Method of cleaning exhaust gas

Details Method of cleaning exhaust gas Method of cleaning exhaust gas

1992-05-29

1994-03-01

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232132, 4232155, B01J 800, B01J 802, C01B 2100, C01B 2300

Patent

active

052905306

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: 5075274 (1991-12-01), Kiyohide et al.
patent: 5154901 (1992-10-01), Yoshida et al.
patent: 5213781 (1993-05-01), Abe et al.

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