ZONED DIESEL OXIDATION CATALYST
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United States of America Patent
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Sep 29, 2016
app pub date -
Dec 2, 2013
filing date -
Dec 2, 2013
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Abstract
The present invention relates to a zoned diesel oxidation catalyst, wherein the first catalytically active zone and the second catalytically active zone have equal thermal masses, the first catalytically active zone and the second catalytically active zone each contain platinum and palladium as catalytically active constituents, the weight ratio of platinum to palladium in the first catalytically active zone and the second catalytically active zone is the same in each case or is greater in the first catalytically active zone than in the second catalytically active zone, and the total concentration of platinum and palladium in the first catalytically active zone is greater than in the second catalytically active zone.
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