| 摘要 |
PURPOSE:To improve purification capacity for exhaust gas and durability of an exhaust gas purification catalyst by depositing a metallic catalyst to a porous carrier consisting of each specified amt. of calcium aluminate, fused silica, and hydraulic alumina or activated alumina. CONSTITUTION:26-50wt.% calcium aluminate, 40-65wt.% fused silica, are mixed with 5-20wt.% hydraulic alumina or activated alumina. The mean particle size of each calcium aluminate, fused silica, and hydraulic alumina or activated alumina is 3-30mum, 5-40mum, and 1-50mum, respectively. An exhaust gas purification catalyst is produced by depositing a metallic catalyst to a porous carrier obtd. by molding, hardening, and drying a paste obtd. by adding water to the mixture. In this case, the porous carrier is heat-treated at least before or after depositing the metallic catalyst. |
