PROCESSING METHODS AND FORMULATIONS TO ENHANCE STABILITY OF LEAN-NOx-TRAP CATALYSTS BASED ON ALKALI- AND ALKALINE-EARTH-METAL COMPOUNDS
    10.
    发明申请
    PROCESSING METHODS AND FORMULATIONS TO ENHANCE STABILITY OF LEAN-NOx-TRAP CATALYSTS BASED ON ALKALI- AND ALKALINE-EARTH-METAL COMPOUNDS 审中-公开
    基于碱金属和碱土金属化合物的提高NOx-捕捉催化剂稳定性的加工方法和配方

    公开(公告)号:US20060035782A1

    公开(公告)日:2006-02-16

    申请号:US10710920

    申请日:2004-08-12

    IPC分类号: B01J23/10 B01J31/00

    摘要: The present invention provides a coarsening resistant automotive exhaust catalyst composition. The composition of the invention comprises a metal or metal-containing compound and a component having alkali metal or an alkaline-earth metal ions bonded to a conjugate base oxide of an inorganic acid. The inorganic acid for which the base oxide is conjugate has a Ka such that the automotive exhaust catalyst composition resists phase transitions that reduce surface area. The present invention also provides a NOx trap which incorporates the exhaust catalyst composition of the invention. Finally, a method of inhibiting coarsening in automotive exhaust catalyst is also provided.

    摘要翻译: 本发明提供一种抗粗化的汽车尾气催化剂组合物。 本发明的组合物包含含金属或含金属的化合物和具有与无机酸的共轭基础氧化物结合的碱金属或碱土金属离子的成分。 基础氧化物共轭的无机酸具有Ka,使得汽车排气催化剂组合物抵抗减少表面积的相变。 本发明还提供一种纳入本发明的排气催化剂组合物的NOx捕集器。 最后,还提供了一种抑制汽车尾气催化剂粗化的方法。