Process for reducing nitrogen oxides from exhaust gas

Details Process for reducing nitrogen oxides from exhaust gas Process for reducing nitrogen oxides from exhaust gas

1990-08-31

1993-12-14

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232135, 4232392, 423247, B01J 806, B01D 5336

Patent

active

052700240

ABSTRACT:
A catalyst for reducing nitrogen oxides from an exhaust gas containing the same in an oxygen rich atmosphere comprising (i) a zeolite having a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of at least 10, (ii) copper, and (iii) a rare earth ion, an alkaline earth metal and/or a valence variable metal.

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