Method of purifying oxygen-excess exhaust gas
    6.
    发明公开
    Method of purifying oxygen-excess exhaust gas 失效
    Katalysator和Verfahren zur Reinigung von Abgasen mitSauerstoffüberschuss。

    公开(公告)号:EP0434063A1

    公开(公告)日:1991-06-26

    申请号:EP90124965.6

    申请日:1990-12-20

    摘要: Catalysts for purifying an exhaust gas containing an excess amount of oxygen, to remove nitrogen oxides, carbon monoxide and hydrocarbons therefrom, the catalyst containing silicon dioxide (SiO₂) and alumina (Al₂O₃) in a molar ratio of SiO₂ to Al₂O₃ of at least 15, and containing cobalt alone or in combination with at least one metal selected from alkali earth metals and rare earth metals, and a method of purifying the exhaust gas using the described catalyst. The catalyst exhibits less thermal deterioration of the properties and performances thereof during use at an elevated temperature for an extended time, and accordingly, has an excellent durability. The catalyst is particularly useful for the purification of exhaust gases originating from an internal combustion engine of an automobile, and a nitric acid production plant.

    摘要翻译: 用于净化含有过量氧气的废气以除去氮氧化物,一氧化碳和烃的催化剂,含有SiO 2与Al 2 O 3的摩尔比至少为15的二氧化硅(SiO 2)和氧化铝(Al 2 O 3)的催化剂, 并且单独或与至少一种选自碱土金属和稀土金属的金属组合的钴,以及使用所述催化剂净化废气的方法。 该催化剂在高温使用期间延长时间的性能和性能的热劣化较少,因此具有优异的耐久性。 催化剂特别可用于净化来自汽车内燃机的废气和硝酸生产装置。