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NOx reduction in combustion with concentrated coal streams and oxygen injection

United States Patent

March 2, 2004
View the Complete Patent at the US Patent & Trademark Office
NOx formation in the combustion of solid hydrocarbonaceous fuel such as coal is reduced by obtaining, from the incoming feed stream of fuel solids and air, a stream having a ratio of fuel solids to air that is higher than that of the feed steam, and injecting the thus obtained stream and a small amount of oxygen to a burner where the fuel solids are combusted.
Kobayashi; Hisashi (Putnam Valley, NY), Bool, III; Lawrence E. (East Aurora, NY), Snyder; William J. (Ossining, NY)
Praxair Technology, Inc. (Danbury, CT)
10/ 194,828
July 11, 2002
This invention was made with United States Government support under Cooperative Agreement No. DE-FC26-00NT40756 awarded by the Department of Energy. The United States Government has certain rights in the invention.