Fuel Tech, Inc. engages in the development, commercialization, and application of proprietary technologies for air pollution control, process optimization, combustion efficiency, and advanced engineering services. It operates through the following segments: Air Pollution Control and Fuel Chem. The Air Pollution Control segment includes technologies to reduce nitrogen oxides emissions in flue gas from boilers, incinerators, furnaces, and other stationary combustion sources. The Fuel Chem 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 company was founded by Burr T. Walter in 1987 and is headquartered in Warrenville, IL.