公开(公告)号：US20100223919A1

公开(公告)日：2010-09-09

申请号：US12604090

申请日：2009-10-22

Applicant: Jin Ha LEE ,  Hyokyung LEE ,  Sangmin LEE ,  Jun Sung PARK

Inventor： Jin Ha LEE ,  Hyokyung LEE ,  Sangmin LEE ,  Jun Sung PARK

IPC: F01N3/10 ,  F01N3/20 ,  F01N3/28 ,  B01D53/94 ,  B01D53/56 ,  B01J29/06 ,  B01J29/04

CPC classification number: B01D53/9418 ,  B01D53/9422 ,  B01D53/9468 ,  B01D2251/208 ,  B01D2255/102 ,  B01D2255/106 ,  B01D2255/2042 ,  B01D2255/2065 ,  B01D2255/207 ,  B01D2255/50 ,  B01D2255/91 ,  B01J29/061 ,  B01J37/0244 ,  B01J37/0246

Abstract: An NOx reduction catalyst and an exhaust system using the same may include an NOx reduction catalyst mounted at an exhaust pipe through which exhaust gas passes, wherein the NOx reduction catalyst includes first and second catalyst layers coated on a carrier, the first catalyst layer being disposed close to the exhaust gas, and the second catalyst layer being disposed close to the carrier, wherein a portion of nitrogen oxide contained in the exhaust gas is oxidized while passing through the first catalyst layer, and the oxidized nitrogen oxide is stored in the second catalyst layer, wherein the nitrogen oxide stored in the second catalyst layer is released through a substitution reaction with an additionally injected fuel, and wherein the released nitrogen oxide is reduced by the additionally injected fuel in the first catalyst layer.

Abstract translation: 使用其的NOx还原催化剂和排气系统可以包括安装在废气通过的排气管上的NOx还原催化剂，其中所述NOx还原催化剂包括涂覆在载体上的第一和第二催化剂层，所述第一催化剂层被设置 靠近废气，第二催化剂层设置在载体附近，其中包含在废气中的一部分氮氧化物在通过第一催化剂层时被氧化，并且氧化的氮氧化物被储存在第二催化剂 其中存储在所述第二催化剂层中的氮氧化物通过与另外注入的燃料的取代反应而释放，并且其中所述释放的氮氧化物通过在所述第一催化剂层中的另外喷射的燃料而被还原。