Oxidation Catalyst and Exhaust-Gas Purification System Using the Same
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United States of America Patent
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Issued Date -
May 29, 2008
app pub date -
Nov 28, 2007
filing date -
Nov 29, 2006
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Abstract
An oxidation catalyst that efficiently promotes oxidation of NO to NO.sub.2 even in a low temperature range, and an exhaust-gas purification system and method that efficiently removes exhaust-gas components even in a low temperature range are provided. This invention provides an oxidation catalyst comprising platinum and palladium as catalytically active components, which promotes oxidation of nitrogen monoxide to nitrogen dioxide, wherein the oxidation catalyst comprises 1 to 55% by weight of the palladium relative to 100% by weight of the platinum.
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