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公开(公告)号：US20240139716A1
公开(公告)日：2024-05-02
申请号：US18488353
申请日：2023-10-17
申请人： Takahiro NISHIO , Nobuyuki Takagl , Takumi Tojo , Shogo Shirakawa , Kengo Shimizu , Sho Hoshino , Shun Sakamoto , Yosuke Toda
发明人： Takahiro NISHIO , Nobuyuki Takagl , Takumi Tojo , Shogo Shirakawa , Kengo Shimizu , Sho Hoshino , Shun Sakamoto , Yosuke Toda
IPC分类号： B01J23/56
CPC分类号： B01J23/56 , B01J2523/822 , B01J2523/824 , B01J2523/828
摘要： Provided is an exhaust gas purification catalyst providing a catalyst performance and an OSC performance at the same time even at low temperature. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt and a second catalyst coating layer containing Rh. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes an upstream coating layer and a downstream coating layer. Rh in the upstream coating layer and the downstream coating layer are supported on specific carrier particles. Further, a particle diameter of Rh is controlled.
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2.发明公开公开(公告)号：US20230372917A1
公开(公告)日：2023-11-23
申请号：US18318238
申请日：2023-05-16
申请人： Takahiro NISHIO , Shogo Shirakawa , Hiroki Shirakawa , Nobuyuki Takagi , Tomomasa Aikawa , Hiroki Nihashi , Takahiro Noguchi
发明人： Takahiro NISHIO , Shogo Shirakawa , Hiroki Shirakawa , Nobuyuki Takagi , Tomomasa Aikawa , Hiroki Nihashi , Takahiro Noguchi
IPC分类号： B01J35/00 , B01J23/46 , B01J23/58 , B01J23/10 , B01J37/02 , B01J37/08 , B01D53/94 , F01N3/28
CPC分类号： B01J35/0006 , B01J35/0013 , B01J35/006 , B01J23/464 , B01J23/58 , B01J23/10 , B01J37/0201 , B01J37/0215 , B01J37/0236 , B01J37/0248 , B01J37/088 , B01D53/9472 , F01N3/2825 , B01D2255/1025 , B01D2255/1023 , B01D2255/9202 , B01D2255/2042 , B01D2255/908 , B01D2257/404 , B01D2255/407 , B01D2255/20715 , B01D2255/2065 , B01D2257/702 , B01D2258/01 , F01N2370/02 , F01N2510/068
摘要： The exhaust gas purification device includes: a substrate including an upstream end through which an exhaust gas is introduced and a downstream end through which the exhaust gas is discharged; a first catalyst layer containing a rhodium-containing catalyst containing a metal oxide carrier and rhodium particles supported on the metal oxide carrier, the first catalyst layer extending across a first region; and a second catalyst layer containing palladium particles and a material having a basicity higher than a basicity of the metal oxide carrier, the second catalyst layer extending across a second region. A mean of a particle size distribution of the rhodium particles is from 1.5 nm to 18 nm.
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公开(公告)号：US11577226B2
公开(公告)日：2023-02-14
申请号：US17107997
申请日：2020-12-01
申请人： Seiji Nakahigashi , Isao Chinzei , Shogo Shirakawa , Hiromasa Suzuki , Masahide Miura , Takahiro Nishio , Norimichi Shimano , Hiroki Nihashi , Mitsuyoshi Okada , Takashi Onozuka , Souta Akiyama , Hiromi Togashi , Takahiro Noguchi , Isao Naito
发明人： Seiji Nakahigashi , Isao Chinzei , Shogo Shirakawa , Hiromasa Suzuki , Masahide Miura , Takahiro Nishio , Norimichi Shimano , Hiroki Nihashi , Mitsuyoshi Okada , Takashi Onozuka , Souta Akiyama , Hiromi Togashi , Takahiro Noguchi , Isao Naito
摘要： The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.
