基本信息:
- 专利标题： EXHAUST GAS PURIFICATION CATALYST
- 申请号：US15560772 申请日：2016-03-24
- 公开(公告)号：US20180243690A1 公开(公告)日：2018-08-30
- 发明人： Hiromasa SUZUKI , Masahide MIURA , Yoshinori SAITO , Satoru KATOH , Toshitaka TANABE , Tetsuhiro HIRAO , Tatsuya OHASHI , Hiroaki NAITO , Hirotaka ORI , Michihiko TAKEUCHI , Keiichi NARITA
- 申请人： Hiromasa SUZUKI , Masahide MIURA , Yoshinori SAITO , Satoru KATOH , Toshitaka TANABE , Tetsuhiro HIRAO , Tatsuya OHASHI , Hiroaki NAITO , Hirotaka ORI , Michihiko TAKEUCHI , Keiichi NARITA
- 申请人地址： JP Toyota-shi, Aichi JP Kakegawa-shi, Shizuoka
- 专利权人： TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- 当前专利权人： TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- 当前专利权人地址： JP Toyota-shi, Aichi JP Kakegawa-shi, Shizuoka
- 优先权： JP2015-065504 20150327
- 国际申请： PCT/JP2016/059319 WO 20160324
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01J23/56 ; B01J35/00 ; B01J35/02 ; B01J35/04 ; B01J35/10 ; B01J37/02 ; B01J37/08 ; F01N3/10 ; F01N3/28
摘要：
An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance even under a high Ga condition. The present invention relates to an exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises catalyst particles, the catalyst coating layer having an upstream region extending by 40 to 60% of the entire length of the substrate from an upstream end of the catalyst in the direction of an exhaust gas flow and a downstream region corresponding to the remainder portion of the catalyst coating layer, the composition of the catalyst particle of the upstream region being different from that of the downstream region. The downstream region in the direction of an exhaust gas flow has a structure where a void is included in a large number, and furthermore high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain percentage or more of the whole volume of voids. Thus, the exhaust gas purification catalyst exhibits enhanced purification performance.
公开/授权文献:
- US11224840B2 Exhaust gas purification catalyst 公开/授权日：2022-01-18