公开(公告)号：US20030039597A1

公开(公告)日：2003-02-27

申请号：US09938448

申请日：2001-08-24

Applicant: ENGELHARD CORPORATION

Inventor： Michel Deeba ,  John K. Hochmuth ,  Uwe Dahle ,  Stefan Brandt

IPC: B01D053/50 ,  B01D053/56 ,  B01D053/94

CPC classification number: B01D53/9422 ,  B01D53/949 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2042 ,  B01D2255/2045 ,  B01D2255/2047 ,  B01D2255/2063 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/2006 ,  F01N13/009 ,  F01N2570/04 ,  F01N2570/14 ,  Y02A50/2344 ,  Y02T10/26

Abstract: The present invention relates to an article comprising a catalyst composition and a method useful for the removal of NOx and SOx contaminants from a gaseous stream, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with catalysts of the type generally referred to as nullclose coupled catalystsnull which are designed to reduce pollutants in engine exhaust emissions during engine cold start conditions. The article comprises a lean burn gasoline engine having an exhaust outlet, an upstream section having a close coupled catalyst composite in communication with the exhaust outlet, and a downstream section. The upstream close coupled catalyst composite comprises a first support; a first platinum group component; and a SOx sorbent component selected from the group consisting of oxides and mixed oxides of barium, lanthanum, magnesium, manganese, neodymium, praseodymium, and strontium. The downstream section comprises a second support; a second platinum group component; and a NOx sorbent component. The upstream section has substantially no components adversely affecting three-way conversion under operating conditions.

Abstract translation: 本发明涉及包含催化剂组合物和可用于从气流，特别是含有硫氧化物污染物的气态物流中除去NOx和SO x污染物的方法的制品。 更具体地，本发明涉及通常称为“紧密耦合的催化剂”的催化剂，其被设计为在发动机冷起动条件期间减少发动机废气排放物中的污染物。 该制品包括具有排气出口的稀燃汽油发动机，具有与排气出口连通的紧密耦合的催化剂复合材料的上游部分和下游部分。 上游紧耦合催化剂复合材料包括第一载体; 第一铂族组分; 和选自钡，镧，镁，锰，钕，镨和锶的氧化物和混合氧化物的SOx吸附剂组分。 下游部分包括第二支撑件; 第二铂族组分; 和NOx吸附剂组分。 上游部分基本上没有在操作条件下不利地影响三路转换的部件。