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Oxidation catalysts comprising metal exchanged hexaaluminate wherein the metal is Sr, Pd, La, and/or Mn

United States Patent

October 28, 2008
View the Complete Patent at the US Patent & Trademark Office
The present invention provides metal-exchanged hexaaluminate catalysts that exhibit good catalytic activity and/or stability at high temperatures for extended periods with retention of activity as combustion catalysts, and more generally as oxidation catalysts, that make them eminently suitable for use in methane combustion, particularly for use in natural gas fired gas turbines. The hexaaluminate catalysts of this invention are of particular interest for methane combustion processes for minimization of the generation of undesired levels (less than about 10 ppm) of NOx species. Metal exchanged hexaaluminate oxidation catalysts are also useful for oxidation of volatile organic compounds (VOC), particularly hydrocarbons. Metal exchanged hexaaluminate oxidation catalysts are further useful for partial oxidation, particularly at high temperatures, of reduced species, particularly hydrocarbons (alkanes and alkenes).
Wickham; David (Boulder, CO), Cook; Ronald (Lakewood, CO)
TDA Research, Inc. (Wheat Ridge, CO)
10/ 382,132
March 5, 2003
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with Government support under contract #DE-FG03-99ER82902 awarded by the United States Department of Energy. The government has certain rights in the invention.