Process for purifying exhaust gas and catalyst molded...

Details Process for purifying exhaust gas and catalyst molded... Process for purifying exhaust gas and catalyst molded...

B - Operations, Transporting

01

J

23/353, 252/98

B01J 23/22 (2006.01) B01D 53/86 (2006.01) B01D 53/94 (2006.01) B01J 23/24 (2006.01)

Patent

CA 2013100

An exhaust gas containing a nitrogen oxides is passed at a temperature of 250 to 550°C in the presence of a reducing agent through a catalyst bed filled with a molded denitration catalyst comprising at least the following three catalyst components (A) an oxide of at least one metallic element selected from the group consisting of Ti, Si and Zr. (B) an oxide of at least one metallic element selected from the group consisting of Mo and W, and (C) an oxide of V such that the concentrations of the oxide (B) and/or the oxide (C) in the exhaust gas inlet site of the catalyst bed are higher than in the other site thereof. The molded denitration catalyst is also described.

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