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公开(公告)号：US20230405569A1
公开(公告)日：2023-12-21
申请号：US18337103
申请日：2023-06-19
申请人： Takahiro NISHIO , Shogo SHIRAKAWA , Takumi TOJO , Nobuyuki TAKAGI , Yosuke TODA , Sho HOSHINO , Shun SAKAMOTO
发明人： Takahiro NISHIO , Shogo SHIRAKAWA , Takumi TOJO , Nobuyuki TAKAGI , Yosuke TODA , Sho HOSHINO , Shun SAKAMOTO
CPC分类号： B01J35/0006 , B01J23/464 , B01J23/44 , B01J23/42 , B01J23/10 , B01D53/9472 , F01N3/2828 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/908 , B01D2255/9207 , B01D2255/407 , B01D2255/2092 , B01D2255/20715 , B01D2255/2065 , B01D2258/012 , B01D2257/404 , B01D2257/702 , B01D2255/9035 , B01D2255/9032 , F01N2370/02
摘要： Provided is an exhaust gas purification catalyst having a catalyst performance and an OSC performance in a compatible manner in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The exhaust gas purification catalyst includes a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer includes a first catalyst coating layer containing Pd and/or Pt as a catalyst metal and a second catalyst coating layer containing Rh as a catalyst metal. The first catalyst coating layer is formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst. The second catalyst coating layer includes a high specific surface area OSC material having a specific surface area of more than 40 m2/g, a medium specific surface area OSC material having a specific surface area of 4 m2/g to 40 m2/g, and a low specific surface area OSC material having a specific surface area of less than 4 m2/g.
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5.发明公开公开(公告)号：US20230372907A1
公开(公告)日：2023-11-23
申请号：US18318099
申请日：2023-05-16
申请人： Takahiro NISHIO , Shogo SHIRAKAWA , Nobuyuki TAKAGI , Tomomasa AIKAWA , Hiroki NIHASHI , Takahiro NOGUCHI
发明人： Takahiro NISHIO , Shogo SHIRAKAWA , Nobuyuki TAKAGI , Tomomasa AIKAWA , Hiroki NIHASHI , Takahiro NOGUCHI
CPC分类号： B01J23/464 , B01J37/0201 , B01J37/0236 , B01J37/08 , B01J35/023 , B01D53/94 , B01D2255/1025 , B01D2258/01
摘要： Provided are a method for producing an exhaust gas purification material and a method for manufacturing an exhaust gas purification device that allow efficient removal of a harmful component even after exposure to a high temperature environment. The method for producing the exhaust gas purification material includes the steps, in this order, of: (a) impregnating a metal oxide carrier with a rhodium compound solution; (b) drying the metal oxide carrier impregnated with the rhodium compound solution to obtain a rhodium-containing catalyst containing the metal oxide carrier and rhodium particles supported on the metal oxide carrier; (c) heating the rhodium-containing catalyst at a temperature within a range from 700° C. to 900° C. under an inert atmosphere; and (d) mixing the rhodium-containing catalyst with a material having a basicity higher than a basicity of the metal oxide carrier.
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公开(公告)号：US20210205790A1
公开(公告)日：2021-07-08
申请号：US17107997
申请日：2020-12-01
申请人： Seiji NAKAHIGASHI , Isao CHINZEI , Shogo SHIRAKAWA , Hiromasa SUZUKI , Masahide MIURA , Takahiro NISHIO , Norimichi SHIMANO , Hiroki NIHASHI , Mitsuyoshi OKADA , Takashi ONOZUKA , Souta AKIYAMA , Hiromi TOGASHI , Takahiro NOGUCHI , Isao NAITO
发明人： Seiji NAKAHIGASHI , Isao CHINZEI , Shogo SHIRAKAWA , Hiromasa SUZUKI , Masahide MIURA , Takahiro NISHIO , Norimichi SHIMANO , Hiroki NIHASHI , Mitsuyoshi OKADA , Takashi ONOZUKA , Souta AKIYAMA , Hiromi TOGASHI , Takahiro NOGUCHI , Isao NAITO
摘要： The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.
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公开(公告)号：US11795855B2
公开(公告)日：2023-10-24
申请号：US17211112
申请日：2021-03-24
申请人： Isao Chinzei , Takahiro Nishio , Shogo Shirakawa , Masahide Miura , Hiromasa Suzuki , Yuki Kido , Minoru Ito , Sho Hoshino , Shin Nakayama
发明人： Isao Chinzei , Takahiro Nishio , Shogo Shirakawa , Masahide Miura , Hiromasa Suzuki , Yuki Kido , Minoru Ito , Sho Hoshino , Shin Nakayama
CPC分类号： F01N3/2803 , B01J21/14 , B01J23/44 , B01J23/464 , B01J35/0006 , B01J35/023 , F01N2370/02 , F01N2510/0684
摘要： Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.
