发明申请
US20180221860A1 Exhaust System Without a DOC Having an ASC Acting as a DOC in a System with an SCR Catalyst Before the ASC
审中-公开
基本信息:
- 专利标题： Exhaust System Without a DOC Having an ASC Acting as a DOC in a System with an SCR Catalyst Before the ASC
- 申请号：US15947112 申请日：2018-04-06
- 公开(公告)号：US20180221860A1 公开(公告)日：2018-08-09
- 发明人： Mikael Larsson
- 申请人： Johnson Matthey Public Limited Company
- 主分类号： B01J29/76
- IPC分类号： B01J29/76 ; F01N13/00 ; B01J29/78 ; B01J29/74 ; B01J37/02 ; F01N3/28 ; F01N3/20 ; F01N3/10 ; B01J35/04 ; B01D53/94 ; B01J35/00 ; B01J23/648 ; B01J21/04 ; B01J23/44
摘要：
Catalyst articles having a first zone containing a first SCR catalyst and a second zone containing an ammonia slip catalyst (ASC), where the ammonia slip catalyst contains a second SCR catalyst and an oxidation catalyst, and the ASC has DOC functionality, where the first zone is located on the inlet side of the substrate and the second zone is located in the outlet side of the substrate are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases, in reducing the amount of ammonia slip and in oxidizing organic residues. Exhaust systems containing the catalyst articles and methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced and hydrocarbon are oxidized by the ASC catalyst, are also described.
公开/授权文献:
IPC结构图谱:
| B | 作业；运输 |
| --B01 | 一般的物理或化学的方法或装置 |
| ----B01J | 化学或物理方法，例如，催化作用、胶体化学；其有关设备 |
| ------B01J29/00 | 包含分子筛的催化剂 |
| --------B01J29/03 | .不具有碱交换特性 |
| ----------B01J29/06 | ..硅铝酸盐 |
| ------------B01J29/08 | ...八面沸石型的，例如，X型或Y型的 |
| --------------B01J29/72 | ....含铁族金属，贵金属或铜 |
| ----------------B01J29/76 | .....铁族金属或铜 |