JPMORGAN CHASE BANK, N.A. SIXTH AMENDMENT TO CREDIT AGREEMENT

THIS SIXTH AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is dated as of June 30, 2015 and is by and between FUEL TECH INC., a Delaware corporation (the “Borrower”), the Loan Parties party hereto, and JPMORGAN CHASE BANK, N.A., a national banking association (“Lender”).

WHEREAS, Lender and the Loan Parties are parties to a Credit Agreement dated as of June 30, 2009 (as amended from time to time, the “Credit Agreement”). The Credit Agreement evidences certain credit facilities pursuant to which the Lender has made certain revolving loans to the Loan Parties on the terms and conditions set forth therein. The Loan Parties’ obligations under the Credit Agreement were originally evidenced by that certain Promissory Note executed by Borrower in the original principal amount of $25,000,000.00 dated June 30, 2009 (the “Note”); and

WHEREAS, pursuant to the First Amendment to Credit Agreement dated October 5, 2009, the parties corrected a scrivener's error which had occurred in Section 6.14 (b) (“Leverage Ratio”) of the Credit Agreement;

WHEREAS, pursuant to the Second Amendment to the Credit Agreement dated November 4, 2009, the Lender waived a default of the covenant set forth in Section 6.14(a) of the Agreement, amended the Minimum Net Income covenant, amended the Leverage Ratio, and amended the definitions of “Permitted Acquisitions” and “Applicable Rate”;

WHEREAS, pursuant to the Third Amendment to the Credit Agreement dated June 30, 2011, the Lender renewed and reduced the revolving credit facility evidenced by the Note to $15,000,000.00 and adjusted the Tangible Net Worth Covenant;

WHEREAS, pursuant to the Fourth Amendment to the Credit Agreement dated June 30, 2014, the Lender extended the maturity date of the revolving credit facility evidenced by the Note to June 30, 2015 and also amended the financial covenants set forth at Sections 6.14(b) (“Leverage Ratio”) and 6.14(c) (“Minimum Tangible Net Worth”) of the Credit Agreement;

WHEREAS, pursuant to the Fifth Amendment to the Credit Agreement, Lender made further adjustments to Section 6.14(c) of the Credit Agreement (“Minimum Tangible Net Worth”); and

WHEREAS, the Borrower has now requested that Lender, among other things, renew the Revolving Credit Facility and extend same until June 30, 2017, that pricing be changed on that Facility, and that certain financial covenant violations be waived, and the covenants restated. The Lender is willing to accommodate Borrower’s requests on the terms and conditions set forth herein.

NOW THEREFORE, for good and valuable consideration, the receipt and adequacy of which is hereby acknowledged, the parties agree as follows:

1.The parties acknowledge the accuracy of the foregoing recitals. All capitalized terms used herein without specific definitions should be accorded the meanings set forth for such terms in the Credit Agreement.

2.    From and after the date hereof, the definition of “Applicable Rate” shall be amended to hereafter provide as follows:

“‘Applicable Rate’ means, for any day, with respect to any CBFR Loan or Eurodollar Revolving Loan, or with respect to the commitment fees or letter of credit fees payable hereunder, as the case may be, the applicable rate per annum set forth below under the caption ‘CBFR Spread,’ ‘Eurodollar Spread,’ ‘Commitment Fee Rate,’ or ‘Letter of Credit Rate’ as the case may be:

3.    From and after the date hereof, the definition of “Maturity Date” shall be amended to hereafter provide as follows:

“‘Maturity Date’ means June 30, 2017 or any earlier date on which the Commitment is reduced to zero (0) or otherwise terminated pursuant to the terms hereof.”

