the combined  Pt/Ce additive with
the EPA in order to be able to sell the  combined  additive for on-road use
in the U.S. We expect to complete the registration by October of 1998.

In the US, we believe there is a near term market  developing for additives
for diesel fuel which will reduce smoke, gaseous and particulate  emissions
from the current  fleet of  engines.  The market is a result of pending EPA
retrofit  guidelines which provide for State  Implementation  Plans ("SIP")
credits,  as well as state programs for  enforcement  of smoke  regulation,
which include  random  highway smoke tests with  substantial  penalties for
failure.

We believe  that another  market for Pt/Ce is in Taiwan,  where a bus fleet
trial confirmed the performance of the Pt/Ce filter system.

We believe  that a medium  term  market for Pt/Ce is with  filters  for new
vehicles,  especially light duty vehicles.  Peugeot has announced they will
introduce filters in 2000.

Using the Pt/Ce  additives in vehicles with filters  presents a potentially
very large market. This is driven by increasing concern about fine particle
emissions;  whereas new engines  produce little smoke,  the total number of
particles has increased.  Management  believes that filters are seen as the
preferred  remedy capable of removing more than 90% of the particles.  This
focus is given further weight by the probable  classification by California
of diesel  emissions as toxic.  The toxicity is most  associated  with soot
particles.  Once  collected  on the  filter,  the soot must be  oxidized to
prevent the filter from clogging, and that is where the additive is needed.

Our second product is a gasoline  additive which rejuvenates aged catalytic
converters.  This work was jointly funded by Holt Lloyd  International Ltd.
("Holts"),  which  launched  the product in the UK in 1997 in the  consumer
aftermarket  through auto parts  stores.  The results  were  disappointing.
Holts concluded that consumers did not understand what the product does and
the  majority  did not know if their cars had  catalytic  converters.  Test
marketing  by Holts  concluded  that the  product  should  be sold  through
service and repair shops. Holts is considering how to better reposition the
product.

In the US, we have  interest from  marketing  companies to package and sell
the gasoline  product.  We are seeking a marketing partner who will fund or
jointly fund the necessary  registration and  demonstration of this product
in the US. The  product may be launched in the US during the second half of
1999, although no assurances can be given in this regard.

Our third  product is for NOx  reduction.  We have  developed,  built,  and
tested a  prototype  system  called the  ARIS(TM)  2000  (Advanced  Reagent
Injection System).  The ARIS system injects urea over a catalyst to achieve
NOx reduction of up to 90%. The catalysts are similar to catalysts  used in
gas turbines and boilers and are made by catalyst manufacturers. We plan to
commercialize this system through cooperative ventures and licenses.

Current  regulation  in  California  and the  Northeast  states  for  large
stationary  diesel  engines sets NOx levels at a 50% to 90% reduction  from
normal levels  achieved  from current  production  engines under  federally
mandated Best Available Control  Technology  ("BACT") and Lowest Achievable
Emission Rate ("LAER")  requirements in ozone  non-attainment  areas.  Cost
effective systems are not yet available. As a result, gas engines are being
installed,  which cost more to buy and to run than the ARIS(TM)  2000.  The
Company intends to sell the ARIS(TM) 2000 to total system suppliers, engine
companies,  engine  distributors  or the  assemblers  of  generation  sets,
compressors, pumps, etc.

In summary, we started with a  partially-developed  diesel additive with no
defined market and a concept for a NOx reduction system.

     *    We now have  developed a diesel PFC  additive  which is effective
          both  for  emission  reduction  from  engines  and  significantly
          improves the performance of filters.

     *    We have launched the  marketing of a PFC used to rejuvenate  aged
          catalytic converters in Europe.

     *    We have  developed  the ARIS(TM)  2000 for use in  catalytic  NOx
          reduction systems.

Through the net  proceeds  of the Rights  Offering,  together  with the net
proceeds from the recent bridge  financing,  CDT seeks to commercialize the
foregoing products.

If you have any questions concerning the Rights Offering,  please feel free
to  telephone  the  Information  Agent at ( )          . On  behalf  of the
Board of Directors, we thank you for your support and confidence  and  look
forward to continuing to serve you.

                                          Sincerely,


                                          Jeremy D. Peter-Hoblyn
                                          President and Chief Executive
                                          Officer, Director

THIS  LETTER  CONTAINS  FORWARD-LOOKING  STATEMENTS  WITHIN THE  MEANING OF
SECTION   27A  OF  THE   SECURITIES   ACT.   DISCUSSION   CONTAINING   SUCH
FORWARD-LOOKING  STATEMENTS  WILL BE FOUND IN THE  MATERIAL SET FORTH UNDER
"PROSPECTUS  SUMMARY,  "RISK  FACTORS,"  "USE OF  PROCEEDS,"  "MANAGEMENT'S
DISCUSSION  AND ANALYSIS OF FINANCIAL  CONDITION AND RESULTS OF OPERATIONS"
AND "BUSINESS," AS WELL AS WITHIN THE PROSPECTUS GENERALLY.  ACTUAL RESULTS
COULD  DIFFER  MATERIALLY  FROM  THOSE  PROJECTED  IN  THE  FORWARD-LOOKING
STATEMENTS  AS A RESULT OF THE RISK FACTORS SET FORTH UNDER "RISK  FACTORS"
AND THE MATTERS SET FORTH IN THIS PROSPECTUS GENERALLY.

A REGISTRATION  STATEMENT  RELATING TO THESE SECURITIES HAS BEEN FILED WITH
THE  SECURITIES AND EXCHANGE  COMMISSION BUT HAS NOT YET BECOME  EFFECTIVE.
THE  SECURITIES  MAY NOT BE SOLD NOR MAY OFFERS TO BUY BE ACCEPTED PRIOR TO
THE TIME THE REGISTRATION  STATEMENT BECOMES  EFFECTIVE.  THIS LETTER SHALL
NOT CONSTITUTE AN OFFER TO SELL OR THE  SOLICITATION OF AN OFFER TO BUY NOR
SHALL THERE BE ANY SALE OF THE SECURITIES IN ANY JURISDICTION IN WHICH SUCH
OFFER,  SOLICITATION  OR SALE WOULD BE UNLAWFUL  PRIOR TO  REGISTRATION  OR
QUALIFICATION UNDER THE SECURITIES LAWS OF ANY JURISDICTION.

THE USE OF THIS LETTER IS AUTHORIZED ONLY WHEN PRECEDED OR ACCOMPANIED BY A
PROSPECTUS.

                                                                    Exhibit 4g

           50,000 Shares of Series B Convertible Preferred Stock

                      CLEAN DIESEL TECHNOLOGIES, INC.

      Series B Convertible Preferred Stock (par value $0.05 per share)

                    Initially Offered Pursuant to Rights
                        Distributed to Shareholders



To Securities Dealers, Commercial Banks,
  Brokers, Trust Companies and Other Nominees:

     Enclosed  are  a  Prospectus,   dated   ___________  ____,  1998  (the
"Prospectus"),  and  Instructions  as to Use of  Rights  Certificates  (the
"Instructions"),  relating to the offering of up to 50,000 shares of Series
B  Convertible  Preferred  Stock,  par value $0.05 per share (the "Series B
Preferred Stock"), of Clean Diesel Technologies,  Inc. (the "Company), at a
subscription price of $_______ per share in cash,  pursuant to transferable
subscription rights ("Rights")  initially  distributed to holders of record
("Record Date Holders") of the Company's  outstanding  common  shares,  par
value $0.05 per share (the "Common  Shares") as of the close of business on
_______ __, 1998 (the "Record Date");  provided,  however, that Rights will
not be  distributed to and may not be exercised by, Record Date Holders who
reside in jurisdictions  where the Rights have not been registered or where
an exemption from registration is not available, as described more fully in
the Prospectus. The Rights are described in the Prospectus and evidenced by
a Rights  Certificate (a "Rights  Certificate")  registered in your name or
the name of your nominee.

     Each  beneficial  owner of the Company's  Common Shares  registered in
your name or the name of your  nominee is entitled to one Right for each 50
Common Shares so owned by such beneficial owner on the Record Date and each
share of Series B Preferred  Stock will be immediately  convertible,  at no
cost to the holder thereof,  into 33 Common Shares. No fractional Rights or
cash in lieu thereof will be distributed or paid.

     We are  asking  you to  contact  your  clients  for  whom you hold the
Company's  Common  Shares  registered  in your name, or in the name of your
nominee to obtain  instructions  with  respect to the  Rights.  You will be
reimbursed for customary  mailing and handling  expenses incurred by you in
forwarding any of the enclosed materials to your clients.  The Company will
pay all  transfer  taxes,  if any,  applicable  to the  sale  of  Series  B
Preferred  Stock to a Rights  Holder upon  exercise  of Rights,  subject to
certain exceptions described in the Prospectus and the Rights Certificate.

     Enclosed are copies of the following documents:

     1.   The Prospectus;

     2.   The Instructions;

     3.   A form  letter  which  may be  sent  to your  clients  for  whose
          accounts  you  hold  shares  of  the   Company's   Common  Shares
          registered in your name or the name of your  nominee,  with space
          provided for obtaining such clients'  instructions with regard to
          the Rights;

     4.   Rights Certificates;

     5.   A Nominee Holder Oversubscription Certification; and

     6.   A Notice of Guaranteed Delivery.

     Your prompt action is  requested.  The Rights will expire at 5:00 p.m.
Eastern  Standard Time, on  ___________  __, 1998,  unless  extended by the
Company (the "Expiration Date").

     TO  EXERCISE   RIGHTS,   PROPERLY   COMPLETED   AND   EXECUTED   RIGHT
CERTIFICATE(S)  (UNLESS THE  GUARANTEED  DELIVERY  PROCEDURES  ARE COMPLIED
WITH) AND PAYMENT IN FULL FOR ALL RIGHTS EXERCISED MUST BE DELIVERED TO THE
SUBSCRIPTION  AGENT AS INDICATED IN THE PROSPECTUS  PRIOR TO THE EXPIRATION
DATE.   EXERCISE  OF   OVERSUBSCRIPTION   PRIVILEGES  (AS  DEFINED  IN  THE
PROSPECTUS)   MUST   BE   ACCOMPANIED   BY  A   COMPLETE   NOMINEE   HOLDER
OVERSUBSCRIPTION CERTIFICATION.

     THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION,  THE SERIES B PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:  ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

     Additional copies of the enclosed  materials may be obtained from, and
Rights  holders   requesting   assistance  or  information  may  call,  the
Information Agent,  ChaseMellon Shareholder Services at 888-224-2745 in the
U.S. or Computershare Services, P.L.C. at 1179-370-672 in the U.K.

                                    Very truly yours,

                                    CLEAN DIESEL TECHNOLOGIES, INC.


                                    -------------------------------

                                    Jeremy D. Peter-Hoblyn
                                    President and Chief Executive Officer

     NOTHING HEREIN OR IN THE ENCLOSED  DOCUMENTS  SHALL  CONSTITUTE YOU OR
ANY PERSON AS AN AGENT OF THE COMPANY,  THE SUBSCRIPTION AGENT OR ANY OTHER
PERSON  MAKING  OR  DEEMED TO BE MAKING  OFFERS  OF THE  COMMON  STOCK,  OR
AUTHORIZE  YOU OR ANY OTHER PERSON TO MAKE ANY  STATEMENTS ON BEHALF OF ANY
OF THEM WITH RESPECT TO THE OFFERING,  EXCEPT FOR STATEMENTS EXPRESSLY MADE
IN THE PROSPECTUS OR THE SUBSCRIPTION DOCUMENTS.



                                                                    Exhibit 4h

           50,000 Shares of Series B Convertible Preferred Stock

                       CLEAN DIESEL TECHNOLOGIES, INC.

      Series B Convertible Preferred Stock (par value $0.05 per share)

                    Initially Offered Pursuant to Rights
                        Distributed to Shareholders

To Our Clients:

     Enclosed for your consideration are a Prospectus, dated ______ __,
1998 ("Prospectus"), and the Instructions as to Use of Rights Certificates
(the "Instructions") relating to the offering (the "Offering") of up to
50,000 shares of Series B Convertible Preferred Stock, par value $0.05 per
share (the "Series B Preferred Stock"), of Clean Diesel Technologies, Inc.
(the "Company"), at a price of $____ per share (the "Subscription Price")
pursuant to transferable rights ("Rights") distributed to holders of record
("Record Date Holders") of the Company's outstanding common shares, par
value $0.05 per share (the "Common Shares"), at the close of business on
________ ___, 1998 (the "Record Date"); provided, however, that Rights will
not be distributed to Record Date Holders who reside in jurisdictions where
the Rights have not been registered or where an exemption from registration
is not available, as more fully described in the Prospectus.

     As described in the accompanying Prospectus, you will receive one
Right for each 50 Common Shares carried by us in your account as of the
Record Date. Each Right will entitle you to subscribe for and purchase from
the Company one share of Series B Preferred Stock (the "Basic Subscription
Privilege") at the Subscription Price and each share of Series B Preferred
Stock will be immediately convertible, at no cost to the holder thereof,
into 33 Common Shares. If you fully exercise the Basic Subscription
Privilege you will also have the right (the "Oversubscription Privilege")
to subscribe, at the Subscription Price, for additional shares of Series B
Preferred Stock available after satisfaction of all subscriptions pursuant
to the Basic Subscription Privilege (the "Excess Shares"). If the number of
Excess Shares is not sufficient to satisfy all subscriptions pursuant to
the Oversubscription Privilege, the Excess Shares will be allocated pro
rata among those Rights Holders exercising the Oversubscription Privilege.

     Rights to exercise the Basic Subscription Privilege are transferable,
and Rights Holders that wish to sell their Rights may do so. There can be
no assurance, however, that a trading market in the Rights will develop
prior to their Expiration Date (as defined below). If a market develops for
the Rights, there is no assurance as to the price at which the Rights will
trade.

     The materials enclosed are being forwarded to you as the beneficial
owner of the Company's Common Shares carried by us in your account but not
registered in your name. Exercises and sales of Rights may only be made by
us as the registered holder of Rights and pursuant to your instructions.
Accordingly, we request instructions as to whether you wish us to elect to
subscribe for any Series B Preferred Stock or attempt to sell any Rights to
which you are entitled pursuant to the terms and subject to the conditions
set forth in the enclosed Prospectus and Instructions.

     Your instructions to us should be forwarded as promptly as possible to
permit us to exercise or sell Rights on your behalf in accordance with the
provisions of the Offering. The Offering will expire at 5:00 p.m. Eastern
Standard Time on_______ __, 1998, unless extended by the Company (the
"Expiration Date"). Once a Rights Holder has properly exercised the Basic
Subscription Privilege or the Oversubscription Privilege, such exercise may
not be revoked.

