Catalyst for purifying exhaust gases
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsToshiyuki Sakai, Kazuhide Miyazaki, Michiaki Yamamoto
Life of this patent
Estimating the term…
Abstract
A multi-component catalyst composition prepared by combining (A) noble metal catalyst elements effective for oxidizing carbon monoxide and hydrocarbons with (B) catalyst elements effective for the same purpose but containing no noble metal. The multi-component catalyst composition is effective in purifying exhaust gases containing nitrogen oxides, carbon monoxide and hydrocarbons by converting these harmful components into harmless components.
Claims2
A single catalyst bed for purifying exhaust gases from combustion operations by transforming CO, hydrocarbons and nitrogen oxides into harmless substances, consisting essentially of two catalyst components A and B, wherein
- component A consists essentially of at least one metal selected from the group consisting of Pd and Pt, said metal being supported on an inert catalyst carrier, and component B consists essentially of 5 to 10 parts by weight of Mn.sub.2 O.sub.3, 10 to 20 parts by weight of CuO, 5 to 10 parts by weight of Fe.sub.2 O.sub.3, 60 to 80 parts by weight of gamma aluminum oxide and 1 to 5 parts by weight of MgO.
Dependencies are inferred from the claim text.