Smart cleaner device burns fuel with almost zero emissions

Georgia Tech researchers have created a new combustor (combustion chamber where fuel is burned to power an engine or gas turbine) designed to burn fuel in a wide range of devices with next to no emission of nitrogen oxide (NOx) and carbon monoxide (CO), two of the primary causes of air pollution.

The device, originally developed for NASA, has a simpler design than existing state-of-the-art combustors and could be manufactured and maintained at a much lower cost, making it more affordable in everything from jet engines and power plants to home water heaters.

“We must burn fuel to power aircrafts and generate electricity for our homes. The combustion community is working very hard to find ways to burn the fuel completely and derive all of its energy while minimizing emissions,” said Dr. Ben Zinn, Regents’ professor, the David S. Lewis Jr. Chair in Georgia Tech’s Guggenheim School of Aerospace Engineering and a key collaborator on the project. “Our combustor has an unbelievably simple design, and it would be inexpensive to make and inexpensive to maintain.”

Called the Stagnation Point Reverse Flow Combustor, the Georgia Tech device, originally developed for NASA, significantly reduces NOx and CO emissions in a variety of aircraft engines and gas turbines that burn gaseous or liquid fuels. It burns fuel with NOx emissions below 1 parts per million (ppm) and CO emissions lower than 10 ppm, significantly lower than emissions produced by other combustors.

Georgia Tech’s design eliminates the complexity associated with premixing the fuel and air by injecting the fuel and air separately into the combustor while its shape forces them to mix with one another and with combustion products before ignition occurs.

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Walter Derzko

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