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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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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：US20210197176A1
公开(公告)日：2021-07-01
申请号：US17107224
申请日：2020-11-30
申请人： Isao CHINZEI , Seiji NAKAHIGASHI , Shogo SHIRAKAWA , Hiromasa SUZUKI , Masahide MIURA , Takahiro NISHIO , Norimichi SHIMANO , Hiroki NIHASHI , Hiromi TOGASHI , Mitsuyoshi OKADA , Takashi ONOZUKA , Souta AKIYAMA , Isao NAITO
发明人： Isao CHINZEI , Seiji NAKAHIGASHI , Shogo SHIRAKAWA , Hiromasa SUZUKI , Masahide MIURA , Takahiro NISHIO , Norimichi SHIMANO , Hiroki NIHASHI , Hiromi TOGASHI , Mitsuyoshi OKADA , Takashi ONOZUKA , Souta AKIYAMA , Isao NAITO
摘要： The present disclosure provides an exhaust gas purification catalyst having an improved low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, 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, and wherein the Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.
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公开(公告)号：US20180236401A1
公开(公告)日：2018-08-23
申请号：US15534794
申请日：2015-12-11
申请人： Isao CHINZEI , Hiromasa SUZUKI , Takeru YOSHIDA , Masahide MIURA , Yuki AOKI , Mitsuyoshi OKADA , Toshitaka TANABE , Akihiko SUDA , Yoshinori SAITO , Hirotaka ORI , Kosuke IIZUKA , Akira MORIKAWA
发明人： Isao CHINZEI , Hiromasa SUZUKI , Takeru YOSHIDA , Masahide MIURA , Yuki AOKI , Mitsuyoshi OKADA , Toshitaka TANABE , Akihiko SUDA , Yoshinori SAITO , Hirotaka ORI , Kosuke IIZUKA , Akira MORIKAWA
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 lower layer of the 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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公开(公告)号：US20180065111A1
公开(公告)日：2018-03-08
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 , B01J35/02 , B01J20/02 , B01J20/28 , B01J23/63 , B01J37/02 , B01J20/32 , B01J35/00 , 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
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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公开(公告)号：US20180106174A1
公开(公告)日：2018-04-19
申请号：US15560703
申请日：2016-03-24
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
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
CPC分类号： F01N3/101 , B01D53/865 , B01D53/94 , B01D53/945 , B01D53/9477 , B01D2255/1021 , B01D2255/1025 , B01D2255/407 , B01D2255/9022 , B01D2255/9205 , B01J23/56 , B01J23/63 , B01J35/023 , B01J35/026 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/0219 , B01J37/0234 , B01J37/04 , B01J37/08 , F01N3/2825 , F01N2330/06 , F01N2330/34 , Y02T10/22
摘要： The present invention is directed to address the following problem: in an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst, reduction in the gas diffusivity of the underfloor catalyst results in reduction in the use efficiency of a catalytic active site, resulting in reduction in purification performance. The present invention relates to an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst having a catalyst coating where a large number of voids are included, wherein high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain rate or more of the whole volume of the voids, to thereby enhance the purification performance of the catalyst.
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公开(公告)号：US20180104679A1
公开(公告)日：2018-04-19
申请号：US15560706
申请日：2016-03-24
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
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
CPC分类号： B01J37/0217 , B01D53/94 , B01D53/945 , B01D2255/10 , B01D2255/9022 , B01D2255/9202 , B01D2255/9205 , B01J23/54 , B01J23/63 , B01J35/023 , B01J35/026 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/02 , B01J37/0219 , B01J37/0221 , B01J37/0234 , B01J37/0244 , B01J37/08 , F01N3/28 , Y02T10/22
摘要： When the amount of coating is increased in a two-layer catalyst or the like containing two noble metals in respective different layers, gas diffusivity in the catalyst and use efficiency of a catalytic active site are reduced to thereby reduce purification performance. In view of this, an organic fiber having a predetermined shape is used as a pore-forming material in formation of an uppermost catalyst coating layer of a multi-layer catalyst, to thereby form an uppermost catalyst coating layer having a high-aspect-ratio pore excellent in connectivity and therefore excellent gas diffusivity.
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公开(公告)号：US20180252132A1
公开(公告)日：2018-09-06
申请号：US15560625
申请日：2016-03-24
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
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
摘要： An object of the present invention is to provide an exhaust gas purification catalyst which can exhibit high durability and warm-up performance. 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 upstream 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.
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公开(公告)号：US20180243690A1
公开(公告)日：2018-08-30
申请号：US15560772
申请日：2016-03-24
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
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
IPC分类号： B01D53/94 , B01J23/56 , B01J35/00 , B01J35/02 , B01J35/04 , B01J35/10 , B01J37/02 , B01J37/08 , F01N3/10 , F01N3/28
CPC分类号： B01D53/945 , B01D53/94 , B01D53/9468 , B01D53/9472 , B01D2255/10 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/2063 , B01D2255/407 , B01D2255/9022 , B01D2255/9032 , B01D2255/9202 , B01D2255/9205 , B01J23/56 , B01J23/63 , B01J35/0006 , B01J35/023 , B01J35/026 , B01J35/04 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/0219 , B01J37/0234 , B01J37/0244 , B01J37/08 , F01N3/101 , F01N3/28 , F01N2510/0682 , Y02T10/22
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.
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公开(公告)号：US20180106175A1
公开(公告)日：2018-04-19
申请号：US15561738
申请日：2016-03-24
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
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
CPC分类号： F01N3/101 , B01D53/865 , B01D53/94 , B01D53/945 , B01D2255/10 , B01D2255/9022 , B01D2255/9202 , B01D2255/9205 , B01J23/56 , B01J23/63 , B01J35/023 , B01J35/026 , B01J35/10 , B01J35/1076 , B01J35/108 , B01J37/0018 , B01J37/0036 , B01J37/0219 , B01J37/0234 , B01J37/0244 , B01J37/04 , B01J37/08 , F01N3/28 , Y02T10/22
摘要： The problem of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance under a high Ga condition while having a resistance to stress such as high-temperature and poisonous substances. The present invention relates to an exhaust gas purification catalyst comprising two or more catalyst coating layers on a substrate, wherein a lower catalyst coating layer that is present lower with respect to an uppermost catalyst coating layer has a structure where a large number of voids are included and high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain proportion or more of the whole volume of voids, thereby to improve gas diffusivity in the lower catalyst coating layer.
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