Fuel Tech Inc (FTEK) is an integrated technology company that specializes in the development, commercialization, and application of proprietary technologies for air pollution control, process optimization, combustion efficiency, and advanced engineering services. The company’s product portfolio includes carbonic acid generation technology; dissolved gas infusion; customized NOx control systems; particulate Matter control systems; electrostatic preceptors; flue gas conditioning; NOx burners and upgrades; over fire air systems; rich reagent injections; static mixtures; graduated straightening grid; ammonia injection grid; SCR services; urea reagent; integrated NOx reduction system; targeted in-fuel injection, among others. It also offers services such as advanced process modeling; chemical kinetics modeling; experimental modeling; combustion testing; aftermarket services; and boiler testing and monitoring services. The company also offers water treatment technologies and advanced engineering services. Fuel Tech operates offices in Durham, North Carolina, Stamford, Connecticut, and Westlake, Ohio. The company also operates international offices in Gallarate, Italy, and Beijing, China.

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FTEK has been focusing its research and development (R&D) efforts on new product development, particularly in pursuing commercial applications for technologies outside of its traditional markets. The company has been developing and analyzing new technologies that could represent incremental market opportunities. The company is also focused on finding new water treatment technologies such as the dissolved gas infusion systems. The company has also expanded its focus on R&D of new technologies for air pollution control, fuel and boiler treatment chemicals, computer modeling, and advanced visualization technologies. As of December 2024, the company had 36 granted patents worldwide including 13 US patents and 23 non-US patents. It also had five pending patent applications: two in the U.S. and three in non-U.S. jurisdictions. These patents and applications cover 41 inventions, 24 associated with the NOx reduction business, eight associated with the FUEL CHEM business, and nine associated with water treatment. In FY2024, the company spent US$1.5 million on R&D, which as a percentage of revenue, stood at 6.2%.