| 摘要 |
PROBLEM TO BE SOLVED: To clean an exhaust gas containing NO, CO, and hydrocarbons efficiently. SOLUTION: The first catalyst 1 in which Ag is supported on alumina, the second catalyst 2 in which Pt is supported on zeolite by an ion exchange method, and the third catalyst in which Pt for promoting an oxidation reaction and Ir for promoting a water gas conversion reaction are supported on zeolite are arranged in turn from the upstream side in an exhaust gas flow direction. |
