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

B - Operations, Transporting

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B01J 29/076 (2006.01) B01D 53/86 (2006.01) B01J 23/24 (2006.01) B01J 27/053 (2006.01)

Patent

CA 1295598

Abstract of the Disclosure A process for removing nitrogen oxides from an exhaust gas containing the nitrogen oxides and an arsenic compound, which comprises bringing said exhaust gas into contact with a reducing gas in the presence of a catalyst to reduce the nitrogen oxides in the exhaust gas and render them nontoxic. There are disclosed two types of catalysts: (1) a catalyst comprising (A) an oxide of titanium, (B) an oxide of at least one metal selected from tungsten and molybdenum, (C) an oxide of vanadium, and (D) an oxide and/or a sulfate of at least one metal selected from the group consisting of yttrium, lanthanum, cerium and neodymium, and (2) the above (A), (B), (C) components and (D)' at least one metal selected from the group con- sisting of yttrium, lanthanum, cerium, neodymium, copper, cobalt, manganese and iron, the component (D)' being deposited on zeolite.

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