公开(公告)号：US20170341026A1

公开(公告)日：2017-11-30

申请号：US15608276

申请日：2017-05-30

申请人： Johnson Matthey Public Limited Company

发明人： Hai-Ying Chen ,  Julian Cox ,  Joseph Fedeyko ,  Penelope Markatou ,  Jason Pless

IPC分类号： B01D53/94 ,  F01N3/08 ,  F01N11/00 ,  B01J23/22

CPC分类号： B01D53/9418 ,  B01D2255/20723 ,  B01D2255/904 ,  B01D2255/91 ,  B01D2255/915 ,  B01J23/22 ,  F01N3/021 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/103 ,  F01N3/106 ,  F01N3/2066 ,  F01N11/002 ,  F01N2240/40 ,  F01N2370/00 ,  F01N2570/145 ,  F01N2610/02 ,  Y02A50/2344 ,  Y02C20/10 ,  Y02T10/22 ,  Y02T10/24

摘要： An exhaust gas purification system for lowering the content of impurities in a lean exhaust gas of an internal combustion engine comprising, a feeding device that feeds ammonia or a compound decomposable to ammonia into an exhaust gas stream containing nitrogen oxides; a selective catalytic reduction catalyst comprising vanadium (V-SCR catalyst) which catalyzes the nitrogen oxides with ammonia in a temperature range of about 150° C. to about 400° C. and at an NO2/NOx ratio of about 0.3 to about 0.9; and a downstream system comprising a diesel oxidation catalyst.