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公开(公告)号：US20210301706A1
公开(公告)日：2021-09-30
申请号：US17211112
申请日：2021-03-24
申请人： Isao CHINZEI , Takahiro NISHIO , Shogo SHIRAKAWA , Masahide MIURA , Hiromasa SUZUKI , Yuki KIDO , Minoru ITO , Sho HOSHINO , Shin NAKAYAMA
发明人： Isao CHINZEI , Takahiro NISHIO , Shogo SHIRAKAWA , Masahide MIURA , Hiromasa SUZUKI , Yuki KIDO , Minoru ITO , Sho HOSHINO , Shin NAKAYAMA
摘要： Provided is an exhaust gas purification catalyst capable of reducing a noble metal amount while maintaining a catalyst performance, which comprises a substrate and at least three catalyst coating layers formed on the substrate, the first and third catalyst coating layers contain Pd as a catalyst metal and are formed in a range of a predetermined length from an upstream end surface in an exhaust gas flow direction, and the second catalyst coating layer contains Rh as a catalyst metal and is formed in a range of a predetermined length from a downstream end surface in the exhaust gas flow direction.
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9.发明公开公开(公告)号：US20240017246A1
公开(公告)日：2024-01-18
申请号：US18318277
申请日：2023-05-16
申请人： Takahiro NISHIO , Shogo Shirakawa , Hiroki Shirakawa , Nobuyuki Takagi , Tomomasa Aikawa , Hiroki Nihashi , Takahiro Noguchi
发明人： Takahiro NISHIO , Shogo Shirakawa , Hiroki Shirakawa , Nobuyuki Takagi , Tomomasa Aikawa , Hiroki Nihashi , Takahiro Noguchi
IPC分类号： B01J23/58 , B01J23/46 , B01J23/10 , B01J21/04 , B01J35/00 , B01J35/04 , B01J37/02 , B01J37/08 , B01D53/94 , F01N3/28
CPC分类号： B01J23/58 , F01N2330/06 , B01J23/10 , B01J21/04 , B01J35/0006 , B01J35/006 , B01J35/0013 , B01J35/04 , B01J37/0244 , B01J37/0248 , B01J37/0228 , B01J37/0205 , B01J37/0236 , B01J37/088 , B01D53/9472 , F01N3/2828 , B01D2255/1025 , B01D2255/2065 , B01D2255/9202 , B01D2255/1023 , B01D2255/9032 , B01D2255/2042 , B01D2259/4566 , F01N2370/02 , F01N2330/32 , B01J23/464
摘要： The exhaust gas purification device includes: a substrate including an upstream and a downstream ends; a first catalyst layer extending across a first region and containing a first rhodium-containing catalyst and a first cerium-containing oxide, the first rhodium-containing catalyst containing a first metal oxide carrier and first rhodium particles supported on the first metal oxide carrier, a mean of a particle size distribution of the first rhodium particles being 1.5 nm to 18 nm; and a second catalyst layer extending across a second region and containing a second rhodium-containing catalyst containing a second metal oxide carrier and second rhodium particles supported on the second metal oxide carrier, a cerium content in the first catalyst layer based on a volume capacity of the substrate in the first region being higher than a cerium content in the second catalyst layer based on a volume capacity of the substrate in the second region.
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公开(公告)号：US11725556B2
公开(公告)日：2023-08-15
申请号：US17682646
申请日：2022-02-28
申请人： Isao Chinzei , Takumi Tojo , Takahiro Nishio , Yosuke Toda , Hirotaka Ori , Minoru Ito , Sho Hoshino
发明人： Isao Chinzei , Takumi Tojo , Takahiro Nishio , Yosuke Toda , Hirotaka Ori , Minoru Ito , Sho Hoshino
IPC分类号： B01J21/04 , B01J21/06 , B01J23/02 , B01J23/10 , B01J23/42 , B01J23/44 , B01J23/46 , B01J23/56 , B01J23/58 , B01J23/63 , B01J35/04 , F01N3/10
CPC分类号： F01N3/105 , B01J21/04 , B01J21/066 , B01J23/10 , B01J23/42 , B01J23/44 , B01J23/464 , F01N3/101 , F01N2330/02 , F01N2370/02 , F01N2430/06
摘要： Provided is an exhaust gas purification catalyst having an improved catalyst performance while securing an OSC in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer has an upstream coat layer formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst and a downstream coat layer formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst. The downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal.
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