     If you wish to have us, on your behalf, exercise Rights to purchase
any Series B Preferred Stock to which you are entitled or attempt to sell
such Rights, please so instruct us by completing, executing and returning
to us the instruction form on the reverse side of this letter.

     THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION,  THE SERIES B PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:  ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

     IF WE DO NOT RECEIVE COMPLETE WRITTEN INSTRUCTIONS IN ACCORDANCE WITH
THE PROCEDURES OUTLINED IN THE PROSPECTUS, WE WILL NOT EXERCISE, TRANSFER
OR SELL YOUR RIGHTS, AND YOUR RIGHTS WILL EXPIRE VALUELESS.

     ANY QUESTIONS OR REQUESTS FOR ASSISTANCE CONCERNING THE OFFERING
SHOULD BE DIRECTED TO CHASEMELLON SHAREHOLDER SERVICES, [1-800-814-0304].

Very truly yours,

                                                                    Exhibit 4i


THE RIGHTS WILL ONLY BE GRANTED TO, AND MAY ONLY BE EXERCISED BY, INVESTORS
RESIDING IN THE FOLLOWING JURISDICTIONS WHERE THE SECURITIES OFFERED HEREBY
HAVE BEEN REGISTERED WITH THE APPROPRIATE SECURITIES REGULATORY AUTHORITIES
OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS  AVAILABLE:  OUTSIDE THE
UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE  DISTRICT OF  COLUMBIA,
ILLINOIS,  INDIANA, IOWA, KANSAS, MAINE, MARYLAND,  MASSACHUSETTS,  NEVADA,
NEW JERSEY, NEW YORK, NORTH CAROLINA,  RHODE ISLAND, VERMONT,  VIRGINIA AND
WASHINGTON.  RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS WHO RESIDE IN STATES
WHERE THE SECURITIES  OFFERED  HEREBY HAVE NOT BEEN  REGISTERED OR WHERE AN
EXEMPTION FROM  REGISTRATION  IS NOT AVAILABLE.  IN ADDITION,  THE SERIES B
PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS OF ANY OF THE FOLLOWING
STATES: ARIZONA, FLORIDA, GEORGIA, OHIO, PENNSYLVANIA OR TEXAS.

                      CLEAN DIESEL TECHNOLOGIES, INC.

                     INSTRUCTIONS TO RECORD DATE HOLDER

     The undersigned acknowledge(s) receipt of your letter and the enclosed
materials referred to therein relating to the offering of shares of Series
B Convertible Preferred Stock (the "Series B Preferred Stock").

     This will instruct you whether to exercise or attempt to sell Rights
to purchase Series B Preferred Stock distributed with respect to the Common
Shares held by you for the account of the undersigned, pursuant to the
terms and subject to the conditions set forth in the Prospectus and the
related Instructions as to Use of Rights Certificates.

     1.        Please DO NOT EXERCISE RIGHTS for shares of Series B
               Preferred Stock.

     2.        Please EXERCISE RIGHTS for shares of Series B Preferred
               Stock as set forth below:

          Basic Subscription Privilege: _________ x $____ = $_____(a)
                                       (no. of shares)

          Oversubscription Privilege: __________ x $____ = $_____(b)
                                      (no. of shares)

                            Total Payment Required = $____________(c)

               Payment in the following amount is enclosed: $__________(d)

               Please deduct payment from the following account maintained
               by you as follows:

               Type of Account ____________ Account No. ___________

     AMOUNT TO BE DEDUCTED: $__________(e)

     3.        Please attempt to SELL ________ RIGHTS.


- ------------------------------------------------------------------------------


- ------------------------------------
             Signature(s)
  Please type or print name(s) below

                                    
- ------------------------------------    Date:-------------------------, 1998


- ------------------------------------

- ------------------------------------------------------------------------------

                                                                    Exhibit 4j

                      CLEAN DIESEL TECHNOLOGIES, INC.
                              RIGHTS OFFERING
                           ---------------------

               DTC PARTICIPANT OVERSUBSCRIPTION EXERCISE FORM
                           ---------------------



THIS FORM IS TO BE USED ONLY BY DEPOSITORY  TRUST COMPANY  PARTICIPANTS  TO
EXERCISE THE  OVERSUBSCRIPTION  PRIVILEGE IN RESPECT OF RIGHTS WITH RESPECT
TO WHICH THE BASIC  SUBSCRIPTION  PRIVILEGE  WAS EXERCISED AND DELIVERED IN
FULL THROUGH THE  FACILITIES OF THE  DEPOSITORY  TRUST  COMPANY.  ALL OTHER
EXERCISES OF  OVERSUBSCRIPTION  PRIVILEGES MUST BE EFFECTED BY THE DELIVERY
OF RIGHTS CERTIFICATES.

                           ---------------------

THE  TERMS  AND  CONDITIONS  OF THE  RIGHTS  OFFERING  ARE SET FORTH IN THE
COMPANY'S  PROSPECTUS  DATED  _______ __, 1998 (THE  "PROSPECTUS")  AND ARE
INCORPORATED  HEREIN BY REFERENCE.  COPIES OF THE  PROSPECTUS ARE AVAILABLE
UPON REQUEST FROM THE COMPANY AND THE SUBSCRIPTION AGENT.

                           ---------------------

THE RIGHTS  WILL ONLY BE GRANTED  TO,  AND MAY ONLY BE  EXERCISED  BY,
INVESTORS  RESIDING IN THE  FOLLOWING  JURISDICTIONS  WHERE THE  SECURITIES
OFFERED  HEREBY  HAVE  BEEN  REGISTERED  WITH  THE  APPROPRIATE  SECURITIES
REGULATORY  AUTHORITIES  OR WHERE AN EXEMPTION  FROM SUCH  REGISTRATION  IS
AVAILABLE:  OUTSIDE THE UNITED  STATES AND IN  COLORADO,  CONNECTICUT,  THE
DISTRICT OF COLUMBIA,  ILLINOIS,  INDIANA,  IOWA, KANSAS, MAINE,  MARYLAND,
MASSACHUSETTS,  NEVADA, NEW JERSEY, NEW YORK, NORTH CAROLINA, RHODE ISLAND,
VERMONT, VIRGINIA AND WASHINGTON. RIGHTS WILL NOT BE DISTRIBUTED TO HOLDERS
WHO RESIDE IN STATES  WHERE THE  SECURITIES  OFFERED  HEREBY  HAVE NOT BEEN
REGISTERED OR WHERE AN EXEMPTION FROM  REGISTRATION  IS NOT  AVAILABLE.  IN
ADDITION,  THE SERIES B PREFERRED STOCK MAY NOT BE TRANSFERRED TO RESIDENTS
OF  ANY  OF  THE  FOLLOWING  STATES:  ARIZONA,   FLORIDA,   GEORGIA,  OHIO,
PENNSYLVANIA OR TEXAS.

VOID UNLESS RECEIVED BY THE SUBSCRIPTION AGENT WITH PAYMENT IN FULL BY 5:00
P.M.,  NEW YORK CITY  TIME,  ON  ________  __ 1998,  UNLESS  EXTENDED  (THE
"EXPIRATION DATE").

1.   The undersigned  hereby certifies to Clean Diesel  Technologies,  Inc.
     (the  "Company")  and  ChaseMellon   Shareholder   Services,   as  the
     Subscription  Agent,  that it is a participant in The Depository Trust
     Company  ("DTC"),  that it resides outside the United States or on one
     of the  following  states:  [to  come],  and  that it has  either  (i)
     exercised  in full the Basic  Subscription  Privilege  in  respect  of
     Rights and delivered such exercised Rights to the  Subscription  Agent
     by means of  transfer  to the DTC  account of the  Subscription  Agent
     designated in the  Prospectus,  or (ii) delivered to the  Subscription
     Agent a Notice of  Guaranteed  Delivery in respect of the  exercise in
     full of the Basic  Subscription  Privilege and will deliver the Rights
     called for in such Notice of Guaranteed  Delivery to the  Subscription
     Agent by means of  transfer  to such DTC  account of the  Subscription
     Agent.

2.   The undersigned  hereby  exercises the  Oversubscription  Privilege to
     purchase,  to the  extent  available,  ________  shares  of  Series  B
     Convertible  Preferred  Stock (the  "Series B  Preferred  Stock")  and
     certifies  to  the  Company  and  the  Subscription  Agent  that  such
     Oversubscription  Privilege  is being  exercised  for the  account  or
     accounts  of persons  (which may  include  the  undersigned)  on whose
     behalf the Basic Subscription Privilege was exercised in full.

3.   The undersigned  understands that payment of the Subscription Price of
     $____ per share for each share of Series B Preferred Stock  subscribed
     for pursuant to the Oversubscription Privilege must be received by the
     Subscription  Agent at or before the  Expiration  Date and  represents
     that such  payment,  in the  aggregate  amount of  $_________.  (check
     appropriate box):

     [   ]   has  been  or is  being  delivered  to the  Subscription  Agent
             pursuant to the Notice of Guaranteed Delivery referred to above;

     [   ]   is being delivered to the Subscription Agent herewith;

                       or

     [   ]   has been delivered separately to the Subscription Agent;

and, in the case of funds not delivered  pursuant to a Notice of Guaranteed
Delivery,  is or was  delivered  in  the  manner  set  forth  below  (check
appropriate box and complete information relating thereto):

     [   ]   wire transfer of funds:
             Name of transferor institution
                                           --------------------------------
             Date of transfer
                             ----------------------------------------------
             Confirmation number (if available)
                                               ----------------------------

     [  ]    uncertified check
     [  ]    certified or cashier's check
     [  ]    money order.


                                    --------------------------------------
                                    Bank Subscription Confirmation Number

                                    --------------------------------------
                                    DTC Participant Number

                                    --------------------------------------
                                    Name of DTC Participant

                                    By:
                                       -----------------------------------
                                       Name:
                                       Title:


Date: ____________ ___, 1998

PARTICIPANTS EXERCISING THE OVERSUBSCRIPTION PRIVILEGE PURSUANT HERETO MUST
SEPARATELY SUBMIT A NOMINEE HOLDER CERTIFICATION TO THE SUBSCRIPTION AGENT.

                                                                    Exhibit 4k

                      CLEAN DIESEL TECHNOLOGIES, INC.

                        NOMINEE HOLDER CERTIFICATION


The  undersigned,  a bank broker or other  nominee of Rights  ("Rights") to
purchase shares of Series B Convertible  Preferred  Stock,  par value $0.05
per share ("Series B Preferred Stock"), of Clean Diesel Technologies,  Inc.
(the "Company")  pursuant to the Rights Offering described and provided for
in the  Company's  Prospectus  dated  ______ __,  1998 (the  "Prospectus"),
hereby certifies to the Company and to ChaseMellon Shareholder Services, as
Subscription  Agent for such Rights Offering,  that (1) the undersigned has
exercised,  on behalf of the  beneficial  owners thereof (which may include
the  undersigned),  the number of Rights  specified  below  pursuant to the
Basic  Subscription  Privilege (as defined in the  Prospectus) on behalf of
beneficial  owners  of  Rights  who have  subscribed  for the  purchase  of
additional   shares  of  Series  B   Preferred   Stock   pursuant   to  the
Oversubscription   Privilege  (as  defined  in  the  Prospectus),   listing
separately below each such exercised Basic  Subscription  Privilege and the
corresponding  Oversubscription  Privilege  (without  identifying  any such
beneficial  owner),  (2) each such  beneficial  owner's Basic  Subscription
Privilege  has been  exercised  in full and (3) that each  such  beneficial
owner has indicated in writing that it resides outside the United States or
in Colorado,  Connecticut,  the District of  Columbia,  Illinois,  Indiana,
Iowa, Kansas, Maine, Maryland, Massachusetts, Nevada, New Jersey, New York,
North Carolina, Rhode Island, Vermont, Virginia, and Washington.


- ------------------------------------------------------------------------------
                                                           Number of Shares
     Number of Shares           Rights Pursuant to            Pursuant to
       Owned on the             Basic Subscription         Oversubscription
       Record Date                  Privilege                  Privilege
       -----------                  ---------                  ---------

- ------------------------------------------------------------------------------

1.
- ------------------------------------------------------------------------------

2.
- ------------------------------------------------------------------------------

3.
- ------------------------------------------------------------------------------

4.
- ------------------------------------------------------------------------------

5.
- ------------------------------------------------------------------------------

6.
- ------------------------------------------------------------------------------
7.
- ------------------------------------------------------------------------------

8.
- ------------------------------------------------------------------------------

9.

- ------------------------------------------------------------------------------

Provide the following information if applicable:


- ------------------------------------------------
Depository Trust Company ("DTC")
Participant Number


- ------------------------------------------------
DTC Basic Subscription Confirmation
Number(s)

                                                                Exhibit 10m

The omitted portions  indicated by brackets have been separately filed with
the  Securities  and  Exchange   Commission   pursuant  to  a  request  for
confidential treatment under Rule 406, promulgated under the Securities Act
of 1933, as amended.

                              SUPPLY AGREEMENT
                                  between
                      CLEAN DIESEL TECHNOLOGIES, INC.
                                   and
                       HOLT LLOYD INTERNATIONAL LTD.


AGREEMENT as of the 12th day of September, 1996 between Clean Diesel
Technologies, Inc., a Delaware corporation ("CDTI"), with a place of
business at Suite 702, 300 Atlantic Street, Stamford, Connecticut, U.S.A.
06901 and Holt Lloyd International Ltd. an English Company ("Holts"), with
a place of business at Lloyds House, Alderley Road, Wilmslow, Cheshire SK9
1QT, U.K.

Whereas CDTI desires to sell to Holts quantities of a proprietary, platinum
fuel catalyst and Holts desires to purchase quantities of such catalyst for
use with its diesel fuel additives.

NOW THEREFORE, the parties agree as follows:

1.   Definitions.

(a) "Holts" shall mean Holt Lloyd International Ltd. and the subsidiaries
of its ultimate holding company identified in Schedule C.

(b) "PFC" shall mean CDTI's proprietary Platinum Fuel Catalyst more
particularly identified as Platinum Plus(R) 3100-SC, a superconcentrated
product containing 2.0% by weight of platinum metal in a fuel soluble form,
and, the specified dose rate of 0.61 ml per 50 liters of diesel fuel,
providing 0.25 ppmw of platinum metal in treated fuel. Specifications for
the PFC are set on Schedule A-2.

(c) "Additives" shall mean Holts' diesel fuel additives containing or
intended to contain the PFC.

(d) "Application" shall mean the blending at Holts' expense of the PFC with
the Additives in containers of up to five liters for use in after-treatment
of fuel for both new and used diesel engines in the consumer car care
market.

(e) "Patents" shall mean those patents owned or licensed to CDTI as more
specifically set out on Schedule B-1.

(f) "Territories" shall mean each national jurisdiction or state worldwide
except in North, Central or South America.

