Method for the reduction of nitrogen oxide

Details Method for the reduction of nitrogen oxide Method for the reduction of nitrogen oxide

1989-09-06

1990-11-27

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423239, 423392, C01B 2100, C01B 2138, C01B 2144, B01J 800

Patent

active

049734571

ABSTRACT:
The present invention relates to a method of reduction of nitrogen oxides in gas mixtures, especially the removal/decomposition of nitrogen oxide in hot combustion gases. The hot gas mixture which contains N.sub.2 O is given a retention time of 0.1-3 seconds before being cooled down. About 90% of N.sub.2 O is thereby decomposed to N.sub.2 and O.sub.2. A hot gas mixture formed by catalytic combustion of ammonia is given a retention time of 0.5-2 seconds before it is cooled in a heat recovery unit. The combustion gases can also be brought in contact with a metal or metal oxide catalyst for selective decomposition of the N.sub.2 O.

REFERENCES:
patent: 3489515 (1970-01-01), Jockers et al.

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