LNT catalyst with enhanced nitrogen oxide storage capacity at low temperature
    4.
    发明授权
    LNT catalyst with enhanced nitrogen oxide storage capacity at low temperature 有权
    LNT催化剂在低温下具有增强的氮氧化物储存容量

    公开(公告)号:US08853123B2

    公开(公告)日:2014-10-07

    申请号:US13854289

    申请日:2013-04-01

    发明人: Chang Ho Jung

    摘要: Disclosed is a lean NOx trap (LNT) catalyst with enhanced NOx storage capacity at low temperature. More particularly, an LNT catalyst with enhanced NOx storage capacity at low temperature and significantly inhibited thermal desorption is prepared by coating a washcoat on a honeycomb-type carrier and drying and baking the same. The washcoat contains a first catalyst powder in which barium (Ba) and a precious metal are supported on a ceria support, and a second catalyst powder in which a precious metal is supported on a magnesium (Mg)-substituted alumina support The LNT catalyst of the present invention is useful as a NOx reducing catalyst for a passenger diesel vehicle.

    摘要翻译: 公开了一种在低温下具有增强的NOx储存容量的贫NOx捕集器(LNT)催化剂。 更具体地说,通过在蜂窝型载体上涂覆修补基面涂层并干燥和烘焙来制备低温下具有增强的NOx储存容量并显着抑制热解吸的LNT催化剂。 修补基面涂层含有其中钡(Ba)和贵金属负载在二氧化铈载体上的第一催化剂粉末和其中贵金属负载在镁(Mg)取代的氧化铝载体上的第二催化剂粉末。 本发明作为乘用柴油车辆的NOx还原催化剂是有用的。