Vanadium-free diesel oxidation catalyst and method for its production
AssigneeClariant Produkte (Deutschland) GmbH
InventorsAndreas Bentele, Klaus Wanninger, Gerd Maletz, Martin Schneider
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Abstract
The invention relates to a method for producing a catalytic composition, wherein the catalytic composition has a high activity and selectivity with regard to the oxidation of CO and a reduced activity with regard to the oxidation of NO. The invention also relates to the catalyst produced using the method according to the invention. Finally, the invention is directed towards an exhaust-gas cleaning system which comprises the catalyst according to the invention.
Claims14
A method for producing a catalyst, comprising the steps:
- a) impregnating a metal oxide support material with a platinum compound,
- b) drying the impregnated metal oxide support material obtained in step a) at a temperature of from 60 to 100° C.,
- c) applying the dried, impregnated metal oxide support material obtained in step b) as a washcoat coating to a catalyst support body which is then dried at a temperature of from 60 to 100° C., and
- d) calcining the dried catalyst support body obtained in step c) that has not undergone any prior calcining, in a gas stream which consists of CO and inert gas.
A method for producing a catalyst, consisting of the steps of:
- a) impregnating a metal oxide support material with a platinum compound,
- b) drying the impregnated metal oxide support material obtained in step a) at a temperature of from 60 to 100° C.,
- c) applying the dried, impregnated metal oxide support material obtained in step b) as in the form of a washcoat coating to a catalyst support body which is then dried at a temperature of from 60 to 100° C., and
- d) calcining the dried catalyst support body obtained in step c) in a gas stream which consists of CO and inert gas.
Dependencies are inferred from the claim text.