发明授权
- 专利标题： SMALL PORE MOLECULAR SIEVE SUPPORTED COPPER CATALYSTS DURABLE AGAINST LEAN/RICH AGING FOR THE REDUCTION OF NITROGEN OXIDES
- 专利标题（中）： 小孔分子筛支撑的铜催化剂可耐受稀/富老化以减少氮氧化物
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申请号： EP15189846.7申请日： 2010-04-19
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公开(公告)号： EP2995367B1公开(公告)日： 2017-12-20
- 发明人: ANDERSEN, Paul Joseph , CHEN, Hai-Ying , FEDEYKO, Joseph , WEIGERT, Erich
- 申请人： Johnson Matthey Public Limited Company
- 申请人地址： 5th Floor 25, Farringdon Street London EC4A 4AB GB
- 专利权人： Johnson Matthey Public Limited Company
- 当前专利权人： Johnson Matthey Public Limited Company
- 当前专利权人地址： 5th Floor 25, Farringdon Street London EC4A 4AB GB
- 代理机构： Nunn, Andrew Dominic
- 优先权： US170358P 20090417; US312832P 20100311
- 主分类号： B01J37/02
- IPC分类号： B01J37/02 ; B01J37/16 ; B01J29/072 ; B01J29/56 ; B01J29/76 ; B01J29/46 ; B01D53/86 ; B01D53/94 ; B01J29/83 ; B01J35/00 ; B01J35/04 ; B01J37/00 ; B01J29/85
摘要：
A system for treating exhaust gas from a vehicular lean-burn internal combustion engine with a lean/rich cycle, which system comprising a NO x adsorber catalyst and a downstream NH 3 -selective catalytic reduction (SCR) catalyst, wherein the NH 3 -SCR catalyst comprises copper supported on a molecular sieve, wherein the molecular sieve (a) has a maximum ring size of eight tetrahedral atoms; (b) is selected from the group consisting of aluminosilicate molecular sieves, metal-substituted aluminosilicate molecular sieves, and aluminophosphate molecular sieves; and (c) has a CHA Framework Type Code.
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