Exhaust gas cleaning catalyst with an axially varying...

Details Exhaust gas cleaning catalyst with an axially varying... Exhaust gas cleaning catalyst with an axially varying...

2011-03-15

2011-03-15

Nguyen, Cam N (Department: 1736)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S326000, C502S332000, C502S333000, C502S334000, C502S339000, C502S439000, C422S177000, C422S180000, C428S593000

Reexamination Certificate

active

07906454

ABSTRACT:
The present invention relates to an exhaust gas cleaning catalyst comprising on a honeycomb carrier a catalytic coating. Said honeycomb carrier has an upstream end and a downstream end and a plurality of flow channels are running from the upstream end to the downstream end. The catalytic coating comprises catalytically active precious metal components of which at least one component exhibits a concentration profile along the honeycomb carrier starting with a low concentration at the upstream end which increases along the flow channels up to a maximum value and then decreases again to the downstream end.

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Written Opinion.

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