Exhaust gas conversion process and catalyst

Details Exhaust gas conversion process and catalyst Exhaust gas conversion process and catalyst

1977-03-07

1978-05-23

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

23288F, 252432, 252460, 252466B, 252472, 252477R, B01D 5334

Patent

active

040910725

ABSTRACT:
A multi-catalyst system is provided which is effective for the conversion of nitrogen oxides, carbon monoxide and hydrocarbons in near stoichiometric engine exhaust gases in a single conversion zone to which no additional air is admitted. The system comprises at least two separate but contiguous components. The first component comprises a porous inert support having dispersed thereon rhodium plus nickel and/or cobalt, and is essentially free of platinum and palladium. The second component comprises a porous inert support having dispersed thereon platinum and/or palladium, with or without nickel and/or cobalt, and is essentially free of rhodium.

REFERENCES:
patent: 3370914 (1968-02-01), Gross et al.
patent: 3886260 (1975-05-01), Unland
patent: 3910770 (1975-10-01), Kobylinski et al.
patent: 3929965 (1975-12-01), Kim et al.
patent: 3960510 (1976-06-01), Sergeys

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