| 摘要 |
PURPOSE: To obtain a catalyst having good stability and a good purifying effect on the components of waste gas by incorporating a copper oxide-zinc oxide- aluminum oxide spinel into the catalyst. CONSTITUTION: This catalyst contains a copper oxide-zinc oxide-aluminum oxide spinel expressed by the formula. In the formula, A, C and D satisfy A+C+D=3, A>0, C>0 and D>0. The metals in the spinel may be partly substituted with cobalt. In the production of the catalyst, the spinel containing all four metals of copper oxide, zinc oxide, cobalt oxide and aluminum oxide is produced and used as the catalyst. The catalyst is significantly stable against the components of waste gas and has an effect to oxidize hydrocarbons and to catalytically reduce NOn . The obtd. catalyst is advantageous when hydrocarbons are present in an enough concn. in the waste gas and the gas is at >=300 deg.C. Thus, good stability and a good purifying effect of the catalyst are obtd. |
