| 摘要 |
PURPOSE:To reduce production of noxious component such as NOX, CO contained in exhaust gas from a Bunsen type burner and a Schwank type burner, by using a catalyst formed by a perovskite type composite oxide. CONSTITUTION:A mixture ratio of the fuel to a primary air is brought to less than an equivalent, i.e., a fuel excess state to form a fuel excess range 7 in flame. A net 2, in which catalyst powder, represented by a general formula of Sr(1+x)12La(1-x)12Co1-xMaxO2, wherein Me is a metal selected from Fe, Mn, V, and Ti, and 0<x<1, is mixed with MgO, being a carrier, and magnesia mixture to firmly adhere the mixture to the surface, is located above a burner 1. The catalyst is formed by a relatively cheap element, but has a catalyst power equal to that of a precious metal and high resistance to heat. Besides, it is stable even in reducing gas, and furthermore, if basic oxide forms a carrier, catalyst activity if further improved. |
