Process for removing nitrogen oxides from exhaust gases

Details Process for removing nitrogen oxides from exhaust gases Process for removing nitrogen oxides from exhaust gases

1991-12-31

1993-07-13

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423212, B01J 800, C01B 2100, B01D 4700

Patent

active

052271455

ABSTRACT:
A process for removing nitrogen oxides from an exhaust gas by bringing the exhaust gas containing nitrogen oxides into contact with at least one catalyst selected from a polyvalent metal phosphate, a polyvalent metal sulfate or an aluminate of a transition metal of the 4th period of the Periodic Table in an oxidizing atmosphere containing excess oxygen and in the presence of a hydrocarbon or an oxygen containing organic compound. There is also disclosed a process for removing nitrogen oxides from an exhaust gas which comprises bringing the exhaust gas into contact with the above catalyst and then with an oxidation catalyst.

REFERENCES:
patent: 3382033 (1968-05-01), Kitagawa
patent: 4119568 (1978-10-01), Nishida et al.
patent: 4950139 (1990-08-01), Fennemann et al.
Derwent Abstract of JP2211224, 1989.
Derwent Abstract of JP58156349, 1982.

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