Catalysts, systems and methods to reduce NOX in an exhaust gas stream
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United States of America Patent
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Jul 20, 2010
Grant Date -
Mar 20, 2008
app pub date -
Sep 20, 2006
filing date -
Sep 20, 2006
priority date (Note) -
Expired
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Abstract
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.
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