Exhaust gas purifying method and catalyst used therefor

Details Exhaust gas purifying method and catalyst used therefor Exhaust gas purifying method and catalyst used therefor

1996-04-29

2000-04-04

Griffin, Steven P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

502304, 502328, B01D 5394

Patent

active

060457643

ABSTRACT:
An exhaust gas purifying catalyst is provided for purifying NOx contained in an exhaust gas from an internal combustion engine of a vehicle operated at a high air fuel ratio due to excessive oxygen, using unburnt HC or CO in the exhaust gas as a reducing agent. The catalyst comprises platinum, strontium and a rare earth metal, as active components, each supported on a support of inorganic oxide. The active components of the catalyst include platinum of 0.01-3.7 by wt ratio, strontium of 0.01-55 by wt ratio and a rare earth metal of 0.01-36 wt ratio, per the inorganic oxide of 100 by wt ratio.

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patent: 5547913 (1996-08-01), Muramoto

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