| 摘要 |
PURPOSE:To enhance decontaminating performance for CO, HC and NOx and especially to remarkably enhance decontaminating performance for HC by adding alkaline earth metallic oxide to a palladium oxide catalyst and furthermore using cerium oxide and zirconium oxide. CONSTITUTION:A catalyst provided to the inflow side of exhaust gas is obtained by coating an integral structural body with a catalyst component constituted of palladium, alkaline earth metallic oxide, cerium oxide, zirconium oxide and refractory inorganic oxide. Further the catalyst provided to the outflow side of exhaust gas is obtained by coating the integral structural body with the catalyst component incorporating rhodium and platium or rhodium, platinum and palladium and also the refractory inorganic oxide. Three components of HC,CO and NOx can be simultaneously removed thereby at low temperature. Furthermore good ternary performance especially the purification performance of HC can be enhanced. |
