in an exhaust gas stream and methods of preparation
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United States of America Patent
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May 17, 2011
Grant Date -
Mar 20, 2008
app pub date -
Sep 20, 2006
filing date -
Sep 20, 2006
priority date (Note) -
Expired
status (Latency Note)
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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 a catalyst comprising silver and a platinum group metal on a particulate alumina support, the atomic fraction of the platinum group metal being less than or equal to about 0.25. Methods of manufacturing catalysts are described in which silver is impregnated on alumina particles.
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