Method for removing nitrogen oxides from exhaust gases

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

B - Operations, Transporting

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23/353

B01D 53/56 (2006.01) B01D 53/94 (2006.01) B01J 29/06 (2006.01) F02B 1/04 (2006.01)

Patent

CA 2013869

Disclosed herein is a method for removing nitrogen oxides from exhaust gases containing oxygen and moisture, which comprises bringing the exhaust gas into contact with hydrogenated zeolite catalysts or hydrogenated zeolite catalysts impregnated with one or more kinds of metals selected from the group consisting of copper, zinc, vanadium, chromium, manganese, iron, cobalt, nickel, rhodium, palladium, platinum, and molybdenum, in the presence of organic compounds. The zeolite should be a zeolite having a silica/alumina ratio of 5 or above. The zeolite may be any one of zeolite of Y type, zeolite of L type, zeolite of offretite-erionite mixed crystal. type, zeolite of ferrierite type, zeolite of mordenite type, zeolite of clinoptilolite type, and zeolite of ZSM-5 type.

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