| 摘要 |
PURPOSE:To subject the fuel to a stable and efficient oxidization reaction under an air-to-fuel ratio in a wide range and to clean the exhaust gas by providing a first catalyst member carrying an oxidized catalyst other than CuO at the upstream side of a pre-mixed air current, and a second catalyst member carrying CuO as an oxidized catalyst at the downstream side. CONSTITUTION:The first catalyst member 11 carrying an oxidized catalyst other than CuO is provided at the upstream side of a pre-mixed air current formed by pre-mixing a gaseous fuel or an evaporated liquid fuel with combustion air, and a second catalyst 12 carrying CuO as an oxidized catalyst is provided at the downstream side of the pre-mixed air current. The interval between the first catalyst member 11 and the second catalyst member 12 is set so that the temperature of the second catalyst 12 becomes about 800-1,000 deg.C. Further, the first catalyst 11 carries on the carrier one or more members selected from the group consisting of transient oxides such as Ni, Co, Cr and the like. The CuO carrying rate of the second catalyst member 12 is set to 1-5wt% with respect to the weight of the carrier. |
