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1.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：US11759769B2
公开(公告)日：2023-09-19
申请号：US17495881
申请日：2021-10-07
申请人： Isao Chinzei , Seiji Nakahigashi , Takumi Tojo , Masahide Miura , Nobuyuki Takagi , Yoshiteru Yazawa , Sho Hoshino , Minoru Ito , Naoto Fujita , Tomomasa Aikawa
发明人： Isao Chinzei , Seiji Nakahigashi , Takumi Tojo , Masahide Miura , Nobuyuki Takagi , Yoshiteru Yazawa , Sho Hoshino , Minoru Ito , Naoto Fujita , Tomomasa Aikawa
CPC分类号： B01J23/58 , B01D53/945 , B01J35/04 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/2042 , B01D2255/9155 , F01N3/2803 , F01N2370/02
摘要： Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.
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3.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：US20220118428A1
公开(公告)日：2022-04-21
申请号：US17495881
申请日：2021-10-07
申请人： Isao Chinzei , Seiji NAKAHIGASHI , Takumi TOJO , Masahide MIURA , Noboyuki TAKAGI , Yoshiteru YAZAWA , Sho HOSHINO , Minoru ITO , Naoto FUJITA , Tomomasa AIKAWA
发明人： Isao CHINZEI , Seiji NAKAHIGASHI , Takumi TOJO , Masahide MIURA , Noboyuki TAKAGI , Yoshiteru YAZAWA , Sho HOSHINO , Minoru ITO , Naoto FUJITA , Tomomasa AIKAWA
摘要： Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.
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公开(公告)号：US11719144B2
公开(公告)日：2023-08-08
申请号：US17121245
申请日：2020-12-14
申请人： Norimichi Shimano , Shogo Shirakawa , Masahide Miura , Isao Chinzei , Seiji Nakahigashi , Hiroki Nihashi , Hiromi Togashi , Tomomasa Aikawa , Isao Naito
发明人： Norimichi Shimano , Shogo Shirakawa , Masahide Miura , Isao Chinzei , Seiji Nakahigashi , Hiroki Nihashi , Hiromi Togashi , Tomomasa Aikawa , Isao Naito
CPC分类号： F01N3/105 , B01J23/42 , B01J23/464 , B01J35/0006 , B01J35/023 , B01J35/026 , B01J37/0215 , F01N2370/02 , F01N2510/0684 , F01N2570/16
摘要： The present disclosure provides an exhaust gas purification catalyst having improved durability, 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 downstream portion contains Rh fine particles, and 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.
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公开(公告)号：US20210199037A1
公开(公告)日：2021-07-01
申请号：US17121245
申请日：2020-12-14
申请人： Norimichi Shimano , Shogo Shirakawa , Masahide Miura , Isao Chinzei , Seiji Nakahigashi , Hiroki Nihashi , Hiromi Togashi , Tomomasa Aikawa , Isao Naito
发明人： Norimichi Shimano , Shogo Shirakawa , Masahide Miura , Isao Chinzei , Seiji Nakahigashi , Hiroki Nihashi , Hiromi Togashi , Tomomasa Aikawa , Isao Naito
摘要： The present disclosure provides an exhaust gas purification catalyst having improved durability, 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 downstream portion contains Rh fine particles, and 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 a of the particle size of 0.8 nm or less.
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7.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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