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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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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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公开(公告)号：US11559768B2
公开(公告)日：2023-01-24
申请号：US16851777
申请日：2020-04-17
申请人： Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Akira Morikawa , Toshio Yamamoto , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
发明人： Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Akira Morikawa , Toshio Yamamoto , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the transient state in which an A/F repeats rich and lean phases. The present disclosure relates to an exhaust gas purification catalyst comprising a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal, a composite oxide containing cerium oxide and zirconium oxide, and a composite oxide containing aluminum oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 20 μm to 100 μm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 μm to 50 μm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein the noble metal is supported on peripheries of the voids, the composite oxide containing the cerium oxide and the zirconium oxide, and the composite oxide containing the aluminum oxide.
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公开(公告)号：US11053833B2
公开(公告)日：2021-07-06
申请号：US16857566
申请日：2020-04-24
申请人： Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Toshio Yamamoto , Akira Morikawa , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
发明人： Isao Chinzei , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Toshio Yamamoto , Akira Morikawa , Satoru Katoh , Takashi Onozuka , Hirotaka Ori , Mitsuyoshi Okada , Sho Hoshino
摘要： The present disclosure provides the exhaust gas purification catalyst with the improved purification performance under the high Ga condition and the atmosphere where the A/F is rich. The present disclosure relates to an exhaust gas purification catalyst including a catalyst coating layer on a substrate, the catalyst coating layer containing a noble metal and a metal oxide, wherein in the catalyst coating layer: an average thickness of the coating layer is in a range from 50 μm to 100 μm; a porosity measured by a weight-in-water method is in a range from 50% by volume to 80% by volume; and high-aspect-ratio pores having an aspect ratio of 5 or more account for 0.5% by volume to 50% by volume of a whole volume of voids, the high-aspect-ratio pore having an equivalent circle diameter in a range from 2 μm to 50 μm in a cross-sectional image of a catalyst coating layer cross section perpendicular to an exhaust gas flow direction of the substrate and having an average aspect ratio in a range from 10 to 50, and wherein when a surface side in contact with an exhaust gas in a thickness direction of the catalyst coating layer is defined as 0% and a side in contact with the substrate is defined as 100%, 80% by mass or more of a total amount of the noble metal is present in a range from 0% to 25% or more and 70% or less.
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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：US10058846B2
公开(公告)日：2018-08-28
申请号：US15663952
申请日：2017-07-31
申请人： Yoshinori Saito , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Takahiro Suzuki , Kosuke Iizuka , Minoru Ito , Ryota Nakashima
发明人： Yoshinori Saito , Masahide Miura , Seiji Nakahigashi , Hiromasa Suzuki , Takahiro Suzuki , Kosuke Iizuka , Minoru Ito , Ryota Nakashima
IPC分类号： B01J23/10 , B01J23/63 , B01J21/06 , B01J35/00 , B01J35/02 , B01J35/04 , B01J20/02 , B01J20/28 , B01J37/02 , B01J20/32 , B01D53/94
CPC分类号： B01J23/10 , B01D53/9445 , B01D53/945 , B01D2255/1023 , B01D2255/1025 , B01D2255/2061 , B01D2255/2063 , B01D2255/2066 , B01D2255/2092 , B01D2255/407 , B01D2255/9022 , B01D2255/908 , B01D2255/9202 , B01J20/0211 , B01J20/0225 , B01J20/28004 , B01J20/3236 , B01J23/63 , B01J35/0006 , B01J35/002 , B01J35/023 , B01J37/0244 , C01G25/00 , Y02T10/22
摘要： An catalyst for purifying exhaust gas comprising an OCS material that has sufficient heat resistance and achieves a favorable balance between the oxygen storage volume and the oxygen absorption/release rate includes an catalyst for purifying exhaust, which has a substrate and a catalyst coating layer formed on the substrate, wherein the catalyst coating layer comprises a ceria-zirconia-based composite oxide having a pyrochlore structure in an amount of 5 to 100 g/L based on the volume of the substrate, the ceria-zirconia-based composite oxide has a secondary particle size (D50) of 3 μm to 7 μm, and the ceria-zirconia-based composite oxide optionally contains praseodymium.
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