Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1983-01-28
1984-05-15
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
4232135, 502339, B01J 2342, B01J 2344, B01J 2346, B01D 5336
Patent
active
044487568
ABSTRACT:
This specification discloses a process for treatment of exhaust gases from an internal combustion engine. The process has the following general steps. A hydrocarbon fuel is burned in an internal combustion engine to generate exhaust gases containing various amounts of hydrocarbons, carbon monoxide, and oxides of nitrogen. The generated exhaust gases are passed over an improved catalyst system characterized as follows. The catalyst system has a support medium for supporting the same. The support medium has both an upstream support portion over which exhaust gases initially flow and a downstream support portion over which exhaust gases flow after passing over the upstream support portion thereof. Finely divided palladium is dispersed by itself on the upstream support portion of the support medium. The downstream support portion of the support medium has a platinum/rhodium three-way catalyst thereon.
REFERENCES:
patent: 2956865 (1960-10-01), Williams, Sr.
patent: 3180712 (1965-04-01), Hamblin
patent: 3503715 (1970-03-01), Haensel
patent: 3896616 (1975-07-01), Keith et al.
patent: 4118199 (1978-10-01), Volker et al.
patent: 4225561 (1980-09-01), Torres
Hammerle Robert H.
Wu Ching-Hsong
Ford Motor Company
Johnson Olin B.
Johnson William E.
Russel Jeffrey E.
Thomas Earl C.
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