Diesel oxidation catalyst articles and methods of making and using
AssigneeBASF SE
InventorsXinyi Wei, Stanley A. Roth
Life of this patent
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Abstract
Diesel oxidation catalysts, catalytic articles, methods of making catalytic articles, emissions treatment systems and methods of treating an exhaust gas stream using the catalytic articles for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC) and carbon monoxide (CO) are described. Specific catalytic articles comprising a substrate with a first washcoat layer comprising greater than or equal to about 2% by weight palladium dispersed on a ceria support and a second washcoat layer comprising a platinum group metal and a refractory metal oxide are described.
Claims13
A catalytic article for treating an exhaust gas stream containing hydrocarbons, CO and particulate matter, the article comprising:
- a substrate having an inlet end and an outlet end defining an axial length;
- a first washcoat layer on the substrate comprising greater than or equal to about 2% by weight palladium dispersed on a pure ceria support;
- and
- a second washcoat layer on the first washcoat layer, the second washcoat layer comprising a platinum group metal and a refractory metal oxide.
Dependencies are inferred from the claim text.