Fuel Tech, Inc. engages in the development, commercialization and application of proprietary technologies for air pollution control, process optimization, water treatment, and advanced engineering services. It operates through the following segments: Air Pollution Control, Fuel Chem Technologies, and Other. The Air Pollution Control Technology segment includes technologies to reduce nitrogen oxides emissions in flue gas from boilers, incinerators, furnaces, and other stationary combustion sources. The Fuel Chem Technology segment uses chemical processes in combination with computational fluid dynamics, and chemical kinetics modeling boiler modeling, for the control of slagging, fouling, corrosion, opacity, and other sulfur trioxide-related issues in furnaces, and boilers. The Other segment includes those profit and loss items not allocated to either reportable segment. The company was founded by Burr T. Walter in 1987 and is headquartered in Warrenville, IL.