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    Method of purifying exhaust gas and catalyst for purifying exhaust gas
    1.
    发明授权
    Method of purifying exhaust gas and catalyst for purifying exhaust gas 失效
    净化废气的方法和净化废气的催化剂

    公开(公告)号：US06191061B1

    公开(公告)日：2001-02-20

    申请号：US09402492

    申请日：1999-12-29

    申请人： Toshihiro Takada ,  Hiroaki Takahashi ,  Masaru Ishii ,  Saeko Kurachi

    发明人： Toshihiro Takada ,  Hiroaki Takahashi ,  Masaru Ishii ,  Saeko Kurachi

    IPC分类号： B01J2906

    CPC分类号： B01D53/9418 ,  B01D2255/102 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/504 ,  B01D2255/912 ,  B01J29/068 ,  B01J37/0246

    摘要： In an exhaust gas in an oxygen-rich atmosphere, a method of purifying an exhaust gas and a catalyst for purifying an exhaust gas, which can exhibit a high NOx conversion securely, are provided. Disclosed is a method of purifying an exhaust gas that reduces and purifies NOx in an exhaust gas in an oxygen-rich atmosphere. Here, as a catalyst for purifying an exhaust gas, a loading layer comprising zeolite is loaded with alumina sulfate and cerium sulfate-zirconium composite oxide, and Pt is loaded on these. And, in a temperature range where HC are not oxidized, the HC are adsorbed and held by the zeolite, the HC, which the zeolite releases at the temperature increment, are subjected to cracking by the zeolite, the alumina sulfate and the cerium sulfate-zirconium composite oxide, and the thus produced low-grade HC are turned into reducing agents, thereby reducing and purifying the NOx in the exhaust gas.

    摘要翻译： 在富氧气氛中的废气中，提供了可以显示高NOx转化率的废气净化方法和净化废气的催化剂。 公开了一种净化排气的方法，其减少和净化富氧气氛中的废气中的NOx。 这里，作为净化废气的催化剂，负载有负载层的沸石负载有硫酸铝和硫酸铈 - 锆复合氧化物，并且在其上装载Pt。 并且，在HC不被氧化的温度范围内，HC被沸石吸附并保持，沸石以温度增量释放的HC通过沸石，硫酸铝和硫酸铈 - 锆复合氧化物，并将由此生产的低品位HC转化为还原剂，从而减少和净化废气中的NOx。