(g) "Mark" shall mean the CDTI trademark "Platinum Plus(R)."

(h) "Minimum Performance Levels" shall mean the annual quantity in gallons
of PFC attributable to Holts' sale of its Additives in a particular
Territory.

(i) "Gallons" shall mean U.S. gallons, equivalent to 3.785 liters per
gallon.

(j) "Fixed Term" of this Agreement shall mean the term from the execution
of this Agreement until the tenth anniversary thereof.

(k) "Extended Term of this Agreement" shall mean the term from the
expiration of the Fixed Term until cancellation of this Agreement by either
party on ninety (90) days notice.

2.   Purchase and Sale.

CDTI agrees to supply and sell quantities of the PFC exclusively to Holts
for the Application for sale of the Additive in the Territories. Holts
agrees to accept and purchase the PFC exclusively from CDTI or its licensed
manufacturers only for the Application for sale in the Territories and to
pay to CDTI the price therefor set out below.

3.   License.

(a) CDTI does for the Fixed and Extended Terms of the Agreement license
Holts under the Patents to use and sell the PFC and to use the Mark, on an
exclusive, royalty-free basis, for the Application for sale of the
Additives in the Territories only. CDTI shall execute and deliver to Holts
from time to time such registered user agreements as may be appropriate to
use of the Mark in the Territories by Holts. Notwithstanding the foregoing,
Holts acknowledges CDTI's ownership of and interest in the Mark and agrees
that its use of the Mark shall not create in Holts favor any right, title
or interest in or to the Mark.

(b) Subject to agreement on Minimum Performance Levels by April 30, 1997,
CDTI shall not license any other party to use the Mark for diesel fuel or
diesel fuel additives in a Territory during the Fixed or Extended Terms of
this Agreement when Holts shall hold an exclusive license for the PFC and
the Mark for the Application in such Territory. CDTI shall itself retain
the right to market and sell the PFC to blenders and fuel suppliers under
the Mark.

4.   Obligations of Holts.

(a) Holts agrees to use its best efforts in the Territories to promote the
use of PFCs for the Application as beneficial in mobile diesels both new
and retrofit and will at its expense apply for certification of the PFC, or
the Additives as the case may be, with appropriate regulatory authorities
in the Territories.

(b) Holts will use the PFC according to the blending specifications agreed
by CDTI attached as Schedule A-1 and Holts will use all reasonable efforts
to assure that PFC is blended by Holts or its blenders at the concentration
recommended by CDTI. Holts will use due care in the blending of the PFC
with the Additives with a view toward protection of its employees or the
employees of its agents and contractors.

(c) Holts will use the Mark on the Additives containing the PFC and in all
advertising concerning such products and only on such Additives and in such
advertising. The packaging or labels for such Additives shall identify CDTI
as owner of the Mark in such style as from time to time may be approved by
CDTI, who shall act reasonably.

(d) Holts will notify CDTI as to those jurisdictions in the Territories and
to the classes where the Mark shall not have been registered and where
Holts requires the Mark to be registered in order to further project
sales of the Additives therein. CDTI will at its expense apply for
registration of the Mark in such jurisdictions. CDTI shall be the owner of
the Mark when so registered. Holts will reimburse CDTI for one-half of the
cost of the registration and annual maintenance of the Mark in such
jurisdictions, and for the classes where Holts requires the Mark to be
registered.

5.   Obligations of CDTI.

(a) CDTI will use its best efforts to assist Holts in its registration of
the Additives or the PFC, as the case may be, with the appropriate
regulatory authorities in the Territories, such efforts, however, shall not
require the preparation, compilation or delivery of data except data as
CDTI shall actually possess and shall not require testing expense, travel
expense, legal fees and filing fees to be incurred by CDTI.

(b) CDTI will provide to Holts standard product specification sheets (flash
point, dosing, etc.), material safety data sheets, and blending
instructions.

(c) CDTI will cause to be made a standard QC analysis on product provided
to Holts and make such analyses available to Holts.

(d) CDTI will not during the term of the Agreement sell PFC to other
parties for the Application (for the sale of additives similar to the
Additives) in the Territories, providing that by March 31st of each
calendar year the parties shall have used their reasonable efforts to agree
on Minimum Performance Levels for each territory for that calendar year. If
the parties cannot agree on a Minimum Performance Level for a specific
Territory, then Holts will have a non-exclusive license for that specific
Territory for the remainder of that calendar year which non-exclusive
license shall continue thereafter for the Fixed or Extended Terms of this
Agreement unless such non-exclusive license for such Territory is canceled
by CDTI with 90 days written notice.

(e) In the event that CDTI formulates an additive package that is
technically and commercially suitable for petrol engines, then CDTI shall
offer Holts the first right of refusal on a license on terms similar to
this Agreement. Product specifications and pricing may differ from this
Agreement.

6.   Pricing.

(a) The price per gallon of PFC through the year ended December 31, 1996 on
aggregate orders up to 100 gallons is:

            Volume                  $/gal PP 3100-SC
            ------                  ----------------
            Up to 100 gal.             $[      ]

(b) The price per gallon of PFC in excess of 100 gallons in 1996 and after
December 31, 1996 and through December 31, 1999, will be adjusted based on
the formula set out on Schedule D. After December 31, 1999, pricing of
orders will be agreed between CDTI and Holts in a written amendment to this
Agreement. If the parties cannot agree in good faith then this Agreement
may be terminated by either party with 90 days written notice. In the
course of such good faith negotiations either party may invoke the services
of a London U.K.-based mediator and the other party shall cooperate with
such mediator and both parties shall share the reasonable costs of such
mediation.

(c) Payment shall be net thirty (30) days from date of receipt at Holts
principal sites in the U.K. and France. Delayed payments shall incur a
service charge of 1.5% of the unpaid balance per month.

(d) Prices are exclusive of freight, customs duties, non-U.S. VAT sales or
similar taxes and any local transportation expense following the point of
delivery, such costs being for the account of Holts. Prices are inclusive
of shipping insurance premiums which are for the account of CDTI.

7.   Infringement.

(a) CDTI represents and warrants that to the best of its knowledge and
belief the use or sale of the PFC or the use of the Mark will not infringe
upon the claims of any patent or any trademark issued or to be issued to
third parties in the Territories.

(b) In the event of an infringement suit, or threatened infringement suit,
against Holts by reason of the use of the Mark or the use or sale of the
PFC furnished hereunder for the Application, and provided that Holts
notifies CDTI promptly in writing of any claim, or threatened claim, of
infringement and tenders to CDTI the defense thereof, CDTI at its option
agrees either to:

     (i) control and conduct at its own expense the defense of any such
claim or suit provided that Holts furnishes such assistance and information
at CDTI's expense as CDTI shall reasonably request, in which case CDTI
indemnifies Holts against all reasonable costs, losses and expenses
incurred and CDTI agrees to keep Holts informed of the progress of any such
matter, or

     (ii) reject the tender of the defense in which case CDTI indemnifies
Holts against all reasonable costs, losses and expenses of Holts in
defending against the claims of suit, provided that CDTI shall have the
right to be defended by its own counsel in such suit.

(c) Regardless of the option selected by CDTI in (b) above, its liability
shall not exceed the purchase price of the allegedly infringing goods, nor
shall CDTI be liable to Holts for any consequential or punitive damages. If
any injunction is issued against the further use of the allegedly
infringing goods, CDTI shall have the option of procuring for Holts the
right to use the goods or replacing them with a non-infringing product, as
long as Holts agrees that such product achieves the same performance as PFC
in the Application or of removing them and refunding the purchase price,
including costs of duty and freight.

8.   Prosecution of Infringements.

Both parties shall notify the other of facts which suggest that an
infringement of the Patents or the Mark in the Territories may be occurring
and shall consult as to the manner of dealing with such infringements.

9.   Orders; Quantities; Packing; Claims.

CDTI agrees to provide reasonable quantities of PFC in one (1) gallon
containers for trial market launches through April 30, 1997. For all orders
in quantity up to 100 gallons, Holts shall give CDTI thirty (30) days
notice of the quantity to be purchased and shipped each contract month and
for orders in excess of 100 gallons, Holts shall give CDTI ninety (90) days
notice thereof. No order shall be less than five (5) gallons. Unless Holts
specifies otherwise in writing, PFC orders will be packed as CDTI may deem
proper for protection against normal handling. An extra charge will be made
for special requirements imposed by Holts for preservation, waterproofing
and similar added protection or special packing of the PFC. The weights,
tares and tests fixed by CDTI's invoice shall govern unless proven to be
incorrect. Claims relating to quantity, quality, weight, condition and loss
of or damage to any of the PFC sold hereunder shall be waived by Holts
unless made in writing within thirty (30) days after receipt of a
particular PFC shipment by Holts at its manufacturing sites in the U.K. or
France.

10.  Title and Risk of Loss.

Title and Risk of Loss of all PFC shipments shall pass to Holts upon
delivery of a shipment by CDTI to Holts' specified point of delivery.

11.  Warranties.

CDTI warrants that (a) the PFC is of the quality set forth in CDTI's
specifications, attached as Schedule A-2, or as may be otherwise expressly
stated in this Agreement, and (b) the title conveyed is good and the
product is free from any lawful security interest, lien or encumbrance.
CDTI MAKES NO FURTHER REPRESENTATIONS OR WARRANTIES AS TO THE PFC, EXPRESS
OR IMPLIED, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

12.  Limitation of Liability; Insurance.

(a) With respect to the purchase and sale of the PFC hereunder, Holts'
exclusive remedy and CDTI's exclusive liability under the Agreement or
otherwise, shall be for compensatory damages for CDTI's breach of warranty
set forth herein, such liability shall not exceed so much of the purchase
price as is applicable to that portion of a particular shipment for which
damages are claimed and neither party shall be liable to the other for
consequential, statutory or punitive damages.

(b) Each of the parties hereto represents and warrants to the other that it
or its subsidiaries shall maintain during the Fixed and Extended Terms of
this Agreement, product liability insurance cover up to the limit of $2
million (U.S. dollars) in the aggregate and $1 million (U.S. dollars) per
claim, and $11 million of total overall coverage for claims arising out of
injury to persons or property alleged to have been caused by defects in or
use of either the Holts additives or the CDTI PFC, as the case may be. Such
policies of insurance shall be with insurance carriers of such standing and
capacity as shall be reasonably approved by the other party and shall be
properly licensed to issue the coverage contemplated herein.

(c) Each of the parties hereto does hereby indemnify and hold harmless the
other and the shareholders, directors, officers, and employees of the
other, but only up to the amount of the product liability insurance cover
required to be maintained hereunder, for all cost, expense (including the
fees and expenses of legal counsel), liability and damages imposed on such
other party and found to have been caused by defects in or use of the
party's product as contemplated hereunder, being Holts' additives or CDTI's
PFC, as the case may be.

(d) Each of the parties hereto shall cause the other party to be designated
as an additional insured under such party's product liability insurance
required hereunder and shall, from time to time on request of the other
party, procure from its insurance carrier and furnish to such other party
certificates evidencing such additional insured status.

(e) Each of the parties hereto shall cause its insurance carriers providing
the product liability cover required hereunder to waive subrogation with
respect to the other party.

13.  Force Majure.

Neither party shall be liable for its failure to perform hereunder if due
to any contingency beyond the reasonable control of the party affected,
including but not limited to acts of God, war, fire, bad weather, flood,
accident, labor trouble or shortage, civil disturbance, plant shutdown,
equipment failure, voluntary or involuntary compliance with any applicable
governmental regulation or order, or shortage or inability to obtain (on
terms deemed practicable by the party affected) any raw material (including
energy), equipment or transportation. CDTI shall not be obligated to
deliver the product from other than CDTI's production site in the U.S. and
there shall be no obligation to rebuild or repair any damage or destruction
to such production or shipping points in order to fulfill this contact.
During any period when CDTI is unable to supply the contract quantity of
the PFC, whether caused by the circumstances above or otherwise, CDTI may
allocate any available product among its customers on such basis as CDTI
deems fair and reasonable.

14.  Governmental Regulation.

CDTI may discontinue, limit or curtail production and sale of PFC due to
the requirements of governmental regulation, and may terminate the
Agreement on thirty (30) days written notice to Holts, if in CDTI's sole
and reasonable opinion such governmental regulations render the production,
marketing or transportation of PFC economically, technically or
commercially not feasible.

15.  Term of Agreement.

This Agreement shall remain in effect during the Fixed and Extended Terms
hereof.

16.  Applicable Law and Arbitration.

This Agreement shall be governed by the internal substantive laws of the
State of Delaware U.S.A. and the Federal Arbitration Act. This Agreement
and all questions of its interpretation or any claims or disputes with
respect to any of the transactions contemplated herein shall be determined
exclusively in binding arbitration before a single arbitrator under the
rules then in force of commercial arbitration of the American Arbitration
Association in New York, New York, U.S.A. Any award in such arbitration may
be entered in and enforced by any court having jurisdiction. Prior to
initiating arbitration the parties agree that they will for a period of not
less than sixty (60) days attempt to mediate all disputes and such
mediation shall involve at least one face to face discussion between the
parties. No arbitrator hereunder shall have any power to award
consequential, statutory or punitive damages. Notwithstanding the forgoing,
claims or disputes between the parties hereto shall be determined
judicially, where such claims or disputes arise in the course of a judicial
proceeding brought by a third party against one or both of the parties
hereto and one of such parties hereto shall seek reimbursement or indemnity
from the other party hereto and each of the parties hereto consents to the
jurisdiction of any court in which such judicial proceeding shall arise.

17.  Assignment.

Neither this Agreement nor any right or obligation hereunder is assignable
or transferable by either party in whole or in part without the prior
written consent of the other party and any such purported assignment
without such consent shall be void, except, however, upon a sale by a party
of all or substantially all of its business as a going concern.

18.  Notices.

All notices hereunder shall be in writing and directed to the addresses of
the parties set forth above or to such other address as shall be provided
by notice as stipulated herein, and shall be deemed received upon
transmission if by facsimile or hand delivery, or five (5) days after
transmission, if by mail.


IN WITNESS WHEREOF, the parties hereto have set their hands and seals as of
the date first written above.



CLEAN DIESEL TECHNOLOGIES, INC.     HOLT LLOYD INTERNATIONAL LTD.



By:                                 By:
   ---------------------------         ----------------------------

Title:                              Title:
   ---------------------------         ----------------------------


                                SCHEDULE A-1
                        CDTI/HOLTS SUPPLY AGREEMENT



                          PLATINUM PLUS(R) 3100-SC
                          ------------------------

                  PRODUCT BLENDING AND USE SPECIFICATIONS
                  ---------------------------------------


1.   Holts will blend Platinum Plus(R) 3100-SC with its additives according
     to the product application sheet supplied by CDTI so as to provide for
     a concentration of 0.25 ppm platinum in fuel treated with Platinum
     Plus(R) 3100-SC.

