Abstract
The title reaction over alumina and 5.0 wt% Me (Me: Co, Fe or Cu) added alumina catalysts ( Me Al 2O 3 ) was investigated in the presence of SO 2. Their NO reduction activities were decreased by SO 2 poisoning, depending on the kinds of the catalysts. A most strongly poisoned catalyst was Fe Al 2O 3 , followed by Al 2O 3, Co Al 2O 3 , and Cu Al 2O 3 . The XPS studies of deactivated Me Al 2O 3 catalysts revealed that sulfate-ion like species were formed on all the catalysts, and moreover, on Fe or Co Al 2O 3 , corresponding metal-sulfate like species were also formed. The selective catalytic reduction of NO 2 by ethene in the presence of SO 2 was also investigated, and some mechanistic discussion was given.
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