公开(公告)号：US20110120093A1

公开(公告)日：2011-05-26

申请号：US12989264

申请日：2009-03-21

申请人： Stephan Eckhoff ,  Paul Spurk ,  Lothar Mussmann ,  Wilfried Muleller

发明人： Stephan Eckhoff ,  Paul Spurk ,  Lothar Mussmann ,  Wilfried Muleller

IPC分类号： F01N3/035

CPC分类号： F01N3/0231 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/106 ,  F01N3/2066 ,  F01N13/009 ,  F01N2610/02 ,  Y02T10/24

摘要： The present invention relates to a process for purifying NOx-containing exhaust gases formed in an internal combustion engine. In particular, the invention is directed at the purification of exhaust gases from an engine which produces a lean-burn exhaust gas, e.g. a diesel engine or a spark-ignition engine operated under lean conditions. Furthermore, the present invention relates to an appropriately equipped exhaust gas purification apparatus. The apparatus proposes a sequence of different catalysts for purifying primary axhaust gas of lean-burn engines, in which an oxidatively active particle filter (1) is followed by an oxidation catalyst (2) and this is in turn followed by an SCR catalyst, (3c) with the latter being arranged downstream of an addition of reducing agent (3a) located downstream of the oxidation catalyst (2).

摘要翻译： 本发明涉及一种净化形成在内燃机中的含NO x废气的方法。 特别地，本发明涉及净化来自发动机的废气，其产生贫燃废气，例如， 柴油发动机或在精细条件下运行的火花点火发动机。 此外，本发明涉及适当配备的废气净化装置。 该装置提出了用于净化贫燃发动机的主要废气的不同催化剂的序列，其中氧化活性颗粒过滤器（1）之后是氧化催化剂（2），然后是SCR催化剂（ 3c），后者位于加入位于氧化催化剂（2）下游的还原剂（3a）的下游。