2.   Holts will use all reasonable means including the establishment of
     blending procedures and appropriate analyses of blended additives to
     assure that Holts and its blenders conform to the blending
     specifications.

3.   These specifications may not be altered without written authorization
     from CDTI.


                                SCHEDULE A-2

                        CDTI/HOLTS SUPPLY AGREEMENT

                          PLATINUM PLUS(R) 3100 SC
                           PRODUCT SPECIFICATIONS
                           ----------------------



                       SPECIFIED PHYSICAL PROPERTIES
                       -----------------------------


                                          Min.        Max.
                                          ----        ----

            Pt Content, Wt %              2.00        2.08

            Specific Gravity, 23-24oC     0.88        0.90

            Total Halide Content, ppm      ---        500



            (Full specifications to follow.)


                                SCHEDULE B-1
                        CDTI/HOLTS SUPPLY AGREEMENT

                      PATENTS LICENSED BY JURISDICTION
                      --------------------------------

Country              Patent No.     Issue Date  Title
- -------              ----------     ----------  ------

Australia            Pat. 583,580   05/04/89    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines

Europe (designated   Pat. 0189642   03/06/91    Fuel Additives and Fuel
contracting states:                             Containing Soluble Platinum
AT, BE, CH, FR, IT,                             Group Metal Compounds and
LI, LU, NL, SE)                                 Use in Internal Combustion
                                                Engines

Spain                Pat. 548,951   04/12/88    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines

United Kingdom       Pat. 2,178,757 10/19/88    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines

Greece               Pat. 85.2745   03/14/86    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines

Ireland              Pat. 58,723    10/21/93    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines

Japan                Pat. 1,931,531 05/12/95    Fuel Additives and Fuel
                                                Containing Soluble Platinum
                                                Group Metal Compounds and
                                                Use in Internal Combustion
                                                Engines


                                SCHEDULE B-2
                        CDTI/HOLTS SUPPLY AGREEMENT

                               PLATINUM PLUS
                       FOREIGN TRADEMARK APPLICATIONS
                       ------------------------------


Country           Filing Date       Serial No.        Registration No.
- -------           -----------       ----------        ----------------

China             Not available     Not available
China             Not available     Not available
China             Not available     Not available

EU Community      Not available     Not available

France            11/28/95          95/599 379        95/599 379

Great Britain     11/23/95          2,046,018

Indonesia         Not available     Not available
Indonesia         Not available     Not available
Indonesia         Not available     Not available

Japan             12/5/95           125415/95
Japan             12/5/95           124416/95
Japan             12/5/95           125417/95

Korea             11/27/95          44777/95
Korea             11/27/95          44778/95
Korea             12/27/95          11493/95

Mexico            12/6/95           249,675
Mexico            12/8/95           249,891

Taiwan            7/12/96           85034640
Taiwan            7/12/96           85034641


                                 SCHEDULE C
                        CDTI/HOLTS SUPPLY AGREEMENT

               HOLTS SUBSIDIARIES COVERED UNDER THE AGREEMENT
               ----------------------------------------------



                Holt Lloyd International Ltd.         U.K.
                Holt Lloyd Ltd.                       U.K.
                Holt Lloyd Export Ltd.                U.K.
                Carr & Day & Martin Ltd.              U.K.
                Holt Lloyd SA                         France
                Holt Lloyd GmbH                       Germany
                Holt Lloyd BV                         Holland
                Holt Lloyd Europa BV                  Holland/Belgium
                Holt Lloyd SpA                        Italy
                Holt Lloyd Ltd.                       Ireland
                Holt Lloyd SA                         Spain
                Holt Lloyd Australasia Pty. Ltd.      Australia
                Holt Lloyd Ltd.                       New Zealand
                Gamlen Environmental Services Ltd.    New Zealand
                Musashi Holt KK                       Japan
                Holts Pty. Ltd.                       South Africa

Holt Lloyd International Ltd. has a 35% shareholding in Holt Lloyd & Raposa
Lda., Portugal.


                                 SCHEDULE D

                          PLATINUM PLUS(R) 3100-SC
                         PRICE ADJUSTMENT SCHEDULE
                         -------------------------
                       (Valid after December 31, 1996
                       and through December 31, 1999)





1.   Base pricing is based on platinum at $400/T.O. and a product price of
     $3,300/U.S. gallon for the first 100 gallons, or through December 31,
     1996, whichever occurs first.

2.   Price on orders subsequent to December 31, 1996, and through December
     31, 1999 will be adjusted based on the following formula:

  Adjusted          Price of Platinum
Product Price =    at time of Order (FN*)  x (0.40) ($[  ]) + 0.60 ($[  ])
                  -----------------------
                   Base Price @ $400/T.O.


3.   Notwithstanding the foregoing, CDTI shall be entitled to a price
     adjustment if it shall be determined that the above pricing as
     escalated shall be grossly inequitable. In the course of discussions
     to alter this pricing structure, either party may invoke the services
     of a London U.K.-based mediator and the other party shall cooperate
     with such mediator and both parties shall share the reasonable costs
     of such mediator.





(FN*) Defined as platinum price confirmed by Johnson Matthey on date of
      written acceptance by CDTI of order.




                                                                Exhibit 10n

The omitted portions  indicated by brackets have been separately filed with
the  Securities  and  Exchange   Commission   pursuant  to  a  request  for
confidential treatment under Rule 406, promulgated under the Securities Act
of 1933, as amended.

                        JOINT DEVELOPMENT AGREEMENT
                        ---------------------------


     This Agreement is effective as of the 11th day of November 1996 by and
among Engelhard Corporation ("Engelhard") having a place of business at 101
Wood Avenue,  Iselin,  New Jersey 08830;  Clean Diesel  Technologies,  Inc.
("CDT")  having a place of  business  at 300  Atlantic  Street,  Suite 702,
Stamford,  Connecticut 06901; and Nalco Fuel Tech ("NFT") having a place of
business at 1001 Frontenac Road, Naperville, Illinois 60563.

     Engelhard has developed NOx reduction  catalysts and systems which can
reduce  NOx  emissions  in the  exhaust  stream  of diesel  engines  in the
presence of an amine-based  reagent through selective  catalytic  reduction
(SCR).

     CDT and NFT have  independently  developed and own  reagents,  reagent
injection  techniques,  injector designs,  metering  systems,  and computer
models that, in conjunction with an NOx reduction catalyst,  will reduce NOx
emissions from diesel engines.

     CDT,  NFT  and  Engelhard  wish  to  collaborate  on the  development,
demonstration,  and commercialization of a urea-based SCR System for use on
diesel engine power  generator sets  manufactured by Cummins Engine Company
("Cummins").

     Therefore, the parties agree as follows:

     1.  Engelhard,  CDT, and NFT will  collaborate  on the  selection  and
     testing of Engelhard  catalysts and reactors in  conjunction  with the
     CDT and NFT supplied reagent,  injectors, and metering equipment prior
     to the  prototype  testing of the System.  Pre-prototype  testing will
     take place at the Engelhard  engine lab during 1996 to define  overall
     system performance.

     2.  CDT and NFT will  share  confidential  Cummins  engine  data  with
     Engelhard for catalyst  selection and design,  based on  authorization
     from Cummins.  This sharing is contingent upon Engelhard  holding such
     information in strict confidence,  in accordance with the requirements
     of CDT's and NFT's Confidentiality Agreement with Cummins.

     3. Prototype testing of the System will take place in conjunction with
     Cummins on an engine  supplied by Cummins during 1997.  Engelhard will
     provide  catalysts  and  reactors  and CDT and NFT  will  provide  the
     reagent and  injection/metering  system. The timing and responsibility
     for testing shall be agreed by the parties in advance.

     4. Upon successful  completion of prototype  testing of the System and
     based on  agreement  by the  parties  with  Cummins  to  proceed  with
     commercialization  of the System, the parties shall support commercial
     performance and durability testing of the System as mutually agreed by
     the parties with Cummins.  Engelhard will provide catalyst and reactor
     and  CDT  and NFT  will  provide  the  injection/metering  system  and
     reagent.

          Unless  otherwise  agreed by the parties in  writing,  the direct
     cost of the engine,  engine operations,  emissions  monitor,  and data
     collection  during the  durability  testing  shall not exceed $[ ] per
     party, with each party paying one-third of the total.

     5.  Upon   successful   completion  of   durability   testing  to  the
     satisfaction  of the parties and Cummins,  the parties shall negotiate
     with Cummins for supply of  commercial  Systems.  CDT and NFT shall be
     the overall System supplier, with catalyst and reactor supplied to CDT
     and NFT by Engelhard based on mutually agreed price and terms.

     6. Parties confirm that they agree not to analyze or have analyzed any
     chemical   reagents,   injectors,   metering  equipment  or  catalysts
     (hereinafter   "Samples")   provided  by  one  party  to  another  for
     evaluation  during this  Agreement,  and that all such Samples will be
     provided  free of charge and shall be returned to the party  providing
     such Samples at the end of each test.

     7. (a) Each party shall have equal  access to the test results for all
     tests conducted in accordance  with this  Agreement.  Data and results
     resulting from the work completed during this program ("Subject Data")
     shall be jointly  owned by the  parties,  but no party  shall have the
     right to publish  or  disclose  such data  without  the prior  written
     consent of the other parties,  which consent will not be  unreasonably
     withheld.  Any  inventions  first  jointly  conceived  and  reduced to
     practice  from  the  work  completed  under  this  program   ("Subject
     Inventions") shall be owned by the parties. Any patents resulting from
     Subject  Inventions  will  be  owned  by NFT if  related  to  metering
     equipment or reagents,  and by Engelhard if related to catalyst.  Each
     of the two other  parties to this  agreement  shall  have a  worldwide
     royalty-free  license to make,  use, and sell subject to payment of a
     one-third  share  of  reasonable   patent   preparation,   filing  and
     maintenance costs. Any inventions  individually  conceived during this
     program or conceived  and reduced to practice  outside of this program
     will in no event be Subject Inventions. 

     (b) All inventions,  patents, patent applications,  data, know-how and
     other  intellectual  property in the  possession of or owned by any of
     the parties  prior to the Test shall remain the property of such party
     and no grant of any right or license  whatsoever  thereunder to any of
     the  other   parties  is   intended   hereby  or  should  be  implied,
     notwithstanding  that rights in any such intellectual  property may be
     necessary to enable a party to practice a Subject Invention. No rights
     or  obligations  other than those  expressly  recited herein are to be
     implied from this Agreement. Except as provided above, and relating to
     Subject  Inventions  and Subject Data,  no license is hereby  granted,
     directly or indirectly,  under any know-how or patent now or hereafter
     held by or licensed by any of the parties.

     9. This  Agreement  shall be governed by and  construed in  accordance
     with the internal  laws of the State of New Jersey  without  regard to
     the principle of conflict of laws.

     10. This Agreement  constitutes the entire  understanding  between the
     parties hereto with respect to the subject matter indicated above, and
     its terms may not be  changed or amended  except by an  instrument  in
     writing.


     IN WITNESS  WHEREOF,  the parties  have caused  this  Agreement  to be
signed in triplicate by their duly authorized representatives.


CLEAN DIESEL TECHNOLOGIES, INC.           ENGELHARD CORPORATION

By:                                       By:
   ------------------------------            ------------------------------

Name:  James M. Valentine                 Name:
     ----------------------------              ----------------------------

Title: Chief Operating Officer            Title:
      ---------------------------               ---------------------------

Date:                                     Date:
     ----------------------------              ----------------------------


NALCO FUEL TECH

By:
   ------------------------------

Name:
     ----------------------------
Title:
      ---------------------------
Date:
     ----------------------------

                                                                Exhibit 10o

The omitted portions indicated by brackets have been separately filed with
the Securities and Exchange Commission pursuant to a request for
confidential treatment under Rule 406, promulgated under the Securities Act
of 1933, as amended.

                                 AGREEMENT

This Agreement is made this seventeenth day of December, 1997 by and
between Clean Diesel Technologies, Inc., a Connecticut corporation having
its principal place of business at 300 Atlantic Street, Suite 702,
Stamford, CT 06901-3522 USA (hereinafter referred to as "CDT") and AMBAC
International, a Delaware corporation, having its principle place of
business at 103 Myron Street, West Springfield, MA 01089 (hereinafter
referred to as "AMBAC").

                                  RECITALS

WHEREAS, CDT and AMBAC have entered into a Non-Disclosure Agreement, dated
10 October 1997, and attached hereto as (Exhibit A), and

WHEREAS, said Non-Disclosure Agreement was concerned with the development,
production and application of a CDT Reagent Injection System, hereinafter
RIS; and

WHEREAS, CDT and AMBAC are desirous of working on a joint effort to cost
effectively design, manufacture and market the RIS; and

WHEREAS, CDT has the marketing capabilities to identify and to develop
various markets and application for the RIS; and

WHEREAS, CDT has opportunity to demonstrate an advanced system to industry,
and interested parties; and

WHEREAS, CDT has applied the present-state RIS technology to select
internal combustion engines, furnaces and boiler systems; and

WHEREAS, AMBAC has the technical, design, development skills and technology
to bring about an advanced system for use in over-the-road, as well as
stationary, diesel applications of the RIS; and

WHEREAS, AMBAC has the technical, manufacturing, and process skills to cost
effectively mass produce all or select components of the advanced RIS; and

WHEREAS, CDT and AMBAC desire to reduce their agreements to writing.

NOW, THEREFORE, in consideration of the premises, of the mutual covenants
herein contained, and of other good and valuable consideration, the receipt
and adequacy of which are hereby acknowledged, the parties hereby agree as
follows:

                                 ARTICLE I
                                DEFINITIONS

1.1  Reagent Injection System - The term "RIS", (Reagent Injection System),
     shall mean the concepts and embodiments of the systems for injection
     of reagents into exhaust gases of internal combustion engines,
     boilers, furnaces and heaters as designed and developed by CDT in
     whole or in part based upon patents, patent application and know how,
     owned or licensed by CDT as of the date of this Agreement. These
     patents and applications are listed in Exhibit "B" entitled CDT RIS
     PATENTS, attached hereto.

     Advanced Reagent Injection Reduction System - The term "ARIS"
     (Advanced Reagent Injection System), shall mean the concept and
     embodiment of the system, for application to internal combustion
     engines, furnaces, boilers and heaters, as will exist at the stage of
     production-readiness, subsequent to the joint design, test, and
     development efforts by CDT and AMBAC. The scope of the ARIS
     development program shall be as identified in Exhibit C (Attached
     hereto).

