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公开(公告)号：US20180021726A1
公开(公告)日：2018-01-25
申请号：US15550078
申请日：2016-02-16
发明人： Ryota ONOE , Shingo SAKAGAMI , Yasutaka NOMURA , Yuta MORISHITA , Junji KURIYAMA , Hiroshi SEKINE , Daisuke OCHIAI , Naoto MIYOSHI , Masahiko TAKEUCHI , Akemi SATO
CPC分类号： B01D53/945 , B01D53/94 , B01D2255/1023 , B01D2255/1025 , B01D2255/9022 , B01D2255/908 , B01D2255/9155 , B01J23/63 , B01J35/0006 , B01J35/04 , F01N3/0222 , F01N3/035 , F01N3/0864 , F01N3/10 , F01N3/281 , F01N2330/02 , F01N2510/0682 , F01N2510/0684
摘要： A wall-flow-type exhaust gas purification catalyst with an oxygen storage material that has an increased OSC and exhibits its OSC without a compromise provides an exhaust gas purification catalyst having a wall-flow-type substrate, a first catalytic layer and a second catalytic layer. The first catalytic layer is provided to an internal portion of a partition wall in contact with an entrance cell. The second catalytic layer is provided to an internal portion of a partition wall in contact with an exit cell. Each of the first and second catalytic layers has an oxygen storage material. The ratio (D1/D2) of the coating density D1 of the first catalytic layer to the coating density D2 of the second catalytic layer is 1.1 to 1.8.
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公开(公告)号：US20180028972A1
公开(公告)日：2018-02-01
申请号：US15550070
申请日：2016-02-16
发明人： Ichiro KITAMURA , Keiichi NARITA , Yasutaka NOMURA , Ryota ONOE , Yuta MORISHITA , Junji KURIYAMA , Hiroshi SEKINE , Akihito INOUE , Daisuke OCHIAI , Jun SAWADA , Naoto MIYOSHI , Masahiko TAKEUCHI , Akemi SATO , Atsushi TANAKA
摘要： Provided is an exhaust gas purification catalyst that combines reduction of pressure loss and enhancement of purification performance. This invention provides an exhaust gas purification catalyst comprising a wall-flow-type substrate and first and second catalytic layers. The first catalytic layer is provided to the interior of a partition wall, in contact with an entrance cell, from an exhaust inlet-side end in the running direction, having a length L1 less than Lw. The second catalytic layer is provided to the interior of a partition wall, in contact with an exit cell, from an exhaust outlet-side end in the running direction, having a length L2 less than Lw. An internal portion of partition wall in contact with entrance cell has a substrate-exposing segment near the exhaust outlet-side end.
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公开(公告)号：US20170298797A1
公开(公告)日：2017-10-19
申请号：US15518011
申请日：2015-10-07
发明人： Ryota ONOE , Shingo SAKAGAMI , Tsuyoshi ITO , Yuta MORISHITA , Masahiko TAKEUCHI , Naoto MIYOSHI , Akemi SATO , Daisuke OCHIAI
CPC分类号： F01N3/28 , B01D53/94 , B01D2255/9155 , B01D2255/9202 , B01J23/42 , B01J23/464 , B01J35/04 , B01J35/10 , F01N3/0222 , F01N3/035 , F01N3/2828 , F01N2370/02 , F01N2510/0682
摘要： An exhaust gas purification catalyst having an excellent exhaust partition ability while reducing the increase in pressure loss. Exhaust gas purification catalyst includes a substrate having a wall-flow structure with partition wall, upstream coating section formed in portions of partition wall facing entrance cell, from exhaust inlet-side end in the extending direction of partition wall, and downstream coating section formed in portions of partition wall facing exit cell, from exhaust outlet-side end in the extending direction, having a length shorter than the entire length Lw of the partition wall. In downstream coating section, a catalytic metal is concentrated in the surface layer in contact with exit cell.
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公开(公告)号：US20160074836A1
公开(公告)日：2016-03-17
申请号：US14785028
申请日：2014-04-15
发明人： Yasuyoshi SASAKI , Makoto TSUJI , Hiroto IMAI , Keisuke KISHITA , Daisuke OCHIAI
CPC分类号： B01J23/58 , B01D53/945 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/91 , B01D2258/014 , B01J23/44 , B01J35/0073 , B01J35/04 , B01J37/0244 , B01J37/0248 , F01N3/2803 , Y02T10/22
摘要： The object of the present invention is to provide a novel exhaust gas purifying catalyst having excellent NOx purification performance. The object can be achieved by an exhaust gas purifying catalyst comprising: a substrate; and a catalyst layer disposed on the substrate which comprises a first carrier, and platinum and a first palladium supported on the first carrier; in which the weight ratio of the platinum to the first palladium is 3:1 to 8:1.
摘要翻译： 本发明的目的是提供一种具有优异的NOx净化性能的新型废气净化催化剂。 该目的可以通过一种废气净化催化剂来实现，该催化剂包括：基材; 以及催化剂层，其设置在所述基板上，所述催化剂层包括第一载体，铂和负载在所述第一载体上的第一钯; 其中铂与第一钯的重量比为3:1至8:1。
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公开(公告)号：US20170348674A1
公开(公告)日：2017-12-07
申请号：US15534841
申请日：2015-12-11
发明人： Hiromasa SUZUKI , Takeru YOSHIDA , Masahide MIURA , Yuki AOKI , Isao CHINZEI , Yoshinori SAITO , Daisuke OCHIAI , Mitsuyoshi OKADA , Toshitaka TANABE , Akihiko SUDA , Masanao SATO , Akiya CHIBA , Akira MORIKAWA , Hirotaka ORI
IPC分类号： B01J23/63 , B01J37/03 , B01J37/08 , F01N3/10 , B01J35/04 , B01J23/00 , B01J35/00 , B01J37/02 , B01D53/94
摘要： The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the top layer of a catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.
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