Catalyst systems for the reduction of the oxides of nitrogen

Details Catalyst systems for the reduction of the oxides of nitrogen Catalyst systems for the reduction of the oxides of nitrogen

1972-04-12

1978-02-28

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

252466PT, B01D 5300

Patent

active

040767922

ABSTRACT:
Devices and processes are disclosed for the treatment of waste gases, particularly automotive exhaust gases, to remove the oxides of nitrogen therefrom. Mixed noble metal catalysts consisting essentially of platinum or palladium and at least one other noble metal selected from the group consisting of ruthenium, rhodium, and iridium are employed in combination with layered oxide support coatings to eliminate ammonia formation during the removal process.

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patent: 3118727 (1964-01-01), Cohn et al.
patent: 3397034 (1968-08-01), Tulleners et al.
patent: 3433581 (1969-03-01), Stephens et al.
patent: 3554929 (1971-01-01), Aarons
patent: 3565830 (1971-02-01), Keith et al.
patent: 3637344 (1971-01-01), Thompson
patent: 3784675 (1974-01-01), Kobylinski et al.

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