| 摘要 |
PURPOSE:To improve the ability to convert CO and NO2 into harmless substances, by fixing Pt, Pd and CeO2 on a carrier consisting of either alumina cement, molten silica and activated alumina or hydraulic alumina and lithium composite oxide. CONSTITUTION:A heat-resistant porous carrier is prepared which has a high specific surface area and consists mainly of either alumina cement, molten silica and activated alumina or hydraulic alumina and lithium composite oxide. On this heat-resistant porous carrier, three kinds of catalyst metals, i.e., Pd, Pt and CeO2, are fixed to give a catalyst for purification of exhaust gases. This catalyst has improved ability to convert CO and NO2 into harmless substances, because of the large specific surface area of the carrier and the increased effective interaction between the carrier components and the catalyst metals. Further, the life of the catalytic ability is long and the deterioration of the ability can be prevented. |
