发明授权
- 专利标题： Catalyst for purifying exhaust gases and process for producing the same
- 专利标题（中）： 净化废气的催化剂及其制造方法
-
申请号： US571638申请日： 1995-12-13
-
公开(公告)号： US5702675A公开(公告)日： 1997-12-30
- 发明人: Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi
- 申请人： Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi
- 申请人地址： JPX
- 专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址： JPX
- 优先权： JPX6-313665 19941216
- 主分类号： B01D53/86
- IPC分类号： B01D53/86 ; B01D53/94 ; B01J23/56 ; B01J23/58 ; B01J23/63 ; B01J37/02 ; F01N3/08 ; B01D53/92
摘要：
A catalyst for purifying exhaust gases, which is composed of a catalyst substrate, a first porous support layer supporting barium as a NOx-occluding material and palladium, which is formed on the catalyst support, and a second porous support layer supporting platinum, which is formed on the first porous support layer. Platinum efficiently oxidizes nitrogen monoxide to be converted into nitrogen dioxide. Palladium is supported in a highly dispersed state even after endurance to act as inlet and outlet of barium for nitrogen dioxide or the like, whereby absorption and emission of nitrogen oxides can be performed smoothly, and accordingly, the purification performance for nitrogen oxides is improved.
公开/授权文献
- US4001244A 1-Aryl-3,4-dihydro-2(1H)-isoquinoline carbonyl chlorides 公开/授权日：1977-01-04