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Oxygen enhanced switching to combustion of lower rank fuels

United States Patent

March 2, 2004
View the Complete Patent at the US Patent & Trademark Office
A furnace that combusts fuel, such as coal, of a given minimum energy content to obtain a stated minimum amount of energy per unit of time is enabled to combust fuel having a lower energy content, while still obtaining at least the stated minimum energy generation rate, by replacing a small amount of the combustion air fed to the furnace by oxygen. The replacement of oxygen for combustion air also provides reduction in the generation of NOx.
Kobayashi; Hisashi (Putnam Valley, NY), Bool, III; Lawrence E. (East Aurora, NY), Wu; Kuang Tsai (Williamsville, NY)
Praxair Technology, Inc. (Danbury, CT)
10/ 194,574
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.