发明授权
- 专利标题： Catalyst for exhaust gas purification, process for producing the same, and method of purifying exhaust gas
- 专利标题（中）： 废气净化用催化剂，其制造方法以及排气净化方法
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申请号： US09701737申请日： 2000-12-04
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公开(公告)号： US06806225B1公开(公告)日： 2004-10-19
- 发明人: Yasuo Ikeda , Hiroshi Hirayama , Riemi Tanizawa , Sinji Tsuji
- 申请人： Yasuo Ikeda , Hiroshi Hirayama , Riemi Tanizawa , Sinji Tsuji
- 优先权： JP10-184574 19980630
- 主分类号： B01J2346
- IPC分类号： B01J2346
摘要：
An NOx storage member including at least one member selected from the group consisting of alkali metals, alkaline-earth metals and rare-earth elements, and at least one noble metal selected from the group consisting of Pt, Pd and Rh are loaded on a support including a porous oxide including TiO2 at least and ZrO2 on which Rh is loaded in advance. H2, which is generated by Rh/ZrO2, inhibits the sulfur poisoning, and the support, which includes TiO2 at least, secures the initial NOx purifying capability, thereby further inhibiting the sulfur poisoning. Accordingly, it is possible to inhibit the NOx storage member from the sulfur poisoning, and to maintain a high NOx conversion even after a durability test.
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