发明授权
US08067330B2 Catalytic material and catalyst for purifying exhaust gas component
有权
用于净化废气成分的催化材料和催化剂
- 专利标题： Catalytic material and catalyst for purifying exhaust gas component
- 专利标题（中）： 用于净化废气成分的催化材料和催化剂
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申请号： US12068864申请日： 2008-02-12
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公开(公告)号： US08067330B2公开(公告)日： 2011-11-29
- 发明人: Kenji Suzuki , Koichiro Harada , Hiroshi Yamada , Kenji Okamoto , Akihide Takami
- 申请人： Kenji Suzuki , Koichiro Harada , Hiroshi Yamada , Kenji Okamoto , Akihide Takami
- 申请人地址： JP Hiroshima
- 专利权人： Mazda Motor Corporation
- 当前专利权人： Mazda Motor Corporation
- 当前专利权人地址： JP Hiroshima
- 优先权： JP2007-035095 20070215; JP2008-012798 20080123
- 主分类号： B01J23/00
- IPC分类号： B01J23/00 ; B01J23/10 ; B01J23/42 ; B01J23/44
摘要：
Disclosed is a catalytic material for purifying an exhaust gas component. The catalytic material comprises a composite oxide which contains, as essential components, zirconium (Zr) and neodymium (Nd), and further contains a rare-earth metal R other than cerium (Ce) and neodymium (Nd), wherein each of the zirconium, neodymium and rare-earth metal R constituting the composite oxide is contained, in the form of oxide, in such a manner that a ratio of Nd2O3/(ZrO2+Nd2O3+RO) is 3 mol % or more, and a ratio of (Nd2O3+RO)/(ZrO2+Nd2O3+RO) is 33 mol % or less. The catalytic material of the present invention can oxidize/burn PM in a short period of time, while suppressing CO emission during the burning of the PM, and can achieve further enhanced NOx conversion performance.