Catalysts for the purification of exhaust gas

Details Catalysts for the purification of exhaust gas Catalysts for the purification of exhaust gas

1996-04-10

1997-10-28

Lewis, Michael

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 64, 502 66, 502 71, 502 73, 502 74, 502 77, 4232135, 4232392, B01J 2906

Patent

active

056817886

ABSTRACT:
A catalyst for the purification of exhaust gas comprises a first coat layer of a palladium-carried activated alumina containing Ce, Zr and La formed on a honeycomb carrier, a second coat layer of an activated alumina containing Ce, Zr and La formed on the first coat layer, and a third coat layer of copper ion-exchanged zeolite powder formed on the second coat layer and efficiently purifies NOx, HC and CO in the exhaust gas under conditions from theoretical air-fuel ratio to excessive oxygen atmosphere.

REFERENCES:
patent: 5376610 (1994-12-01), Takahata et al.
patent: 5427989 (1995-06-01), Kanesaka et al.
Translation of '044 reference.

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