- 专利标题： CATALYST FOR EXHAUST GAS PURIFICATION
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申请号： EP17766628.6申请日： 2017-03-13
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公开(公告)号： EP3427824A1公开(公告)日： 2019-01-16
- 发明人: ONOE, Ryota , ITO, Kazuhiko , HARADA, Takahiro , KASUYA, Chihiro
- 申请人： Cataler Corporation
- 申请人地址： 7800, Chihama Kakegawa-shi Shizuoka 437-1492 JP
- 专利权人： Cataler Corporation
- 当前专利权人： Cataler Corporation
- 当前专利权人地址： 7800, Chihama Kakegawa-shi Shizuoka 437-1492 JP
- 代理机构： Kramer Barske Schmidtchen Patentanwälte PartG mbB
- 优先权： JP2016054840 20160318
- 国际公布： WO2017159628 20170921
- 主分类号： B01J23/63
- IPC分类号： B01J23/63 ; B01D53/94 ; B01J35/04 ; F01N3/10 ; F01N3/28
摘要：
Provided is an exhaust gas purification catalyst of OSC material-containing type that allows a favorable HC purification (oxidation) treatment to be performed even in a case where HC emissions are comparatively large, such as during engine startup.
The exhaust gas purification catalyst of the present invention includes, as a catalyst layer (20), a front section (24) positioned upstream in an exhaust gas flow direction, and a rear section (26) positioned downstream of the front section in the exhaust gas flow direction. The front section contains Pd as a catalyst metal but does not contain an OSC material.
The proportion, at which the front section is formed from the upstream leading end in the exhaust gas flow direction, is 10% to 40% with respect to 100% of a total length of the substrate (1) in the exhaust gas flow direction.
The exhaust gas purification catalyst of the present invention includes, as a catalyst layer (20), a front section (24) positioned upstream in an exhaust gas flow direction, and a rear section (26) positioned downstream of the front section in the exhaust gas flow direction. The front section contains Pd as a catalyst metal but does not contain an OSC material.
The proportion, at which the front section is formed from the upstream leading end in the exhaust gas flow direction, is 10% to 40% with respect to 100% of a total length of the substrate (1) in the exhaust gas flow direction.
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