CATALYST FOR PURIFYING ENGINE EXHAUST GASES
    6.
    发明申请
    CATALYST FOR PURIFYING ENGINE EXHAUST GASES 审中-公开
    用于净化发动机排气的催化剂

    公开(公告)号:WO2004073856A1

    公开(公告)日:2004-09-02

    申请号:PCT/RU2004/000008

    申请日:2004-01-14

    IPC分类号: B01J23/89

    摘要: The inventive catalyst for purifying gasoline and diesel engine sulfur oxide-containing exhaust gases comprises a modular porous carrier or filter provided with a catalytically active layer. In order to increase the catalyst stability, in addition to platinum and palladium, complex oxides of base metals like lithium, potassium, magnesium, barium, lead, lanthanum, cerium and bismuth, and of transition metals like nickel, cobalt, manganese, vanadium, niobium, molybdenum and tungsten are added into the catalytically active layer, the modular carrier being formed from acid-resistant porous ceramics based on aluminium, boron, phosphorus and silicium oxides embodied in the form of a module or filter. The inventive technical solution combines the functions of a stable three-functional catalyst and a filter-accumulator of smoke black particles and sulphuric-acid compounds, and carries out the catalytic regeneration of the filter at a normal and high engine load. The inventive catalyst can be used for reducing the emission of most toxic exhaust gases and solid particles of a diesel engine when it is combined with partial recirculation of purified exhaust gases.

    摘要翻译: 用于净化汽油和柴油机含硫氧化物的废气的本发明催化剂包括设置有催化活性层的模块化多孔载体或过滤器。 为了提高催化剂稳定性,除了铂和钯之外,还可以使用诸如锂,钾,镁,钡,铅,镧,铈和铋的贱金属的复合氧化物,以及过渡金属如镍,钴,锰,钒, 铌,钼和钨被添加到催化活性层中,模块化载体由基于以模块或过滤器形式体现的铝,硼,磷和氧化硅的耐酸性多孔陶瓷形成。 本发明的技术方案结合了稳定的三功能催化剂和烟黑颗粒和硫酸化合物的过滤器的功能,并在正常和高的发动机负荷下进行过滤器的催化再生。 当本发明的催化剂与净化废气的部分再循环相结合时,可用于减少柴油发动机的大部分有毒废气和固体颗粒的排放。