1.2  LICENSE AGREEMENT RESERVED

1.3  AMBAC. The term "AMBAC" shall mean AMBAC International, its
     successors, assigns, and agents.

1.4  CDT. The term "CDT" shall mean Clean Diesel Technologies, Inc., its
     successors, assigns, agents, and any subsidiaries or companies
     controlled by Clean Diesel Technologies, Inc., i.e. ownership of more
     than 50% of the voting stock.

1.5  The term "burdened engineering costs" shall mean costs in a range of
     $45.00 to $60.00 per hour as of the date of this agreement and changes
     to rates can be agreed upon at quarterly review meetings.

                                 ARTICLE II
                                  PARTIES

2.1  The Parties to this Agreement are Clean Diesel Technologies, Inc., a
     Delaware Corporation, and AMBAC International, a Delaware Corporation.

                                ARTICLE III
                          DUTIES OF CDT AND AMBAC

3.1  CDT and AMBAC agree to jointly share all relevant information and
     technology related to the cost effective design, prototype, test,
     development, production release, manufacture, process development, and
     distribution of the ARIS, to be applied to engines, boilers, furnaces
     and heaters subject to the non-disclosure Agreement.

3.2  CDT and AMBAC agree to share marketing data relating to uses and
     applications of the ARIS in whatever industry and wherever in the
     world such marketing may be applicable subject to the terms of
     confidentiality in Paragraph 11.1 below.

3.3  CDT and AMBAC agree to meet periodically, but no less often than every
     three (3) months to update, share and exchange the following:

          (a)  Quantity of ARIS anticipated to be sold in various markets
               during various calendar years; and

          (b)  Cost of producing the ARIS based upon the amortization of
               the tooling-capital and Sales and Volume projections
               developed in Section 3.3(a) above; and

          (c)  Cost of AMBAC burdened development engineering expenses
               expended in the development of a cost effective and readily
               manufactured ARIS; and

          (d)  Proposals of an Action Plan to meet the objectives of large
               volume-low cost supplier of ARIS based upon jointly
               developed cost-volume objectives;

                                 ARTICLE IV
                               DUTIES OF CDT

4.1  CDT will be responsible for the following tasks:

          (a)  Timely Provision to AMBAC of Performance Specifications,
               Initial Drawings, Test and Acceptance Criteria, known
               material incompatibilities, BOMs, target cost, etc., for the
               ARIS.

          (b)  Coordinating the ARIS demonstration to interested industry
               observers.

          (c)  Technical assistance to AMBAC on operation and testing of
               the ARIS.

          (d)  Technical and physical descriptions of standard components
               previously used in engine and boiler applications that are
               intended to be used in the ARIS, i.e., feed pumps, valving,
               piping, etc.

                                 ARTICLE V
                              DUTIES OF AMBAC

5.1  AMBAC will be responsible for the following tasks:

          (a)  Definition, design, development, and documentation of
               components configuration -- incorporating, as much as is
               possible, standard components as used in previous
               installations -- that result in a system capable of injecting
               urea-based reagents per specification through an injector
               that will lend itself to actuation by engine management
               control or other auxiliary controllers.

          (b)  Definition of the optimum mix of tooling and automation to
               achieve the cost-volume targets established by CDT and
               AMBAC.

          (c)  Actively participate in the concurrent engineering efforts
               to assure optimum producibility of the ARIS.

          (d)  Submission to CDT of a full review of proposed design for
               the purpose of concurrence prior to manufacture of prototype
               samples.

          (e)  Develop and sell to CDT, prototype/test "samples" at
               "out-of-pocket" (burdened) cost, whether such samples are
               procured internal to AMBAC or from an external supplier.
               AMBAC will expend its best effort to make the first samples
               available on or before February 15, 1998. Samples will be
               representative of "Production Intent" units.

                                 ARTICLE VI
                          DEVELOPMENT COST SHARING

6.1  Each party to this Agreement will be responsible for its own share of
     the development cost, with the following qualification: If prior to
     December 31, 2002, should CDT source manufacturing of the ARIS from
     another entity, not AMBAC, for reasons not related to any inability on
     the part of AMBAC to execute competitive production manufacturing, CDT
     will reimburse, fifty (50%) percent of AMBAC's burdened Engineering as
     reported in Section 3.3(c) of this Agreement. The engineering costs
     will be those costs expended and reported from the date this Agreement
     is signed until the Agreement is terminated in accordance with Section
     VIII or until 31 December 2000, whichever shall first occur. The
     payment will be made within sixty (60) days after the effective date
     of the termination with CDT reserving the right to audit such charges;
     however, upon mutual written consent, these engineering costs may be
     paid as royalty payments additional to those as described under
     Section 7.1(a) of this Agreement.

                                ARTICLE VII
                     ROYALTY PAYMENTS AND LICENSE FEES

7.1  CDT and AMBAC are committed to a "WIN-WIN" program and therefore there
     will be no Royalty or License fees payable to or from either company
     for any technology jointly or separately developed from the date of
     this Agreement until its termination unless the following occurs:

          (a)  If CDT is required to develop another company to manufacture
               the ARIS and such need to develop another company is not due
               to any inability of AMBAC to execute competitive production
               manufacturing, then CDT shall compensate AMBAC in the
               following manner for a three (3) year period:

               [ ]% of sales price if sold by CDT or

               [ ]% of CDT's Negotiated Royalty if licensed to a
               manufacturer.

               In the above cases AMBAC shall grant to CDT a worldwide
               license to manufacture the ARIS using any and all technology
               developed by AMBAC for production of the ARIS.

          (b)  If CDT is required to develop another company to manufacture
               the ARIS and such need to develop another company is due to
               any inability of AMBAC to execute competitive production
               manufacturing, other than unit cost, then CDT shall not be
               required to compensate AMBAC and AMBAC shall grant to CDT a
               rent-free, exclusive, worldwide license to manufacture the
               ARIS using any and all technology developed by AMBAC for
               production of the ARIS. Such technology shall be used by CDT
               or its sub-contractor, agent, or assign only for the
               purposes of manufacturing the ARIS.

          (c)  After five years, or earlier, upon mutual written agreement,
               AMBAC shall be permitted to use the ARIS for all of the
               applications that shall have been developed by AMBAC and
               first disclosed to CDT subject to the following Royalty
               schedule:

               [ ]% royalty of AMBAC sales price will be payable to CDT.

          (d)  If CDT is unable to grow the production volume of the ARIS
               as per the Production volume below, or has not released
               AMBAC as per 7.1 (c), above, AMBAC shall be permitted to use
               ARIS for all applications that shall have been developed by
               AMBAC, subject to the Royalty schedule of 7.1 (c).

                           Calendar Year                Production Volume
                           -------------                -----------------
                                2000                           [ ]
                                2001                           [ ]
                                2002                           [ ]

7.2  PATENTS. CDT shall retain all patent rights to the ARIS and any
     patents, applications or licenses as of the date of this agreement.
     Any patent or improvement that is independently developed by either
     company during the term of this Agreement and specifically related to
     the ARIS, shall be the Intellectual Property of the developer and said
     developer will grant non-exclusive, no-cost, worldwide cross license
     to such intellectual property for use on the ARIS to the
     non-developing party, subject to terms under 7. 1.

                                ARTICLE VIII
                     TERM AND TERMINATION OF AGREEMENT

8.1  TERM. The term of this Agreement shall continue until 3 November 2002,
     unless terminated earlier in accordance with this Article. Nothing in
     this Article shall be interpreted as precluding this Agreement from
     being renewed and extended beyond the Termination Date.

8.2  TERMINATION FOR BANKRUPTCY. Either party shall have the right, at its
     option, to terminate this Agreement by giving notice to the other
     party at least ten (10) business days before the termination is to be
     effective, if:

          (1)  The other party shall be adjudicated or become bankrupt or
               insolvent as that term is defined in 11 USC Section 101(32);

          (2)  The other party shall file a voluntary petition under any
               bankruptcy, reorganization, or insolvency law;

          (3)  The other party shall apply for or consent to appointment of
               a trustee or receiver to take possession of all or
               substantially all its assets;

          (4)  The other party shall consent to, or shall file an answer
               admitting the jurisdiction of the court and the material
               allegations of, an involuntary petition filed under any
               bankruptcy, reorganization, or insolvency law;

          (5)  Any proceedings of bankruptcy, reorganization, or insolvency
               shall be commenced against the other party and not be
               dismissed within 30 calendar days after commencement;

          (6)  The other party shall make any assignment for the benefit of
               creditors, or other arrangement or composition under any
               laws for the benefit of insolvent's;

          (7)  Any order shall be entered under any bankruptcy,
               reorganization, or insolvency law of any jurisdiction, and
               shall not be dismissed or stayed within thirty (30) calendar
               days after its entry (a) approving an involuntary petition
               seeking an arrangement with the creditors of the other
               party, (b) approving an involuntary petition seeking
               reorganization, or (c) appointing any receiver or trustee of
               all or a substantial part of the property of the other
               party;

          (8)  A trustee or receiver shall be appointed to take possession
               of all or substantially all assets of the other party and
               shall not be dismissed within thirty (30) calendar days
               after appointment; or

          (9)  Any writ of attachment, garnishment, or execution shall be
               levied against all or substantially all assets of the other
               party, or all or substantially all assets of the other party
               shall be subject to any attachment, garnishment, execution,
               or other judicial seizure, and shall not be removed,
               released, or bonded within thirty (30) calendar days after
               the date of the attachment, garnishment, execution, or other
               judicial seizure.

8.3  TERMINATION BY MUTUAL AGREEMENT. This Agreement shall terminate upon
     written agreement of all parties to this Agreement to terminate. The
     Termination shall be effective upon the date the Termination is signed
     or as may be mutually agreed.

                                 ARTICLE IX
                          RIGHTS AFTER TERMINATION

9.1  EFFECT OF TERMINATION. Upon termination or expiration of this
     Agreement each party shall:

          (a)  Return to the other party all Proprietary information; and

          (b)  Return all Promotional Material.

9.2  OPEN PURCHASE ORDERS. AMBAC shall promptly complete and deliver all
     Purchase Orders which are open at the date of termination or
     expiration of this Agreement.

9.3  SURVIVAL. The following Articles shall survive the Termination of this
     Agreement.

          ARTICLE X INDEMNIFICATION; ARTICLE XI INTELLECTUAL PROPERTY-
          CONFIDENTIALITY; ARTICLE VI DEVELOPMENT COST SHARING; ARTICLE VII
          ROYALTY PAYMENTS AND LICENSE FEES.

                                 ARTICLE X
                              INDEMNIFICATION

10.1 In the event that a product liability action or proceeding is brought
     against AMBAC or CDT related to ARIS or any application using the
     ARIS, each party shall as promptly as practical, forward to the other
     party every summons and complaint and hereby gives the other party the
     right to inspect every other court document received by it, and if the
     other party is a named party in the action, in no event shall the
     party take action of settlement without the prior notification of the
     other party of such proposed action followed by a reasonable period of
     time, not to exceed ten (10) calendar days to allow the other party to
     respond to such notification.

10.2 The parties shall promptly notify the other of any potential
     performance or safety-related defect in the ARIS or in any application
     that may use the ARIS in any manner whatsoever.

                                 ARTICLE XI
                  INTELLECTUAL PROPERTY - CONFIDENTIALITY

11.1 Each party (the "Recipient Party") acknowledges that the other party
     (the "Disclosing Party") may disclose Information to the Recipient
     Party which is reduced to writing and marked proprietary or
     confidential within thirty (30) days of disclosing to the Disclosing
     Party or other parties ("Proprietary Information"). The Recipient
     Party agrees to maintain in confidence and not to disclose to any
     party or reproduce or use except for the purpose of this Agreement any
     such Proprietary Information, except with the written consent of the
     Disclosing Party. The foregoing restriction on use and disclosure of
     the Proprietary Information will not apply:

          (a)  If the information was generally available to the public at
               the time of disclosure;

          (b)  If the information is already a written record in Recipient
               Party's files prior to its receipt, under circumstances
               permitting its disclosure by Recipient Party to other;

          (c)  If Recipient Party at any time lawfully obtains said
               Information from a third party under circumstances
               permitting its disclosure by Recipient Party to others;

          (d)  If the Information becomes part of the public domain through
               no fault of Recipient Party; or

          (e)  After two (2) years from the termination of this Agreement.
               Upon any termination of this Agreement all proprietary
               Information in the Recipient Party's possession shall be
               returned to the Disclosing Party at the request of
               Disclosing Party.

                                ARTICLE XII
                            TECHNICAL ASSISTANCE

12.1 CDT shall provide at its sole discretion any technical assistance,
     information and or materials that may be reasonably required for
     servicing, operating, and installing the ARIS.

12.2 CDT shall determine when the ARIS may be marketed and/or sold.

12.3 CDT, the OEM (if any), distributor or licensed agent, will be
     responsible for the cost of any application engineering that may be
     required for the application of the ARIS to internal combustion
     engines or boilers or heaters or furnaces.

12.4 CDT may request AMBAC to perform certain application engineering
     tasks, at a cost to be negotiated.

                                ARTICLE XIII
                               MISCELLANEOUS

13.1 FORCE MAJEURE. Any delay or failure of either party to perform its
     obligations hereunder shall be excused if, and to the extent that it
     is caused by an event or occurrence beyond the reasonable control of
     the party and with its fault or negligence, such as, by way of example
     and not by way of limitation, acts of God, actions by a governmental
     authority (whether valid or invalid), fires, floods, windstorms,
     explosions, riots, natural disasters, wars, sabotage, labor problems
     (including lockouts, strikes and slowdowns), inability to obtain
     power, material, labor equipment or transportation, or court injunction
     or order; provided that written notice of such delay (including the
     anticipated duration of the delay) shall be given by the affected
     party to the other party within ten (10) days. During the period of
     such delay or failure to perform by AMBAC, CDT at its option, may have
     the services to be performed by AMBAC hereunder performed by another
     party without liability to AMBAC. If requested by CDT, AMBAC shall,
     within ten (10) days of such request, provide adequate assurances that
     the delay shall not exceed thirty (30) days. If the delay lasts more
     than thirty (30) days or AMBAC does not provide adequate assurance
     that the delay will cease within thirty (30) days, CDT may immediately
     cancel this Agreement without liability. In the event such a period is
     experienced by CDT, wherein CDT is unable for reasons as stated above,
     to accept delivery on ordered and scheduled shipments, AMBAC, at its
     option, may produce such ordered and scheduled material, storing such
     undelivered material in a suitable location of its choice, invoking an
     inventory carrying charge calculated as Sales Price X 10% / 365 days X
     number of days beyond 30 days delay in shipment.

13.2 RESERVED

13.3 RESERVED

13.4 ADVERTISING. AMBAC shall not, without first obtaining the written
     consent of CDT, in any manner advertise or publish the fact that AMBAC
     has contracted to furnish the goods herein ordered, or use any
     trademarks or trade names of CDT in AMBAC's advertising or promotional
     materials. Neither party shall, without first obtaining the written
     consent of the other party, advertise or publish, in any manner, that
     AMBAC has contracted with CDT to furnish the goods which are the
     subject matter of this Agreement. CDT shall not advertise the product
     until authorized in writing by AMBAC, which mutual authorizations
     shall not be unreasonably withheld.

