CPC B01J 35/04 (2013.01) [B01D 53/944 (2013.01); B01D 53/9472 (2013.01); B01J 23/10 (2013.01); B01J 23/626 (2013.01); B01J 23/6562 (2013.01); B01J 29/46 (2013.01); B01J 29/7015 (2013.01); B01J 29/80 (2013.01); B01J 35/0006 (2013.01); B01J 37/038 (2013.01); F01N 3/0222 (2013.01); F01N 3/103 (2013.01); F01N 3/2066 (2013.01); F01N 3/2803 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2094 (2013.01); B01D 2255/502 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9022 (2013.01); B01D 2255/9155 (2013.01); F01N 2370/04 (2013.01); F01N 2610/02 (2013.01); F01N 2610/1453 (2013.01)] | 25 Claims |
1. A low temperature carbon monoxide (LT-CO) oxidation catalyst composition for abatement of exhaust gas emissions from a lean burn engine, the LT-CO oxidation catalyst composition comprising:
an oxygen storage component (OSC) comprising ceria; a first platinum group metal (PGM) component selected from palladium (Pd), platinum (Pt), and combinations thereof; and
a first promoter metal selected from tin (Sn) or an oxide thereof;
wherein the OSC is impregnated with the first PGM component and the first promoter metal;
wherein the first promoter metal is present in an amount ranging from about 1% by weight to about 4% by weight of the OSC alone, calculated on a metal oxide basis; and
wherein the LT-CO oxidation catalyst composition is effective for oxidizing carbon monoxide and hydrocarbons under cold start conditions.
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