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US 9,034,269 B2Granted
Diesel oxidation catalyst comprising palladium, gold and ceria
AssigneeBASF SE
InventorsMarcus Hilgendorff, Alfred H. Punke, Torsten W. Müller-Stach, Gerd Grubert, Torsten Neubauer, Jeffrey B. Hoke
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Abstract
The present invention relates to a diesel oxidation catalyst comprising a carrier substrate, and a first washcoat layer disposed on the substrate, the first washcoat layer comprising palladium supported on a support material comprising a metal oxide, gold supported on a support material comprising a metal oxide, and a ceria comprising compound, as well as a process for the preparation of such catalyst.
Claims21
A diesel oxidation catalyst comprising:
- a carrier substrate, and
- a first washcoat layer disposed on the substrate, the first washcoat layer comprising palladium supported on a support material comprising a metal oxide, gold supported on a support material comprising a metal oxide, and a ceria comprising compound,
- wherein the first washcoat layer comprises palladium in an amount of from 0.1 to 200 g/ft3, gold in an amount of from 0.1 to 100 g/ft3, and ceria, contained in the ceria comprising compound, in an amount of from 0.001 to 10 g/inch3.
A diesel oxidation catalyst comprising:
- a carrier substrate, and
- a first washcoat layer disposed on the substrate, the first washcoat layer comprising palladium supported on a support material comprising a metal oxide, gold supported on a support material comprising a metal oxide, and ceria comprising compound,
- wherein the first washcoat layer comprises at most 0.1 wt-% platinum, calculated as element and based on the weight of the first washcoat layer, at most 0.1 wt-% zeolite, based on the weight of the washcoat layer, and at most 1 wt-% barium, calculated as barium oxide and based on the weight of the first washcoat layer.
Dependencies are inferred from the claim text.