Process for purifying exhaust gases

Details Process for purifying exhaust gases Process for purifying exhaust gases

1997-05-29

1998-06-09

Bos, Steven

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

B01D 5394

Patent

active

057628920

ABSTRACT:
A catalyst for purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases at the stoichiometric point or in oxygen-rich atmosphere, is disclosed, and it includes a porous support, at least one noble metal catalyst ingredient loaded on the porous support, and selected from the group consisting of platinum, palladium and rhodium, and at least one NO.sub.X adsorbent loaded on the porous support, selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements, and having an average particle diameter falling in a range of from 0.1 to 20 micrometers. A process for purifying, by bringing the exhaust gases into contact with the catalyst, is also disclosed.

REFERENCES:
patent: 4806519 (1989-02-01), Chiba et al.
patent: 4965243 (1990-10-01), Yamada
patent: 5063192 (1991-11-01), Murakami et al.
patent: 5116800 (1992-05-01), Williamson et al.
patent: 5179059 (1993-01-01), Domesle
patent: 5402641 (1995-04-01), Katoh et al.
patent: 5496788 (1996-03-01), Domesle et al.

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