13.5 RELATIONSHIP OF PARTIES. CDT and AMBAC are independent contracting
     parties and nothing herein contained shall be construed to create a
     partnership, employment, joint venture or agency, and neither party
     shall be liable for the debts, obligations or responsibilities of the
     other. It is expressly agreed that neither party shall have any
     authority to assume or create any obligation or responsibility,
     express or implied, on behalf of or in the name of the other party or
     to bind the other party in any manner.

13.6 NOTICES. Any notice permitted or required under this Agreement shall
     be deemed to be given when sent if such notice shall be in writing and
     personally served, mailed by registered or certified air mail, postage
     prepaid evidenced by post office receipt of said registration or
     certification, or transmitted by electronic facsimile transfer with
     written confirmation personally served or mailed as heretofore
     provided to the addresses of the parties as follows:

            To CDT at:        Clean Diesel Technologies, Inc.
                              Attn.: Jim Valentine, TJ Tarabuski
                              300 Atlantic Street
                              Suite 702
                              Stamford, CT 06901-3522
                              (203) 327-7050

            To AMBAC at:      AMBAC International
                              Attn.: Gary Mistalski
                              103 Myron Street
                              West Springfield, MA 01089
                              (413) 785-6861

     Any party may change its address for purposes of this notice provision
     by giving the other parties written notice of the new address in the
     manner set forth above.

13.7 SUCCESSORS OF PARTIES. This Agreement shall be binding on, and shall
     inure to the benefit of the parties to it and their respective heirs,
     legal representatives, successors, and assigns.

13.8 ASSIGNMENT. Neither party shall assign or delegate its obligations
     under this Agreement without the others prior written consent and any
     attempt to make such an assignment or delegation without such consent
     shall be void.

13.9 NO IMPLIED WAIVER. The failure of either party at any time to require
     performance by the other party of any provision of this Agreement
     shall not in any way affect the right to require such performance at
     any time thereafter nor shall the waiver by of either party of a right
     hereunder or a breach of any provision of this Agreement constitute a
     continuing waiver or waiver of a right or similar breach. No waiver
     shall be binding unless executed in writing by the party making the
     waiver.

13.10 SEVERABILITY. If any term or provision hereof is declared void or
     unenforceable or becomes unlawful in its operation under any statue,
     regulation, ordinance, executive order or other rule of law, such term
     or provision shall be deemed reformed or deleted, but only to the
     extent necessary to comply with such statute, regulation, ordinance,
     order or rule, and the remaining provisions of this Agreement, which
     shall continue to be binding and remain in full force and effect.

13.11 GOVERNING LAW; ARBITRATION. This Agreement, its interpretation and
     any disputes or controversies concerning the transactions contemplated
     herein shall be governed by the internal substantive laws of Delaware
     and determined in final, binding arbitration before a single
     arbitration under the then rules of commercial arbitration of the
     American Arbitration Association (the "AAA"), in Stamford,
     Connecticut, if initiated by AMBAC, and in West Springfield,
     Massachusetts, if initiated by CDT. The arbitrator shall have no power
     to award consequential, statutory or punitive damages. Any award in
     arbitration may be entered in and enforced by any court having
     jurisdiction. Prior to commencement of arbitration proceedings, the
     parties shall participate in a period of mediation of not more than
     sixty (60) days under AAA rules.

13.12 HEADINGS. The headings of the articles and paragraphs of this
     Agreement have been herein only to facilitate reference and shall not
     be given any significance whatsoever in the construction and
     interpretation of this Agreement.

13.13 EXHIBITS APPENDED. There have been approved, appended, and made a
     part of this Agreement the following exhibits: "A" Non-Disclosure
     Agreement; "B", CDT Patents; "C" Scope of ARIS Development Program. In
     the event of any conflict, the provisions set forth in the body of
     this Agreement shall be deemed paramount.

13.14 ENTIRE AGREEMENT. This Agreement, together with any attachments,
     exhibits, or supplements, specifically referencing in this Agreement,
     constitutes the entire Agreement between CDT and AMBAC pertaining
     to the subject matter hereof. All prior and contemporaneous
     agreements, representations, negotiations and understanding of the
     parties, oral or written, are hereby superseded and merged herein.
     Each party to this Agreement expressly warrants and represents to the
     other that it has not relied upon any representation, inducement,
     promise or agreement, oral or otherwise, by any party, or anyone
     acting on behalf of any party, which is not embodied herein. No
     modification, waiver or amendment of this Agreement shall be binding
     unless fully executed in writing and signed by an authorized
     representative of each of the parties hereto.


IN WITNESS WHEREOF, the parties have caused this Agreement to be executed,
in duplicate, by their duly authorized representatives.

DATED: 18TH DECEMBER 1997

CLEAN DIESEL TECHNOLOGIES, INC.                 AMBAC INTERNATIONAL

BY:  /S/JIM VALENTINE                           BY:  /S/GARY MISTALSKI
      JIM VALENTINE                                  GARY MISTALSKI

TITLE:  CHIEF OPERATING OFFICER                 TITLE:  GENERAL MANAGER
                                                        WEST SPRINGFIELD
<PAGE>
                                                       Exhibit A to
                                                          Agreement

                         CONFIDENTIALITY AGREEMENT

This Confidentiality Agreement (hereinafter referred to as ("Agreement") is
entered into by and between

                      CLEAN DIESEL TECHNOLOGIES, INC.
                            300 Atlantic Street
                                 Suite 702
                        Stamford, CT 06901-3522 USA

                   (hereinafter referred to as "CDT") and

                            AMBAC INTERNATIONAL
                              103 Myron Street
                   West Springfield, Massachusetts 01089
                    (hereinafter referred to as "AMBAC")

both parties together hereinafter referred to as "Parties" or individually
hereinafter referred to as "Party."

                                  PREAMBLE

WHEREAS, CDT is in the business of designing, developing, and marketing
urea based selective catalytic reduction systems (SCR) and related devices
and reagents for the transportation and stationary power industries; and

WHEREAS, AMBAC amongst others is engaged in the business of design,
developing, manufacturing, sale, and distributing diesel fuel injection
products; and

WHEREAS, the Parties are interested to evaluate a business relationship in
which CDT develops (independently or jointly with AMBAC), designs, and
supplies to AMBAC certain selective catalytic reduction concepts, ideas,
and strategies which utilize AMBAC fuel injection equipment as is or with
slight variation, and CDT intends to market such systems; and

WHEREAS, the Parties are interested, but not obligated to exchange certain
Information (defined herein) pertinent and necessary to the conduct of the
Party's stated business relationship. Such "Information" may take the form
of drawings, electronic data, product or program descriptions; layouts or
renderings; timing or planning schedules; samples, parts, components or
systems; cars, models or prototypes; development, procedures,
specifications or standards; visual or audiovisual media; and/or any other
type of information, inclusive business or operational secrets; methods or
inventions; and

WHEREAS, the receiving Party agrees to maintain the confidentiality of such
Information.

NOW THEREFORE, the Parties hereto agree to the following:

1.   The purpose of this Agreement is to avoid transfer and disclosure of
     any of the Information so obtained/gathered and of further
     developments and copies thereof, to any third party, when the
     Information has been obtained

     - in the form of hard copies and clearly marked as confidential or as
       legally protected or
     - in any other form; e.g., data communication line or in any verbal
       discussion and stated as confidential or legally protected by the
       disclosing Party in a written form within 15 working days after
       disclosure. Information received in this way shall, within the above
       period, be treated as confidential by the receiving Party.

2.   Such Information must be used exclusively for the purposes set out in
     the provisions of the preamble. It shall be made accessible to the
     personnel of the receiving Party only insofar as required for such
     purposes, and shall be disclosed to third parties only after receipt
     of the prior written consent of the Party initially providing the
     Information.

3.   Subsequent to obtaining prior written consent from the disclosing
     Party to transfer/disclose certain limited Information to a specified
     third party for a clearly defined purpose, the receiving party may
     forward it only after receipt of written confirmation from such third
     party that it will avoid any further transfer/disclosure to any other
     third party and will use the Information only for such defined purpose
     and in accordance with the terms of this Agreement.

4.   The obligation of nondisclosure is not applicable to Information,

     - which is or becomes generally known other than by violation of this
       Agreement or
     - which is made available to the receiving Party by a third party, who
       was not subject to an obligation of nondisclosure and other than by
       violation of this Agreement or
     - of which the receiving Party can prove that it was already in
       possession prior to the effective date of this Agreement or of which
       it can prove independent development after the effective date.

5.   The Receiving Party of any Information hereunder agrees to handle
     Information with the same care it uses to avoid disclosure,
     publication, or circulation of any other type of its own information,
     documents, drawings, electronic data, descriptions, layouts,
     renderings, schedules, samples, parts, components, systems, models,
     prototypes, developments, procedures, specifications, standards,
     visual/audiovisual media, methods, business/operational secrets, or
     inventions, which are confidential.

6.   Neither of the Parties will derive rights from Information received,
     even if such rights are legally justified. All rights are reserved to
     each of the Parties, particularly insofar as the right to obtain
     patents and utility patents for their own inventions is concerned.

     Rights to Information disclosed are limited to such rights explicitly
     agreed herein, additional rights such as license right, copyright,
     right of use and others are not granted, regardless of whether any
     valid patent rights exist or not.

7.   a. An obligation to disclose Information is not agreed herein.

     b. Nothing contained herein shall be construed as granting any
     intellectual property rights except as expressly provided herein.

     c. Nothing in this Agreement shall be construed as obligating either
     Party to enter into a business arrangement with the other. Any such
     arrangement, and the terms and conditions thereof shall be agreed upon
     separately.

     d. Nothing in this Agreement shall preclude either Party from entering
     into a similar relationship with a third party.

8.   This Agreement becomes effective when it is executed by both Parties
     to this Agreement. It will expire three (3) years after the last date
     of execution, unless this Agreement is previously terminated by either
     Party hereto by giving the other Party at least three (3) months'
     advance notice of such termination in writing.

9.   With respect to any Information disclosed by either Party hereto to
     the other Party during the term of this Agreement, the obligations and
     restrictions set forth in clauses I - 5 above against the transfer,
     disclosure, and use of such Information shall end seven (7) years
     after disclosure of such Information and shall survive any expiration
     or termination of this Agreement prior to the end of such period.

10.  Upon request of the disclosing Party, any Information received shall
     be returned without undue delay at any time such a request has been
     received and automatically if the Agreement has been terminated. Any
     transcriptions, copies, records, and further developments thereof
     shall be destroyed or erased from any Data Processing system or media.
     Evidence of compliance hereof shall be provided by the receiving party
     upon written request of the disclosing Party.

11.  All agreements between the Parties are Included in this Agreement.
     Additional verbal agreements have not been made. Changes of and
     supplements to this Agreement must be agreed to in writing by both
     Parties to become effective, including any deviation from the
     aforementioned form requirement.

12.  If single provisions of this Agreement shall be or become invalid or
     unenforceable, the remaining provisions shall continue in full force
     and effect. The parties shall in this event be obliged to accept as
     the replacement for the invalid provision a valid provision which
     corresponds as far as possible to the spirit and the purpose of the
     invalid provision.

13.  The parties will work together in good faith to remedy any
     difficulties which may arise in connection therewith. In the event
     disputes do arise in connection with the Agreement which the Parties
     are unable to settle amicably, the dispute shall be finally settled by
     arbitration in accordance the then effective Rules of The American
     Arbitration Association by one arbitrator appointed in accordance with
     such Rules. The place of proper venue is Hartford, Connecticut, unless
     otherwise agreed to in writing by the Parties.

14.  This Agreement is executed in two counterparts, each of which shall be
     deemed an original.

IN WITNESS WHEREOF, the Parties hereto have executed this Agreement through
their duly authorized personnel on the dates set forth below. Each party
received one original version of this Agreement.

For:                                    For:

CLEAN DIESEL TECHNOLOGIES, INC.         AMBAC INTERNATIONAL

Name:                                   Name:
       --------------------------               --------------------------
Title:                                  Title: 
       --------------------------               --------------------------
Date:                                   Date:
       --------------------------               --------------------------
<PAGE>
                                                           Exhibit B to
                                                              Agreement

(A)  U. S. PATENT APPLICATION

     Reducing NOx Emissions from an Engine by Temperature-Controlled Urea
     Injection for Selective Catalytic Reduction

     J. D. Peter-Hoblyn, E. N. Balles, J. E. Hofmann, T. J. Tarabulski

     (Application submitted April 2, 1997)

(B)  U. S. PATENT APPLICATION

     Reducing NOx Emissions from an Engine While Maximizing Fuel Economy

     T. J. Tarabulski

     (Application submitted April 4, 1997)
<PAGE>



                                                             Exhibit C to
                                                                Agreement

                       SCHEMATIC DIAGRAM OF ARIS(TM)

                                                                   Exhibit 10q

              SUPPLEMENTAL AGREEMENT TO BRIDGE LOAN AGREEMENT

     Supplemental Agreement dated as of July 10, 1999 ("this Agreement") to
Bridge Loan Agreement dated as of May 8, 1998 (the "Loan  Agreement") among
Clean Diesel  Technologies,  Inc., a Delaware  corporation (the "Company"),
the  Lenders  under the Loan  Agreement  and the Lenders who have agreed to
become parties hereto as set forth on the attached  signature  pages,  (all
such Lenders being referred to collectively herein as the "Lenders").


                                Article 1.0
                     Definitions; Terms and Conditions

1.1  Definitions;   Terms  and  Conditions:  Rights  and  Obligations.  The
definitions  and the terms and  conditions  set forth in the Loan Agreement
shall be  applicable  to this  Agreement  as if fully set forth herein and,
unless  expressly  set  forth  herein  to  the  contrary,  the  rights  and
obligations  of the  Company  and the  Lenders in this  Agreement  shall be
identical to those set forth in the Loan Agreement.


                                Article 2.0
                             Supplemental Loan

2.1  Additional  Loan;  Purpose.  The Loan  Agreement is hereby  amended to
provide that the original  principal  amount of the Loan of One Million Two
Hundred Fifty Thousand Dollars (U.S.  $1,250,000.00) shall be increased and
supplemented  by an  addition  to the  Loan of up to  Seven  Hundred  Fifty
Thousand Dollars  (U.S.$750,000.00) (the "Supplemental Amount") for a total
aggregate amount of Loan of Two Million Dollars (U.S.  $2,000,000.00)  (the
"Total Loan"). The purpose of the Supplemental  Amount shall be the same as
set forth in the Loan Agreement.

