Method of purifying non-containing exhaust gases using iron cont

Details Method of purifying non-containing exhaust gases using iron cont Method of purifying non-containing exhaust gases using iron cont

1995-02-15

1996-08-06

Bos, Steven

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01J 800

Patent

active

055431259

ABSTRACT:
A method of purifying NOx-containing exhaust gases characterized by using ammonium acetate as a reducing agent with a zeolite-based catalyst. NO.sub.x in NO.sub.x -containing exhaust gases can be removed extremely effectively even at a low concentration thereof by using Fe-treated mordenite as a zeolite-based catalyst according to said method, and since it uses ammonium acetate as a reducing agent, an excellent effect free from ammonia leakage can be obtained. Particularly NO.sub.x in NO.sub.x -containing exhaust gases can be removed effectively at and around a discharge temperature of an exhaust gas from a gas engine in the presence of ammonium acetate as a reducing agent by constituting Fe-containing mordenite as a monolithic material. Hence, it makes it possible to obtain an excellent effect of simplifying the whole denitration system without needing temperature control of an exhaust gas and/or a catalyst bed. In addition, the NO.sub.x -purifying ability of the catalyst does not decrease over a long period of time.

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Database WPI, Section Ch, Week 9506, Derwent Publications Ltd., London, GB; & JP-A-06 319 954, 22 Nov. 1994, abstract.

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