A denitrizing catalyst which comprises: (a) an alkali metal oxide or an alkaline earth metal oxide in amounts of 50-90% by weight as oxides; (b) at least one metal oxide selected from the group consisting of Co3O4, Cu2O, Cr2O3, Mn2O3, NiO, PbO, Bi2O3, MoO2, Al2O3, SiO2, ZrO2, Fe2O3, TiO2, WO3, MoO3,
A denitrizing catalyst which comprises: (a) an alkali metal oxide or an alkaline earth metal oxide in amounts of 50-90% by weight as oxides; (b) at least one metal oxide selected from the group consisting of Co3O4, Cu2O, Cr2O3, Mn2O3, NiO, PbO, Bi2O3, MoO2, Al2O3, SiO2, ZrO2, Fe2O3, TiO2, WO3, MoO3, SnO2 and ZnO in amounts of 5-50% by weight as oxides; and (c) at least one metal or at least one oxide of metals selected from the group consisting of Ru, Rh, Pd, Ag, Pt and Au in amounts of 0.01-10% by weight as metals. Nitrogen oxides contained in waste gases are denitrized effectively by putting the gases into contact with the catalysts in the absence or presence of carbon monoxide as a reducing agent.
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A method of denitrizing nitrogen oxides contained in waste gases which consists essentially of: putting the waste gases into contact with a denitrizing catalyst which comprises: (a) an alkali metal oxide or an alkaline earth metal oxide in amounts of 50-90% by weight as oxides; (b) at least one meta
A method of denitrizing nitrogen oxides contained in waste gases which consists essentially of: putting the waste gases into contact with a denitrizing catalyst which comprises: (a) an alkali metal oxide or an alkaline earth metal oxide in amounts of 50-90% by weight as oxides; (b) at least one metal oxide selected from the group consisting of Co3O4, Cu2O, Mn2O3, NiO, PbO, Bi2O3 and MoO2 in amounts of 5-50% by weight as oxides; and (c) at least one metal or oxide of a metal selected from the group consisting of Ru, Rh, Pd, Ag, Pt and Au in amounts of 0.01-10% by weight as metals, in the presence or absence of carbon monoxide as a reducing agent at a temperature of 400°-600°C.
Deeba Michel ; Speronello Barry K., Composition for oxidizing carbon monoxide in the presence of sulfur compounds with reduced formation of SO.sub.3 from SO.sub.2.
Mishima, Takahiro; Uetani, Masatoshi, Exhaust gas purifying catalyst, exhaust gas purification device and filter, and method for producing said catalyst.
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