公开(公告)号：US07160832B2

公开(公告)日：2007-01-09

申请号：US10462126

申请日：2003-06-16

申请人： Mark Crocker ,  Thierry Leprince ,  Takeshi Matsumoto ,  Takuji Nakaene

发明人： Mark Crocker ,  Thierry Leprince ,  Takeshi Matsumoto ,  Takuji Nakaene

IPC分类号： B01J29/072

CPC分类号： B01D53/9477 ,  B01D53/90 ,  B01D53/944 ,  Y02A50/2341

摘要： The present invention provides a catalyst system that may be used to regenerate NOx adsorber catalysts. It also provides methods for using these catalysts. According to the present invention, hydrocarbons are introduced into an exhaust gas stream upstream of a metal ion exchanged zeolite catalyst to generate CO. The metal ion exchanged zeolite catalyst is preferably a Cu-ZSM-5 catalyst that has a high loading of copper. The hydrocarbons are oxidized to carbon monoxide, and the carbon monoxide is then exposed to a NOx adsorber catalyst, which facilitates regeneration of that catalyst.

摘要翻译： 本发明提供可用于再生NO x吸附剂催化剂的催化剂体系。 它还提供了使用这些催化剂的方法。 根据本发明，将烃引入到金属离子交换的沸石催化剂上游的废气流中以产生CO。金属离子交换的沸石催化剂优选为具有高负载量的Cu-ZSM-5催化剂。 烃被氧化成一氧化碳，然后将一氧化碳暴露于NOX 2吸附剂催化剂，这促进了该催化剂的再生。