Method for catalytically purifying exhaust gas

Details Method for catalytically purifying exhaust gas Method for catalytically purifying exhaust gas

1991-11-27

1994-03-15

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232135, B01J 800, C01B 2100, C01B 2300

Patent

active

052944212

ABSTRACT:
A method for purifying an oxygen excess exhaust gas by catalytically reducing nitrogen oxides contained in the exhaust gas, which comprises bringing a catalyst comprising at least one noble metal supported on a carrier composed mainly of an oxide or a complex oxide of at least one metal selected from rare earth metals and metals of the group IV A of the periodic table of elements into contact the exhaust gas.

REFERENCES:
patent: 3346328 (1967-10-01), Sergeys et al.
patent: 3741725 (1973-06-01), Graham
patent: 4297328 (1981-10-01), Ritscher et al.
patent: 4407785 (1983-10-01), Pfefferle
patent: 4867954 (1989-09-01), Staniulis et al.
patent: 4950461 (1990-08-01), Schwetje et al.

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