2.2 Supplemental Lending. The Lenders by their execution of signature pages
to this  Agreement  agree to lend to the Company and the Company  agrees to
borrow  the  amounts  set  forth on such  signature  pages  hereto  as each
Lender's respective  Commitment hereunder and the Company shall deliver and
the Lenders  shall  accept a Note in form  similar to Exhibit B of the Loan
Agreement evidencing the lending of each such Commitment.


                                Article 3.0
             Consents; Security Agreement and Security Interest

3.1 Consents.  The several Lenders under the Loan Agreement  consent to the
lending by the  Lenders  hereunder  of the  Supplemental  Amount and to the
participation  by the  Lenders  hereunder  in  the  benefits  of  the  Loan
Agreement and Security Agreement, as amend, for so long as the Loan and the
Total Loan shall be outstanding.

3.2 Amendment of Security Agreement:  Supplemental Financing Statement. The
Company  and the  Lenders  agree  that the  lien  created  by the  Security
Agreement,  as amended,  shall secure the Total Loan  actually  made for so
long as it shall be  outstanding  and the  Security  Agreement  be,  and it
hereby is amended,  to provide that the Loan as defined  therein shall be a
sum equal to the Total Loan actually made and that a supplemental financing
statement be filed to reflect such amendment.

3.3 Amendment of Conversion  Limit. The limit of conversion of the Notes to
Series A Convertible  Preferred  Stock,  par value $0.05 per share,  of the
Company  (the  "Series A Stock") set forth in ss.3.1 of the Loan  Agreement
be, and it hereby is amended, to read 4,000.

3.4  Waiver  of  Conversion.  The  Lenders  hereby  waive  their  right  to
voluntarily  convert  the Notes to Series A Stock  until the earlier of (1)
January  31, 1999 or (2)  completion  by the Company of a private or public
sale of equity securities,  including rights to acquire securities,  of the
Company  pursuant  to which the  Company  shall  receive or be  entitled to
receive, net of the expenses and fees, discounts and commissions of lenders
or  investors,  underwriters,  placement  agents and  brokers  or  finders,
proceeds of at least U.S. $1,750,000.00.

IN WITNESS  WHEREOF,  the parties  hereto  have  caused  this  Supplemental
Agreement  to be duly  executed  by their  representatives  thereunto  duly
authorized, all as of the date first above written.

CLEAN DIESEL TECHNOLOGIES, INC.


By:  /s/ James M. Valentine
     ----------------------
     (Vice) President


PLATINUM PLUS, INC.


By:  /s/ Charles W. Grinnell
     -----------------------
     (Vice) President





S G ASSOCIATES LIMITED
As Agent for the Remaining
Lenders under Loan Agreement


By:  -----------------------
     Managing Director


The undersigned by its representative thereunto duly authorized does hereby
execute and deliver this  Supplemental  Agreement dated as of July 10, 1998
to Bridge Loan Agreement  dated as of May 8, 1998 and designates the amount
set forth below as its Commitment under such Agreement.

Amount of Commitment:   $ 150,000 (one hundred and fifty thousand US dollars)

  (Name of Lender)      POSITIVE SECURITIES LIMITED
                        31 The Parade, St. Helier
                        Jersey JE2 3QQ, Channel Islands

By:
    ------------------------
    Authorized Agent

                                                                   Exhibit 10r

           SECOND SUPPLEMENTAL AGREEMENT TO BRIDGE LOAN AGREEMENT

     Second Supplemental Agreement dated as of August 3, 1998 to Bridge
Loan Agreement dated as of May 8, 1998 (the "Loan Agreement") among Clean
Diesel Technologies, Inc., a Delaware corporation (the "Company"), the
Lenders under the Loan Agreement and the Lenders who have agreed to become
parties thereto pursuant to the Supplemental Bridge Loan Agreement dated as
of July 10, 1998 (collectively, the "Lenders").

                                Article 1.0
         Parri Passu Status with Other Convertible Preferred Stock

1.0. The undersigned Lenders hereby acknowledge and agree with the Company
and one another that, if and when any Lenders' Bridge Loan Note is
converted into Shares of Series A Convertible Preferred Stock, such Series
A convertible Preferred Stock will be treated parri passu in all respects,
upon a liquidation, dissolution or winding up of the Company, with ( i) the
Series B Convertible Preferred Stock that the Company proposes to issue and
(ii) any other class or series of Preferred Stock issued by the Company
which by its terms will be treated pari passu with the Series A Convertible
Preferred Stock and which is approved by the holders of at least 60% of the
shares of Series A Convertible Preferred Stock pursuant to Section
13(c)(ii) of the Certificate of Designation relating to the Series A
Convertible Preferred Stock.

IN WITNESS WHEREOF, the parties hereto have caused this Second Supplemental
Agreement to be duly executed by their representatives thereunto duly
authorized, all as of the date first above written.

CLEAN DIESEL TECHNOLOGIES, INC.

By: /s/ C.W. Grinnell
    -----------------
    (Vice) President



PLATINUM PLUS, INC.

By: /s/ S.M. Schecter
    -----------------
    (Vice) President




S G ASSOCIATES LIMITED
As Agent for the Remaining
Lenders under the Loan Agreement
and the Supplemental Loan Agreement.


By: /s/ D.R. Gray
    -------------
    Managing Director

                                                                   Exhibit 10s


                            EMPLOYMENT AGREEMENT


     AGREEMENT made as of the date set forth below by and between Jeremy D.
Peter-Hoblyn of Lamellen, Tudy, St. Bodmin, Cornwall,  England ("Employee")
and  Clean  Diesel   Technologies,   Inc.,  a  Delaware   corporation  (the
"Company"),  having a place of business at Suite 702, 300 Atlantic  Street,
Stamford, CT 06901.

     WHEREAS,  the Company desires certain services for itself and Employee
desires to contract with the Company to perform such services;

     NOW THEREFORE,  in consideration  of the mutual covenants  hereinafter
recited,  the  sufficiency  of which is hereby  acknowledged,  the  parties
hereto agree as follows:

          1. Term:  This  Agreement  shall commence on the date of grant to
Employee of a United States L-1 visa and shall  continue  thereafter  until
terminated by either party as provided below.

          2.  Scope of Work;  Title:  Employee  shall be  appointed  as the
President  and Chief  Executive  Officer of the Company.  The Company shall
also  during  the term of this  agreement  cause  Employee  annually  to be
nominated as a director of the Company. In such employment,  Employee shall
on a full-time  basis direct all of his efforts  toward the  performance of
such duties as shall be assigned  to him by the Board of  Directors  of the
Company  acting  through  its  Chairman.  "Full  time"  shall mean no other
substantial outside business activities.

          3. Salary;  Benefits:  The Company agrees to cause Employee to be
paid for his  services  hereunder  at the rate of  US$250,000.00  per year.
Employee to be paid such amounts by the Company according to its normal and
customary  procedures  from time to time in effect  but not less often than
monthly.  Employee  shall be entitled to  participate  from time to time in
such  benefit  programs,  or  equivalent,  as shall  have  heretofore  been
extended  to  him by  the  Company's  predecessor,  Fuel-Tech  N.V.  or its
affiliates.  Additionally,  the Company  shall expend up to $50,000 for the
annual  premium for a U.K.  based annuity for you (less such amounts as you
may  receive  from  the  Company's  401K or  profit  sharing  plans).  This
agreement may not be construed to prevent the Company from  rescinding  any
such other benefit programs for Employee so long as such rescission applies
to officers as a class.

          4. Expenses:  Employee shall be reimbursed by the Company for all
ordinary  and  necessary  out-of-pocket  expenses  incurred  by Employee in
performing  his  services  hereunder.  Such  expenses to be  reported  from
time-to-time by Employee on the Company's customary forms of expense report
and submitted for approval to the Chairman of the Board of the Company.

          5. Termination of Employment:  (a) Just Cause. The Company may at
any time  terminate  this  agreement for Just Cause.  Just Cause shall mean
conviction of the employee  under,  or a plea of guilty by the Employee to,
any charge which would  constitute a felony under the laws of  Connecticut;
any  instance  of fraud,  embezzlement,  self-dealing,  insider  trading or
similar  malfeasance with respect to the Company;  or substance abuse which
shall,  in the sole  discretion  of the Board of  Directors of the Company,
limit Employee's performance of his duties.

               (b)  Disability.  The Company may terminate  this  agreement
upon the physical disability of Employee,  if the Directors shall determine
that,  as a result of physical  disability  Employee  has for a  continuous
period of six months been substantially  absent from his customary place of
work and unable to perform his customary duties.

               (c) At Will.  Either of Employee  or Company  may  terminate
this  agreement on written  notice one to the other.  Where  Employee shall
terminate  this  agreement by resigning  his  employment,  he shall provide
twelve  month's  written  notice  thereof to Company.  Where  Company shall
terminate  this  agreement,   Company  shall  provide  salary  and  benefit
continuation  (in the amount and of the nature then enjoyed by Employee) to
the Employee  month-to-month  for a period of one year,  or until  Employee
shall sooner find other substantially comparable employment.

          6.   Discoveries   and   Inventions:   (a)  All   patentable  and
unpatentable inventions,  discoveries and ideas which are made or conceived
by Employee during the term of his employment,  and which are based upon or
arise out of Employee's  services hereunder  ("Developments")  are or shall
become the Company's property.  Employee agrees to disclose promptly to the
Company each such  Development  and, upon the Company's  request and at its
expense,  Employee  will assist the  Company,  or its  designee,  in making
application  for  Letters  Patent in any  country  in the  world.  Employee
further  agrees  to  execute  all  papers  and do all  things  which may be
necessary or advisable to prosecute such  applications,  and to transfer to
and vest in the Company, or its designee, all the right, title and interest
in and to such  Developments,  and all applications for patents and Letters
Patent issued thereon. If for any reason Employee is unable to effectuate a
full assignment of any such Development, Employee agrees to transfer to the
Company, or its designee,  Employee's  transferable rights, whether they be
exclusive or non-exclusive,  or as a joint inventor or partial owner of the
Development.  No action or inaction  by the  Company  shall in any event be
construed as a waiver or abandonment of its rights to any such  Development
except an instrument in writing  assigned by an authorized  official of the
Company  by which it  specifically  states it  intends  to be bound in such
respect.

          7. Proprietary Information: Employee will not at any time, either
during the term of this Agreement or thereafter, disclose to others, or use
for his own benefit or the benefit of others,  any of the  Developments  or
any confidential,  proprietary or secret  information  owned,  possessed or
used by the Company or any of its subsidiaries or affiliates (collectively,
"Proprietary  Information"),   which,  by  way  of  illustration,  but  not
limitation,   includes  devices,  structures,   machines,  data,  know-how,
business opportunities,  marketing plans, forecasts,  unpublished financial
statements,  budgets,  licenses and information  concerning prices,  costs,
employees, customers and suppliers. Employee's undertakings and obligations
under this Paragraph 7 will not apply to any Proprietary Information which:
(a) is or becomes  generally  known to the public  through no action on the
part of the Employee or (b) is generally  disclosed to third parties by the
Company or any of its  subsidiaries  or affiliates  without  restriction on
such third parties. Upon termination of this Agreement or at any other time
upon  request,  Employee  will  promptly  deliver to the Company all notes,
memoranda,  notebooks, computer disks, drawings, designs, three dimensional
figures, photographs,  layouts, diagrams, records, reports, files and other
documents  (and all  copies  or  reproductions  of such  materials)  in his
possession or under his control,  whether prepared by him or others,  which
contain Proprietary  Information.  Employee acknowledges that this material
is the sole  property of the Company or a subsidiary or an affiliate of the
Company.

          8.  Non-Competition:  Following the termination of Employment for
any reason, Employee agrees that Employee will not recruit,  entice, induce
or encourage any of the Company's  other employees or consultants to engage
in any  activity  which,  were it  done  by  Employee,  would  violate  any
provision of this  Agreement.  For a two-year  period after  termination of
employment  Employee  will not  accept  employment  or  provide  consulting
services where such employment or services  reasonably will involve the use
of  Proprietary  Information  for the benefit of others or the divulging of
Proprietary Information.  During such two-year period and before performing
any services for others,  as employee or consultant  or  otherwise,  in the
actual lines of business in which  Employee has performed  services for the
Company,  its subsidiaries or affiliates,  Employee will notify the Company
of the general  nature of the  services to be  performed  and the party for
whom they will be performed and Employee will,  also,  prior to undertaking
such service or employment  inform the other party of the existence of this
covenant in this  Agreement.  Employee  admits that breach of his covenants
hereunder  regarding the  Company's  Proprietary  information  is likely to
cause serious economic injury to the Company.

          9. Assignment: This Agreement may not be assigned by either party
without the prior written consent of the other party.

          10. Continuing Obligations: The Employee's covenants set forth in
Sections  6,  7,  and 8 above  shall  continue  according  to  their  terms
following the  termination  of this  Agreement,  and,  notwithstanding  the
provision  for  arbitration  below,  such  covenants  may  at any  time  be
judicially enforced by the Company by injunction.

          11.  Governing  Law;  Arbitration.  This  agreement,  any and all
disputes  hereunder or the  interpretation  hereof or any claim by Employee
against the Company shall be governed by and interpreted  under Connecticut
procedural and substantive law, and thirty (30) days after notice, shall be
determined  solely by arbitration  before a single  arbitrator in Stamford,
Connecticut,  under  the  employment  rules  of  the  American  Arbitration
Association in effect as of the date of this agreement or otherwise  agreed
by the parties.  The  arbitrator  shall have no power or authority to award
exemplary or punitive  damages or any statutory or  compounded  damages and
shall  render  his  award  in  writing  setting  forth  the  basis  of  his
determination.  The award of the arbitrator  shall be based on the terms of
this  agreement  and the law. Such award shall be final and binding and may
be entered into and enforced in any Court having jurisdiction.

          12.  Exclusivity:  The rights of Employee against the Company are
not limited in any way by this  Agreement,  and are not  intended to be set
forth  exclusively  hereunder;  provided,  however,  that  any  and  all of
Employee's remedies with respect to such rights, shall be limited solely to
those  available  in  arbitration  hereunder.  Employee's  rights to salary
continuation are in lieu of any severance  benefits provided under policies
of the Company from time to time in effect.

          13. Waiver.  The remedies of Employee hereunder have been entered
into as a  matter  of  bargain  and to the  extent  any  provision  of this
agreement  is or may be  construed  as a  waiver  of  employee's  remedies,
Employee does hereby waive such remedies.

