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公开(公告)号：US11602742B2
公开(公告)日：2023-03-14
申请号：US17178336
申请日：2021-02-18
申请人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Ryota Nakashima , Masatoshi Ikebe , Keisuke Murawaki , Hirotaka Ori
发明人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Ryota Nakashima , Masatoshi Ikebe , Keisuke Murawaki , Hirotaka Ori
IPC分类号： B01J23/40 , B01J23/42 , B01J23/44 , B01J23/46 , B01J35/00 , B01J35/04 , B01D53/94 , B01D46/24 , F01N3/28
摘要： Provided is an exhaust gas purification device that ensures an improved purification performance and a suppressed pressure loss. An exhaust gas purification device of the present disclosure includes a honeycomb substrate and an inflow cell side catalyst layer. disposed on a surface on the inflow cell side in an inflow side region of the partition wall. When a gas permeability coefficient of an inflow side partition wall portion including the inflow side region of the partition wall and the inflow cell side catalyst layer is Ka and a gas permeability coefficient of an outflow side partition wall portion including an outflow side region at least from the predetermined position to an outflow side end of the partition wall is Kb, a ratio Ka/Kb of the gas permeability coefficients is within a range of 0.4 or more and 0.8 or less.
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公开(公告)号：US11660589B2
公开(公告)日：2023-05-30
申请号：US16864340
申请日：2020-05-01
申请人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Masatoshi Ikebe , Ryota Nakashima , Yasutaka Nomura , Hirotaka Ori
发明人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Masatoshi Ikebe , Ryota Nakashima , Yasutaka Nomura , Hirotaka Ori
CPC分类号： B01J35/04 , B01D46/2418 , B01D53/94 , B01J23/42 , B01J23/44 , B01J23/464 , F01N3/0821 , F01N3/281 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/9155
摘要： An exhaust gas purification device that allows suppressing an increase in pressure loss is provided. The exhaust gas purification device of the present disclosure includes a honeycomb substrate and an inflow cell side catalyst layer. The substrate includes a porous partition wall which defines inflow cells and outflow cells extending from an inflow side end to an outflow side end. The inflow cell side catalyst layer is disposed on a surface on the inflow cell side in an inflow cell side catalyst region from an inflow side end to a position close to an outflow side end of the partition wall. The permeability of a portion including an outflow side region from the position to the outflow side end of the partition wall is higher than a gas permeability of a portion including the inflow cell side catalyst region of the partition wall and the inflow cell side catalyst layer.
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公开(公告)号：US11415039B2
公开(公告)日：2022-08-16
申请号：US16851169
申请日：2020-04-17
申请人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Masatoshi Ikebe , Ryota Nakashima , Yasutaka Nomura
发明人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Sato , Masatoshi Ikebe , Ryota Nakashima , Yasutaka Nomura
摘要： There is provided a structure including: a substrate including a first and a second ends, and a porous partition wall defining a first and a second cells extending between the first and the second ends; a first catalyst; and a second catalyst. In a first area, the first catalyst is disposed on a first surface of the partition wall, and the partition wall with the first catalyst disposed on the partition wall is impermeable to gas. In a second area, the first catalyst is not provided, the second catalyst is disposed in a region including at least a part inside the partition wall, the part facing the first cell, and the partition wall with the second catalyst disposed in the partition wall is permeable to gas. In a third area, any of the first catalyst or the second catalyst is not provided, and the partition wall is permeable to gas.
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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：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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