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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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公开(公告)号：US10576420B2
公开(公告)日：2020-03-03
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
IPC分类号： B01D53/94 , B01J23/00 , F01N3/10 , C01G25/02 , B01J23/10 , B01J23/63 , B01J35/00 , B01J35/10 , B01J37/00 , B01J37/02 , B01J37/03 , C01F17/00 , B01J37/08 , B01J35/02 , B01J27/053
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：US10384163B2
公开(公告)日：2019-08-20
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
IPC分类号： B01D53/94 , B01J37/02 , B01J37/03 , B01J35/00 , B01J23/00 , B01J23/10 , B01J23/63 , C01G25/02 , C01F17/00 , F01N3/10 , B01J35/10 , B01J37/00 , B01J35/02 , B01J37/08 , B01J27/053
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：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：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：US10143968B2
公开(公告)日：2018-12-04
申请号：US15534805
申请日：2015-12-11
申请人： Hiromasa Suzuki , Takeru Yoshida , Masahide Miura , Isao Chinzei , Mitsuyoshi Okada , Toshitaka Tanabe , Akihiko Suda , Hirotaka Ori , Akiya Chiba , Kosuke Iizuka , Akira Morikawa
发明人： Hiromasa Suzuki , Takeru Yoshida , Masahide Miura , Isao Chinzei , Mitsuyoshi Okada , Toshitaka Tanabe , Akihiko Suda , Hirotaka Ori , Akiya Chiba , Kosuke Iizuka , Akira Morikawa
IPC分类号： B01J23/38 , B01J23/40 , B01J23/42 , B01J23/44 , B01J23/63 , B01J23/10 , B01J35/00 , B01D53/94 , B01J37/02 , B01J37/03 , C04B35/488
摘要： The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, 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 % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.
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公开(公告)号：US10307736B2
公开(公告)日：2019-06-04
申请号：US15936980
申请日：2018-03-27
申请人： Yoshinori Saito , Hiromasa Suzuki , Tatsuya Ohashi , Keiichi Narita , Ryota Nakashima , Mitsuyoshi Okada , Ryosuke Takasu , Shunsuke Oishi
发明人： Yoshinori Saito , Hiromasa Suzuki , Tatsuya Ohashi , Keiichi Narita , Ryota Nakashima , Mitsuyoshi Okada , Ryosuke Takasu , Shunsuke Oishi
IPC分类号： B01J23/42 , B01J23/44 , B01J23/56 , B01J35/00 , B01J23/46 , B01J37/02 , B01J37/08 , B01D53/94 , F01N3/10
摘要： An exhaust gas purification catalyst, excellent in the NOx purification capacity and the HC purification capacity, includes a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer comprises the upper and lower layer including a lower layer being closer to the surface of the substrate and an upper layer being relatively remote from the surface of the substrate. The upper layer of the catalyst coating layer includes Rh, Pd, and a carrier. The lower layer of the catalyst coating layer includes at least one noble metal selected from Pd and Pt and a carrier. 65% by mass or more of Pd in the upper layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the upper layer being relatively remote from the surface of the substrate. The ratio of Pd to Rh by mass (Pd/Rh) is 0.5 to 7.0 in the upper layer.
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公开(公告)号：US10322406B2
公开(公告)日：2019-06-18
申请号：US15534841
申请日：2015-12-11
申请人： 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
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： F01N3/10 , B01D53/94 , B01J23/00 , B01J23/10 , B01J23/63 , B01J35/00 , B01J35/04 , B01J35/10 , B01J37/02 , B01J37/03 , B01J37/08 , C01F17/00 , C01G25/00 , C01G25/02 , B01J27/053
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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公开(公告)号：US10323554B2
公开(公告)日：2019-06-18
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
IPC分类号： F01N3/00 , F01N3/10 , B01J23/63 , B01D53/94 , B01J35/10 , B01J37/02 , B01J37/00 , B01D53/86 , B01J23/56 , B01J37/04 , F01N3/28 , B01J37/08 , B01J35/02
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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