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 and Fuel Chem Technologies. 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 company was founded by Burr T. Walter in 1987 and is headquartered in Warrenville, IL.