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    SOX tolerant NOX trap catalysts and methods of making and using the same
    1.
    发明授权
    SOX tolerant NOX trap catalysts and methods of making and using the same 有权
    SOX耐受性NOX捕集催化剂及其制备和使用方法

    公开(公告)号：US06419890B1

    公开(公告)日：2002-07-16

    申请号：US09634228

    申请日：2000-08-09

    Applicant: Yuejin Li

    Inventor： Yuejin Li

    IPC: B01D5354

    CPC classification number: B01D53/9422 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/2063 ,  B01D2255/2068 ,  B01D2258/012 ,  B01J23/005 ,  B01J23/42 ,  B01J23/8946

    Abstract: The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved NOx trap catalysts for use in diesel engines as well as lean burn gasoline engines. The sulfur tolerant NOx trap catalyst composites comprise a platinum component, a support, a NOx sorbent component, and a spinel material prepared by calcining an anionic clay material represented by the formula MmNn(OH)(2m+2n)Aa.bH2O, wherein the formula is defined herein. The sulfur tolerant NOx trap catalyst composites are highly effective with a sulfur containing fuel by trapping sulfur oxide contaminants which tend to poison conventional NOx trap catalysts used to abate other pollutants in the stream. The sulfur tolerant NOx trap catalyst composites are suitable for diesel engines because the composites can be regenerated at moderate temperatures with rich pulses, rather than at high temperatures.

    Abstract translation: 本发明涉及可用于减少废气流中的污染物，特别是含有硫氧化物污染物的气流的耐硫催化剂复合材料。 更具体地，本发明涉及用于柴油发动机以及贫燃汽油发动机的改进的NOx捕集催化剂。 耐硫NOx捕集催化剂复合材料包括铂组分，载体，NOx吸附剂组分和通过煅烧由式MmNn（OH）（2m + 2n）Aa.bH2O表示的阴离子粘土材料制备的尖晶石材料，其中 公式在本文中定义。 耐硫NOx捕集催化剂复合材料通过捕集硫氧化物污染物而非常有效地含硫燃料，硫氧化物污染物倾向于毒害用于消除流中其它污染物的常规NOx捕集催化剂。 耐硫NOx捕集催化剂复合材料适用于柴油发动机，因为复合材料可以在中等温度下以丰富的脉冲而不是在高温下再生。

    Catalytic decomposition of N.sub.2 O
    9.
    发明授权
    Catalytic decomposition of N.sub.2 O 失效
    催化分解N2O

    公开(公告)号：US5171553A

    公开(公告)日：1992-12-15

    申请号：US790611

    申请日：1991-11-08

    Applicant: Yuejin Li ,  John N. Armor

    Inventor： Yuejin Li ,  John N. Armor

    IPC: B01D53/94 ,  B01D53/86 ,  B01J29/20 ,  B01J29/42 ,  B01J29/72

    CPC classification number: B01D53/8628 ,  Y02C20/10

    Abstract: The invention describes a highly efficient catalytic pollution control process for removing N.sub.2 O from gaseous mixtures. The catalytic process, which is substantially unaffected by the presence of oxygen, comprises contacting an N.sub.2 O-containing gaseous mixture with a catalyst comprising a crystalline zeolite which, at least in part, is composed of five membered rings having a structure type selected from the group consisting of BETA, MOR, MFI, MEL and FER wherein the crystalline zeolite has been at least partially ion-exchanged with a metal selected from the group consisting of copper, cobalt, rhodium, iridium, ruthenium and palladium under conditions sufficient to convert the N.sub.2 O into gaseous nitrogen and gaseous oxygen.

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