Exhaust gas cleaner and method for cleaning exhaust gas

Details Exhaust gas cleaner and method for cleaning exhaust gas Exhaust gas cleaner and method for cleaning exhaust gas

1995-05-18

1997-09-23

Caldarola, Glenn A.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502347, 502326, 4232391, 4232132, 4232135, 423224, 423234, B01J 2356

Patent

active

056704437

ABSTRACT:
An exhaust gas cleaner constituted by a first catalyst comprising a first porous inorganic oxide supporting an Ag component, a W component and a Pt component and optionally a second catalyst comprising a second porous inorganic oxide supporting a Pt component alone or in combination with a W component. The Ag component may include Ag and compounds thereof, the Pt component of the first and second catalysts may include Pt, Pd, Ru, Rh, Ir and Au, and the W component of the first and second catalysts may include W, V, Mn, Mo, Nb and Ta. The W component effectively catalyze the reduction of nitrogen oxides by ammonia to enhance the removal efficiency of the exhaust gas cleaner.

REFERENCES:
patent: 5075274 (1991-12-01), Kiyohide et al.
patent: 5320999 (1994-06-01), Muramatsu et al.
Database WPI Derwent Publications Ltd., London, GB; AN 92-402137 -Abstract.
Database WPI Derwent Publications Ltd., London, GB; AN 93-190875 -Abstract.

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