CATALYST FOR DEOXIDIZING NITROGEN OXIDE SELECTIVELY

摘要

PROBLEM TO BE SOLVED: To provide a catalyst exhibiting high activity stably over a long period of time under a wide reaction condition such as temperature and space velocity when used for deoxidizing NOx contained in exhaust gas in an oxygen-excess atmosphere by using CO.

SOLUTION: The catalyst for deoxidizing nitrogen oxides selectively in the presence of oxygen by using carbon monoxide is obtained by depositing iridium and one or more metals selected from metals of group I, group II, group III, group IX, group XI and group XII in the periodic table on a carrier consisting of tungsten oxide and silica.

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