EXHAUST GAS PURIFICATION CATALYST
    7.
    发明申请
    EXHAUST GAS PURIFICATION CATALYST 审中-公开
    排气净化催化剂

    公开(公告)号:US20070179054A1

    公开(公告)日:2007-08-02

    申请号:US11669998

    申请日:2007-02-01

    IPC分类号: B01D53/94

    摘要: A catalytic matter comprises alumina particles. A compound oxide is loaded on surfaces of the alumina particles. The compound oxide contains cerium, zirconium, and lanthanum, but not aluminum. A catalytic metal is loaded on the surfaces of the alumina particles. The catalytic matter may be manufactured by preparing a first acidic solution containing aluminum, adding a first basic solution to the first acidic solution, thereby obtaining a second basic solution and precipitating a first hydroxide in the second basic solution, preparing a second acidic solution containing cerium, zirconium and lanthanum, adding the second acidic solution to the first hydroxide, thereby precipitating a second hydroxide on the first hydroxide, drying the first and second hydroxides to obtain an oxide matter, and loading a catalytic metal on the oxide matter. By loading the compound oxide containing cerium as an oxygen storage material on the alumina particle surfaces, the amount of the oxygen storage material on the surfaces of alumina particles may be increased, and the catalytic metal may loaded on or in the proximity of the oxygen storage material. Therefore, the catalytic metal may be supplied with sufficient amount of active oxygen to purify the exhaust gas.

    摘要翻译: 催化剂物质包括氧化铝颗粒。 复合氧化物负载在氧化铝颗粒的表面上。 复合氧化物含有铈,锆和镧,但不包括铝。 催化金属负载在氧化铝颗粒的表面上。 催化剂可以通过制备含有铝的第一酸性溶液,向第一酸性溶液中加入第一碱性溶液,从而获得第二碱性溶液并在第二碱性溶液中沉淀第一氢氧化物,制备含有铈的第二酸性溶液 ,锆和镧,将第二酸性溶液加入到第一氢氧化物中,由此在第一氢氧化物上沉淀第二氢氧化物,干燥第一和第二氢氧化物以获得氧化物,并将催化金属负载在氧化物上。 通过将含有铈作为储氧材料的复合氧化物负载在氧化铝颗粒表面上,可以增加氧化铝颗粒表面上的储氧材料的量,并且催化金属可以装载在氧储存器上或其附近 材料。 因此,催化金属可以被供给足量的活性氧来净化废气。

    Exhaust gas purification catalyst
    8.
    发明申请
    Exhaust gas purification catalyst 审中-公开
    废气净化催化剂

    公开(公告)号:US20060223698A1

    公开(公告)日:2006-10-05

    申请号:US11369247

    申请日:2006-03-07

    IPC分类号: B01J23/10

    摘要: Catalytic converter for exhaust gas purification comprises a carrier, an oxide layer positioned above the carrier and comprising a compound oxide of cerium (Ce) and magnesium (Mg) with its molar ratio of Mg/(Ce+Mg), and a catalytic metal loaded on the oxide layer. By comprising the compound oxide of cerium and magnesium in the oxide layer, higher purification performance or lower light-off temperature can be obtained under the lean exhaust gas condition during the engine startup.

    摘要翻译: 用于排气净化的催化转化器包括载体,位于载体上方的氧化物层,其包含铈(Ce)和镁(Mg)的复合氧化物,其摩尔比为Mg /(Ce + Mg),并且催化金属负载 在氧化层上。 通过在氧化物层中包含铈和镁的复合氧化物,在发动机起动期间在稀薄排气条件下可以获得更高的净化性能或更低的起燃温度。