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Catalysts, systems and methods to reduce NOX in an exhaust gas stream

United States Patent

July 20, 2010
View the Complete Patent at the US Patent & Trademark Office
Catalysts, systems and methods are described to reduce NO.sub.x emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having an SCR catalyst comprising silver tungstate on an alumina support. The emissions treatment system may be used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. An emissions treatment system may further comprise an injection device operative to dispense a hydrocarbon reducing agent upstream of the catalyst.
Castellano; Christopher R. (Ringoes, NJ), Moini; Ahmad (Princeton, NJ), Koermer; Gerald S. (Basking Ridge, NJ), Furbeck; Howard (Hamilton, NJ)
BASF Corporation (Florham Park, NJ)
11/ 533,631
September 20, 2006
GOVERNMENT CONTRACT RIGHTS The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of DE-FC26-02NT41218 awarded by the U.S. Department of Energy.