Catalysts for controlling auto exhaust emissions including hydro

Details Catalysts for controlling auto exhaust emissions including hydro Catalysts for controlling auto exhaust emissions including hydro

1987-07-10

1988-10-25

Shine, W. J.

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

Catalyst or precursor therefor

Silicon containing or process of making

502303, 502304, 4232135, B01J 2310, B01J 2358, B01J 2389

Patent

active

047804475

ABSTRACT:
A catalyst, which is capable of controlling not only HC, CO and NOx, but also H.sub.2 S emission from the tail pipe of catalytic converter-equipped automobiles, is made of noble metals promoted with ceria-rich rare earth oxides, preferably doubly promoted along with alkali metal oxides, and oxides of nickel and/or iron as an H.sub.2 S gettering ingredient. The oxides of nickel and/or iron are present in an H.sub.2 S gettering effective amount and in an amount up to 10 wt %. The alumina support can have additionally from 0 to 20% SiO.sub.2 present.

REFERENCES:
patent: 4171287 (1979-10-01), Keith
patent: 4591580 (1986-05-01), Kim et al.
patent: 4738947 (1988-04-01), Wan et al.

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