Exhaust gas cleaner and method of cleaning exhaust gas

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

1992-12-18

1994-06-14

Sneed, Helen M. S.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502304, B01J 2310, B01J 2358, B01J 2378, B01J 2334

Patent

active

053209990

ABSTRACT:
An exhaust gas containing nitrogen oxides and particulate matter is cleaned by using an exhaust gas cleaner including a heat-resistant, porous filter; a porous ceramic powder layer formed on the filter; and a catalyst supported by the ceramic powder layer, the catalyst consisting essentially of (a) at least one of alkali metal elements, (b) cobalt and/or manganese, (c) vanadium, and (d) at least one of rare earth elements, whereby the nitrogen oxides are reduced by the particulate matter in the exhaust gas serving as a reducing agent.

REFERENCES:
patent: 3896048 (1975-07-01), Mehalchick et al.
patent: 4485191 (1984-11-01), Sekido et al.
patent: 5041270 (1991-08-01), Fujitani et al.
patent: 5059575 (1991-10-01), Jorgensen et al.
patent: 5075274 (1991-12-01), Kiyohide et al.
patent: 5108977 (1992-04-01), Yoshida et al.
patent: 5141714 (1992-08-01), Obuchi et al.

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