发明申请
WO2021213458A1 NOVEL MULTI-REGIN CATALYSTS FOR CNG ENGINE EXHAUST GAS TREATMENTS WITH IMPROVED AMMONIA LEAKAGE CONTROL
审中-公开
基本信息:
- 专利标题： NOVEL MULTI-REGIN CATALYSTS FOR CNG ENGINE EXHAUST GAS TREATMENTS WITH IMPROVED AMMONIA LEAKAGE CONTROL
- 申请号：PCT/CN2021/088880 申请日：2021-04-22
- 公开(公告)号：WO2021213458A1 公开(公告)日：2021-10-28
- 发明人： QIAO, Dongsheng , WANG, Jingwen , ZHENG, Xiang
- 申请人： JOHNSON MATTHEY (SHANGHAI) CHEMICALS LIMITED
- 申请人地址： 588 Dong Xing Road, Song Jiang Industrial Zone
- 专利权人： JOHNSON MATTHEY (SHANGHAI) CHEMICALS LIMITED
- 当前专利权人： JOHNSON MATTHEY (SHANGHAI) CHEMICALS LIMITED
- 当前专利权人地址： 588 Dong Xing Road, Song Jiang Industrial Zone
- 代理机构： CCPIT PATENT AND TRADEMARK LAW OFFICE
- 优先权： CN202010332039.9 2020-04-24
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01J23/46 ; B01J35/00 ; F01N3/10
摘要：
A three-way catalyst article, and its use in an exhaust system for compressed natural gas engines, is disclosed. The catalyst article for treating exhaust gas from compressed natural gas (CNG) engine comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the first catalytic region comprises a first PGM component; and a second catalytic region beginning at the inlet end, wherein the second catalytic region comprises a second PGM component; wherein the first PGM component comprises palladium, platinum, or a combination thereof; and wherein the second PGM component comprises rhodium.