Catalytic method for selectively reducing nitrogen oxides

Details Catalytic method for selectively reducing nitrogen oxides Catalytic method for selectively reducing nitrogen oxides

1997-03-14

1998-09-22

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232135, 4234372, 502 85, B01D 5356, B01J 3708

Patent

active

058110674

ABSTRACT:
A method for the catalytic removal of nitrogen oxides, methane and carbon monoxide out of oxygen-rich exhaust gases emitted from motors that may combust natural gas by contacting the exhaust gas with a zeolite of the NFI structure that contains palladium. The palladium containing zeolite has been activated under oxygen prior to use by calcining the palladium containing zeolite at about 300.degree. C. for about one hour, then calcining the palladium containing zeolite at about 500.degree. C. for about one hour, and cooling the palladium containing zeolite to about 300.degree. C.

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