Catalyst for purification of exhaust gases
    1.
    发明授权
    Catalyst for purification of exhaust gases 失效
    用于净化废气的催化剂

    公开(公告)号:US5306684A

    公开(公告)日:1994-04-26

    申请号:US37535

    申请日:1993-03-26

    摘要: There is described a catalyst for purification of exhaust gases containing nitrogen oxides wherein oxygen is co-existent in excess of a stoichiometric amount, characterized in that a coprecipitated mixed oxide of copper and tin is loaded on a carrier composed of at least one type selected from the group consisting of crystalline aluminosilicate, aluminogallosilicate and gallosilicate, or the coprecipitated mixed oxide of copper and tin and further at least one noble metal selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, silver and gold are co-loaded thereon.This invention provides a lean NOx purification catalyst having high NOx purification performance and markedly increased durability over a wide temperature range.

    摘要翻译: 描述了一种用于净化含有氧化物的废气的催化剂,其中氧气共存超过化学计量,其特征在于将铜和锡的共沉淀的混合氧化物负载在载体上,所述载体由至少一种选自 由结晶硅铝酸盐,铝硅酸盐硅酸盐和硅酸盐硅酸盐组成的组,或铜和锡的共沉淀混合氧化物以及另外选自铂,钯,铑,铱,钌,银和金的至少一种贵金属, 上。 本发明提供了具有高NO x净化性能的稀NOx净化催化剂,并且在宽的温度范围内显着提高了耐久性。