4.    From and after the date hereof, the existing Section 6.14(b) of the Credit Agreement (“Leverage Ratio”) is deleted from the Agreement. Hereafter, Section 6.14(b) shall provide as follows:

“(b)    Minimum EBITDA. The Borrower shall have, at the end of each fiscal quarter hereafter, starting with the quarter ending December 31, 2015, an EBITDA for the twelve-month period then-ended of not less than $500,000.00. Beginning with the fiscal quarter ending June 30, 2016, Borrower shall have an EBITDA at the end of each fiscal quarter for the twelve-month period then-ended of not less than $1,000,000.00.”

5.    From and after the date hereof, Section 6.14(c) of the Credit Agreement (“Minimum Tangible Net Worth”) is deleted from the Agreement and is replaced with the following provision:

“(c)    Minimum Shareholder Equity. Borrower’s total assets minus total liabilities as determined by GAAP, consistently applied, shall not be less than $69,000,000.00 at any measurement period from December 31, 2015 until December 30, 2016. Beginning as of December 31, 2016, Borrower’s Minimum Shareholder Equity shall be not less than $70,000,000.00 at all times.”

6.    Section 6.13 of the Credit Agreement (“Capital Expenditures”) is hereby amended by deleting the number “$10,000,000.00” from said section, and replacing same with the number “$5,000,000.00.”

7.    Lender hereby waives any violations of the Financial Covenants set forth at Sections 6.14(b) and 6.14(c) of the Credit Agreement for the period ending as of March 31, 2015. This waiver is limited to such covenant violations, and does not extend any other term or provision of the Credit Agreement, all of which terms and provisions remain in full force and effect except as amended herein. The within waiver does not create a custom or course of dealings between the parties.

8.    The obligation of the Lender to amend the Agreement as herein above set forth and the effectiveness of this Amendment, is subject to satisfaction of the following conditions precedent:

9.    Within sixty (60) days of the date hereof, Borrower will cause Loan Guarantor Fuel Tech S.r.1. to provide evidence of its good standing, a resolution reaffirming its guaranty of the Guaranteed Obligations, and an identification of all individuals (with sample signatures and indication of office) authorized to act on behalf of Loan Guarantor in connection with the Credit Agreement and the Loan Guaranty.

10.    This Amendment shall be binding upon and inure to the benefit of the successors and assigns of the Borrower, Loan Parties and the Lender.

11.    Except as expressly amended hereby, the Credit Agreement shall remain in full force and effect. The Credit Agreement and all rights and powers created thereby are in all respects ratified and confirmed.

12.    This Amendment has been duly authorized, executed and delivered on behalf of the Borrower and Loan Parties pursuant to all requisite corporate authority, and the Credit Agreement as amended hereby constitutes the legal, valid and binding obligation of the Borrower and Loan Parties, enforceable in accordance with its terms, except as enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws relating to creditor’s rights.

13.    Borrower hereby certifies, represents and warrants to Lender that all certifications, representations and warranties made by Borrower to Lender in or in connection with the Credit Agreement were true in all material respects as of the date of the Credit Agreement and are true in all material respects on and as of the date hereof as if made on and as of the date hereof.

14.    Borrower and the Loan Parties hereby acknowledge and agree that they have no defenses, offsets or counterclaims to the payment of principal, interest, fees or other liabilities owing under the Credit Agreement and they hereby waive and relinquish any such defenses, offsets or counterclaims and Borrower and the Loan Parties hereby release Lender and its respective officers, directors, agents, affiliates, successors and assigns from any claim, demand or cause of action, known or unknown, contingent or liquidated, which may exist or hereafter be known to exist relating to any matter prior to the date hereof.

15.    Except as otherwise specified herein, this Amendment embodies the entire agreement and understanding between Lender and Borrower with respect to the subject matter hereof and supersedes all prior agreements, consents and understandings relating to such subject matter.

16.    This Amendment may be signed in any number of counterparts, each of which shall be deemed to be an original, but all of which together shall constitute one and the same instrument.

17.    This Amendment is governed and controlled by the laws of the state of Illinois.

IN WITNESS WHEREOF, this Amendment has been duly executed as of the date and year specified at the beginning hereof.