Pt-Pd diesel oxidation catalyst with CO/HC light-off and HC storage function
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United States of America Patent
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Jan 25, 2011
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Jun 24, 2009
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Jun 9, 2006
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Abstract
The present invention is directed to a diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx). More particularly, the present invention is directed to a novel washcoat composition comprising two distinct washcoat layers containing two distinctly different ratios of Pt:Pd.
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