Hydrogen sulfide-suppressing catalyst system

Details Hydrogen sulfide-suppressing catalyst system Hydrogen sulfide-suppressing catalyst system

1992-06-15

1993-03-23

Shine, W. J.

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

Catalyst or precursor therefor

Silicon containing or process of making

502302, 502303, 502304, 502324, 502326, 502327, 4232135, B01J 2104, B01J 2106, B01J 2310, B01J 2364, B01J 2389

Patent

active

051963906

ABSTRACT:
H.sub.2 S formation by three-way catalyst is suppressed by incorporating nickel, manganese or iron oxides into an undercoat layer disposed on a substrate, such as a monolith substrate. A topcoat overlying the undercoat is comprised of a three-way catalyst material which includes one or more of platinum, rhodium and palladium as catalytic metals.

REFERENCES:
patent: 3397154 (1968-08-01), Talsma
patent: 3947380 (1976-03-01), Whelan
patent: 3993572 (1976-11-01), Hindin
patent: 4171287 (1979-10-01), Keith
patent: 4552733 (1985-11-01), Thompson et al.
patent: 4780447 (1988-10-01), Kim et al.
patent: 4868148 (1989-09-01), Henk et al.
patent: 4923842 (1990-05-01), Summers

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