 WARRENVILLE, Ill.--BUSINESS WIRE--Fuel Tech, Inc. NASDAQ: FTEK, a technology company providing advanced engineering solutions for the optimization of combustion systems, emissions control, and water treatment in utility and industrial applications, today reported financial results for the second quarter ended June 30, 2021 Q2 2021. Our Q2 2021 revenues rose 18.6 from the second quarter of 2020 Q2 2020, driven by a 72 revenue improvement for the FUEL CHEM segment attributable to 