Exhaust gas purifying catalyst and exhaust gas purifying method
    5.
    发明授权
    Exhaust gas purifying catalyst and exhaust gas purifying method 失效
    废气净化催化剂和废气净化方法

    公开(公告)号:US06214307B1

    公开(公告)日:2001-04-10

    申请号:US08973684

    申请日:1997-12-11

    IPC分类号: B01J802

    摘要: An exhaust-gas-purifying catalyst is made by depositing on a support iridium serving as a catalyst active substance, sulfur for improving the catalyst activity of iridium and, if necessary, platinum. The sulfur is preferably contained as a sulfate. The exhaust-gas-purifying process of the present invention is a process in which exhaust gas from an internal combustion engine is allowed to pass through the exhaust-gas-purifying catalyst with the exhaust-gas temperature being set in the range of 200° C. to 700° C. at the inlet of the exhaust-gas-purifying catalyst. The above-mentioned composition and process provide an activity for purifying exhaust gas, especially for eliminating nitrogen oxides in an oxidizing atmosphere, in a wide temperature range, allow high heat-resistance and durability, and consequently, are superior in practical use.

    摘要翻译: 通过在用作催化剂活性物质的载体铱上沉积硫以提高铱的催化剂活性,如果需要,通过沉积铂来制备废气净化催化剂。 优选硫作为硫酸盐包含。 本发明的废气净化方法是将排气温度设定在200℃的范围内使来自内燃机的废气通过废气净化用催化剂的方法 在排气净化催化剂的入口处为700℃。 上述组成和方法提供了在宽温度范围内特别用于消除氧化性气氛中的氮氧化物的排气净化活性,具有高的耐热性和耐久性,因此具有优异的实用性。