          14. Notices.  All notices hereunder shall be in writing and shall
be deemed effective upon receipt, if hand delivered or if sent by facsimile
and acknowledged  electronically and confirmed by an original  confirmation
copy mailed first class  postage  prepaid.  Notices by mail or  air-courier
service shall be deemed effective upon receipt, if sent first class postage
prepaid  return receipt  requested or by  air-courier  and the sender shall
obtain the signed  receipt  or  confirmation  of  delivery  by the  courier
service.  Otherwise,  notices shall be deemed effective as of the fifth day
after  transmission.  In each  case  notices  shall be  transmitted  to the
address  first given above or such other  address as may be given by notice
as provided herein.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first above written.

EMPLOYEE                            CLEAN DIESEL TECHNOLOGIES, INC.



   /s/ Jeremy D. Peter-Hoblyn           /s/ Charles W. Grinnell
- ---------------------------------     -----------------------------------
Jeremy D. Peter-Hoblyn                Charles W. Grinnell, Vice President




Date:  December 2, 1996               Date:  December 2, 1996
       --------------------------            ----------------------------

                                                                   Exhibit 10t

                            EMPLOYMENT AGREEMENT



     AGREEMENT  made as of the date set forth below by and between James M.
Valentine,  480 Hemlock Road,  Fairfield,  CT 06430  ("Employee") and Clean
Diesel Technologies, Inc., a Delaware corporation (the "Company"), having a
place of business at Suite 702, 300 Atlantic Street, Stamford, CT 06901.

     WHEREAS,  the Company desires certain services for itself and Employee
desires to contract with the Company to perform such services;

     NOW THEREFORE,  in consideration  of the mutual covenants  hereinafter
recited,  the  sufficiency  of which is hereby  acknowledged,  the  parties
hereto agree as follows:

     1. Term:  This  Agreement  shall commence on August 1, 1996, and shall
continue thereafter until terminated by either party as provided below.

     2. Scope of Work: Title:  Employee shall be appointed as the Executive
Vice  President  and Chief  Operating  Officer of the Company.  The Company
shall also during the term of this agreement cause Employee  annually to be
nominated as a director of the Company. In such employment,  Employee shall
on a full-time  basis direct all of his efforts  toward the  performance of
such  duties  as  shall  be  assigned  to him by the  President  and  Chief
Executive  Officer.  "Full  time" shall mean no other  substantial  outside
business activities.

     3. Salary:  Benefits:  The Company agrees to cause Employee to be paid
for his services hereunder at the rate of US$220,000.00 per year.  Employee
to be  paid  such  amounts  by the  Company  according  to its  normal  and
customary  procedures  from time to time in effect  but not less often than
monthly.  Employee  shall be entitled to  participate  from time to time in
such benefit programs as the Company may customarily extend to its officers
as a class. This agreement may not be construed to prevent the Company from
rescinding  other benefit  programs for Employee so long as such rescission
applies to officers as a class.

     4.  Expenses:  Employee  shall be  reimbursed  by the  Company for all
ordinary  and  necessary  out-of-pocket  expenses  incurred  by Employee in
performing his services  hereunder.  Such expenses to be reported from time
to time by Employee on the Company's  customary  form of expense report and
submitted for approval of the Company.

     5.  Termination of Employment:  (a) Just Cause. The Company may at any
time  terminate  this  agreement  for Just  Cause.  Just  Cause  shall mean
conviction of the employee  under,  or a plea of guilty by the Employee to,
any charge which would  constitute a felony under the laws of  Connecticut;
any  instance  of fraud,  embezzlement,  self-dealing,  insider  trading or
similar  malfeasance with respect to the Company;  or substance abuse which
shall,  in the sole  discretion  of the Board of  Directors of the Company,
limit Employee's performance of his duties.

          (b) Disability. The Company may terminate this agreement upon the
physical disability of Employee.  If the Directors shall determine that, as
a result of physical disability Employee has for a continuous period of six
months  been  substantially  absent  from his  customary  place of work and
unable to perform his customary duties.

          (c) At Will.  Either of Employee or Company  may  terminate  this
agreement  on  written  notice  one  to the  other.  Where  Employee  shall
terminate  this  agreement by resigning  his  employment,  he shall provide
twelve  month's  written  notice  thereof to Company.  Where  Company shall
terminate  this  agreement,   Company  shall  provide  salary  and  benefit
continuation  (in the amount and of the nature then enjoyed by Employee) to
the Employee  month-to-month  for a period of one year,  or until  Employee
shall sooner find other substantially comparable employment.

     6.  Discoveries  and Inventions:  (a) All patentable and  unpatentable
inventions,  discoveries  and ideas which are made or conceived by Employee
during the term of his employment, and which are based upon or arise out of
Employee  services  hereunder  ("Developments")  are or  shall  become  the
Company's  property.  Employee  agrees to disclose  promptly to the Company
each such Development  and, upon the Company's  request and at its expense,
Employee will assist the Company,  or its designee,  in making  application
for Letters Patent in any country in the world.  Employee further agrees to
execute all papers and do all things which may be necessary or advisable to
prosecute such applications, and to transfer to and vest in the Company, or
its  designee,   all  the  right,   title  and  interest  in  and  to  such
Developments,  and all  applications  for patents and Letters Patent issued
thereon.  If for  any  reason  Employee  is  unable  to  effectuate  a full
assignment  of any such  Development,  Employee  agrees to  transfer to the
Company, or its designee,  Employee's  transferable rights, whether they be
exclusive or non-exclusive,  or as a joint inventor or partial owner of the
Development.  No action or inaction  by the  Company  shall in any event be
construed as a waiver or abandonment of its rights to any such  Development
except an instrument in writing  assigned by an authorized  official of the
Company  by which it  specifically  states it  intends  to be bound in such
respect.

     7.  Proprietary  Information:  Employee  will not at any time,  either
during the term of this Agreement or thereafter, disclose to others, or use
for his own benefit or the benefit of others,  any of the  Developments  or
any confidential,  proprietary or secret  information  owned,  possessed or
used by the Company or any of its subsidiaries or affiliates (collectively,
"Proprietary  Information"),   which,  by  way  of  illustration,  but  not
limitation,   includes  devices,  structures,   machines,  data,  know-how,
business opportunities,  marketing plans, forecasts,  unpublished financial
statements,  budgets,  licenses and information  concerning prices,  costs,
employees, customers and suppliers. Employee's undertakings and obligations
under this Paragraph 7 will not apply to any Proprietary Information which:
(a) is or becomes  generally  known to the public through no action on part
of the  Employee  or (b) is  generally  disclosed  to third  parties by the
Company or any of its  subsidiaries  or affiliates  without  restriction on
such third parties. Upon termination of this Agreement or at any other time
upon  request,  Employee  will  promptly  deliver to the Company all notes,
memoranda,  notebooks, computer disks, drawings, designs, three dimensional
figures, photographs,  layouts, diagrams, records, reports, files and other
documents  (and all  copies  or  reproductions  of such  materials)  in his
possession  or under his control,  whether  prepared by him or others which
contain Proprietary  Information.  Employee acknowledges that this material
is the sole  property of the Company or a subsidiary or an affiliate of the
Company.

     8.  Non-Competition:  Following the  termination of Employment for any
reason,  Employee agrees that Employee will not recruit,  entice, induce or
encourage any of the Company's  other employees or consultants to engage in
any activity which,  were it done by Employee,  would violate any provision
of this Agreement.  For a two-year  period after  termination of employment
and before performing any services for others, as employee or consultant or
otherwise,  in the actual lines of business in which Employee has performed
services for the Company,  its  subsidiaries  or affiliates,  Employee will
notify the Company of the general  nature of the  services to be  performed
and the party for whom they will be  performed  and  Employee  will,  also,
prior to undertaking  such service or employment  inform the other party of
the  existence  of this  covenant in this  Agreement  Employee  admits that
breach of his  covenants  hereunder  regarding  the  Company's  Proprietary
information is likely to cause serious economic injury to the Company.

     9.  Assignment:  This  Agreement  may not be assigned by either  party
without the prior written consent of the other party.

     10.Continuing  Obligations:  The  Employee's  covenants  set  forth in
Sections  6,  7,  and 8 above  shall  continue  according  to  their  terms
following the  termination  of this  Agreement,  and,  notwithstanding  the
provision  for  arbitration  below,  such  covenants  may  at any  time  be
judicially enforced by the Company by Injunction.

     11.Governing Law:  Arbitration.  This agreement,  any and all disputes
hereunder or the interpretation hereof or any claim by Employee against the
Company shall be governed by and interpreted under  Connecticut  procedural
and substantive law, and thirty (30) days after notice, shall be determined
solely by arbitration before a single arbitrator in Stamford,  Connecticut,
under the  employment  rules of the  American  Arbitration  Association  in
effect as of the date of this agreement or otherwise agreed by the parties.
The  arbitrator  shall have no power or  authority  to award  exemplary  or
punitive  damages or any statutory or  compounded  damages and shall render
his award in  writing  setting  forth the basis of his  determination.  The
award of the  arbitrator  shall be based on the terms of this agreement and
the law.  Such award shall be final and binding and may be entered into and
enforced in any Court having jurisdiction.

     12.Exclusivity.  The rights of  Employee  against  the Company are not
limited in any way by this Agreement,  and are not intended to be set forth
exclusively  hereunder;  provided,  however, that any and all of Employee's
remedies  with  respect to such  rights,  shall be limited  solely to those
available   in   arbitration   hereunder.   Employee's   rights  to  salary
continuation are in lieu of any severance  benefits provided under policies
of the Company from time to time in effect.

     13.Waiver.  The remedies of Employee  hereunder have been entered into
as a matter of bargain and to the extent any provision of this agreement is
or may be  construed  as a waiver of  employee's  remedies,  Employee  does
hereby waive such remedies.

     14.Notices.  All  notices  hereunder  shall be in writing and shall be
deemed  effective  upon receipt,  if hand delivered or if sent by facsimile
and acknowledged  electronically and confirmed by an original  confirmation
copy  mailed  first  class  postage  prepaid.  Notices by mail  air-courier
service shall be deemed effective upon receipt, if sent first class postage
prepaid  return receipt  requested or by  air-courier  and the sender shall
obtain the signed  receipt  or  confirmation  of  delivery  by the  courier
service.  Otherwise,  notices shall be deemed effective as of the fifth day
after  transmission.  In each  case  notices  shall be  transmitted  to the
address  first given above or such other  address as may be given by notice
as provided herein.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first above written.


EMPLOYEE                              CLEAN DIESEL TECHNOLOGIES, INC.


   /s/ James M. Valentine                  /s/ Jeremy D. Peter-Hoblyn
- ------------------------------        -----------------------------------
James M. Valentine                      Jeremy D. Peter-Hoblyn, President



Date:    September 12, 1997           Date:  September 12, 1997
      ------------------------              -----------------------------





                                                                    Exhibit 12
                      CLEAN DIESEL TECHNOLOGIES, INC.
 STATEMENT RE: COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND
                         PREFERRED STOCK DIVIDENDS

(in thousands)
<TABLE>
<CAPTION>

                                  Years Ended December 31,                                   March 31,
               ---------------------------------------------------------             -------------------------
                                                                         Period                                   Period
                                                                           from                                     from
                                                                         January 1,                              January 1,
                                                                           1992                                    1992
                                                                         through                                  through
                                                                         December                                March 31,
                    1993     1994        1995        1996        1997    31, 1997          1997          1998      1998
               -----------------------------------------------------------------------------------------------------------
<S>                 <C>      <C>         <C>         <C>         <C>        <C>            <C>         <C>      <C>

Net loss(FN1)       $131     $1,107      $2,024      $3,489      $3,764     $10,853        $961        $741     $11,594
Interest            --           (1)        (99)        (60)        (44)       (204)        (14)        (11)       (218)
Interest
  portion of
  rental
  expenses          --         --          --            (5)         (5)        (10)         (1)         (1)        (11)
               -----------------------------------------------------------------------------------------------------------
Adjusted loss        131      1,106       1,925       3,424       3,715      10,639         946         729      11,365
COMPUTATION
  OF FIXED
  CHARGES
Interest            --            1          99          60          44         204          14          11         218
Interest
  portion of
  rental
  expenses          --         --          --             5           5          10           1           1          11
               -----------------------------------------------------------------------------------------------------------
Total fixed
  charges           --            1          99          65          49         214          15          12         229
               -----------------------------------------------------------------------------------------------------------
Deficiency in
  income to
  cover fixed
  charges           $131     $1,107      $2,024      $3,489      $3,764     $10,853        $961        $741     $11,594
               ===========================================================================================================

<CAPTION>
                  Pro Forma-Full         Pro Forma-Minimum
                   Subscription             Subscription
               ---------------------------------------------
               December     March      December     March
               31, 1997   31,  1998    31, 1997   31, 1998
               ---------------------------------------------
<S>              <C>          <C>      <C>         <C>

Net loss(FN1)    $3,764       $741     $3,764       $741
Interest
  expense           (44)       (11)       (44)       (11)
Interest
  portion of
  rental
  expenses           (5)        (1)        (5)        (1)
               ---------------------------------------------
Adjusted loss     3,715        729      3,715        729
COMPUTATION
  OF FIXED
  CHARGES
Interest
expense              44         11         44         11
Interest
  portion of
  rental
  expenses            5          1          5          1
Pro forma
  interest on        
  bridge loans(FN2)  --         --        140         35
Series A
  Preferred
  stock
  dividends(FN3)(4) 154         39         --         --
Series B
  preferred       
  stock
  dividends(FN3)(4) 408        102        220         55
               ---------------------------------------------
Total fixed
  charges           611        153        409        102
               ---------------------------------------------
Pro forma
  deficiency in
  income to
  cover
  combined
  fixed charges
  and preferred
  stock
  dividends      $4,326       $882     $4,124       $831
               =============================================

<FN>
(1) Net loss does not include any income tax benefit or expense in any
period.
(2) Assuming Minimum Subscription of the Rights Offering, assumes that the
Bridge  Loan notes do not convert  into  Series A Preferred  Stock and that
interest is payable  thereon at the rate of 10% per annum,  as if they were
outstanding as of the beginning of each respective period.
(3) Assumes that dividends will be paid in kind and, accordingly, dividend
rate is calculated at 11% per annum, as if the preferred stock was
outstanding as of the beginning of each respective period.
(4) The Preferred stock dividend requirement has not been adjusted for
income taxes due to operating losses and tax loss carryforwards.
</FN>
</TABLE>

                                                                   Exhibit 23a

                      Consent of Independent Auditors

We consent to the reference to our firm under the caption  "Experts" and to
the  use of  our  report  dated  February  26,  1998,  in the  Registration
Statement  (Form S-1 No.  333-___) and related  Prospectus  of Clean Diesel
Technologies, Inc. for the registration of Rights to purchase 50,000 shares
of Series B Convertible Preferred Stock and the registration of such Series
B Convertible  Preferred  Stock and the  registration  of 1,650,000  Common
Shares.

                                                  /s/ Ernst & Young LLP

Stamford, Connecticut

August 4, 1998


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