| 摘要 |
PURPOSE:To improve catalytic performance by allowing an oxide as a preliminary processing material to be borne on a thin wall support with a low coefficient of water absorption of a monolithic structure and then further allowing a specified catalytic component to be borne. CONSTITUTION:A specified catalytic component is allowed to be borne after an oxide as a preliminary processing material is allowed to be borne on a thin wall support with a low coefficient of water absorption of a monolithic structure. The oxide with a low coefficient of water absorption of a monolithic structure consists of a fireproof metal oxide with a coefficient of water absorption of 12wt.% or lower. The most favorably used support is a honeycomb support of cordierite. The thin wall design is for reducing a pressure loss when the catalyst is mounted on a vehicle and the actual wall thickness is 90% or lower than that of the conventional catalyst. The preliminary processing material is selected from among activated alumina, activated silica, cerium oxide, ziconium oxide and titanium oxide. The catalytic component is platinum element, activated aluminum or cerium oxide. Thus catalytic performance is enhanced. |
