| 发明名称 |
CLOSE-COUPLED SCR SYSTEM |
| 摘要 |
A system for treating exhaust gases from a combustion engine and a method for using the same results in improved NOx conversion during engine startup. The system includes a compact SCR flow-through monolith installed upstream of a close-coupled SCR wall-flow filter, wherein the compact SCR flow-through monolith may be extruded or made of a thin-walled substrate, such that the SCR flow-through monolith has a smaller volume with lower heat capacity and higher catalyst loading relative to the SCR wall-flow filter. |
| 申请公布号 |
US2016166990(A1) |
申请公布日期 |
2016.06.16 |
| 申请号 |
US201314436811 |
申请日期 |
2013.10.17 |
| 申请人 |
JOHNSON MATTHEY PUBLIC LIMITED COMPANY |
发明人 |
PHILLIPS PAUL RICHARD;WYLIE JAMES ALEXANDER |
| 分类号 |
B01D53/94;F01N3/035;F01N3/20;F01N3/022 |
主分类号 |
B01D53/94 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A system for treating exhaust gases containing NOx from an engine, said system comprising:
a flow-through monolith having a first catalytic composition for selective catalytic reduction of NOx and having a first volume; a close-coupled particulate matter filter having a second catalytic composition for reduction of particulate matter and selective catalytic reduction of NOx and having a second volume; and a volume ratio of the first volume to the second volume of less than about 1:2, wherein said flow-through monolith is in fluid communication with, and incorporated upstream of, said particulate matter filter. |
| 地址 |
London GB |
