Exhaust emission catalyst

Details Exhaust emission catalyst Exhaust emission catalyst

1982-08-05

1985-02-05

Thomas, Earl C.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

502330, B01D 5336

Patent

active

044977832

ABSTRACT:
An improved catalyst for the conversion of exhaust emissions from internal combustion engines comprises platinum on a refractory support and sodium or potassium or a combination of sodium and potassium in an amount sufficient to significantly broaden the A/F window for said catalyst. In place of sodium or potassium, barium may be used, although it is less effective than sodium or potassium. A preferred catalyst composition comprises platinum, palladium and rhodium on a refractory support and sodium or potassium in an amount sufficient to significantly broaden the A/F window of said catalyst.

REFERENCES:
patent: 3388077 (1968-06-01), Hoekstra
patent: 4369132 (1983-01-01), Kinoshita et al.

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