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公开(公告)号：US20230249159A1
公开(公告)日：2023-08-10
申请号：US18011940
申请日：2021-06-28
申请人： Cataler Corporation
发明人： Ryosuke Takasu , Shunsuke Oishi , Takaya Ota
CPC分类号： B01J23/63 , B01J35/1061 , B01J35/1038 , B01J35/1042 , B01J35/04 , B01D53/94 , F01N3/2828 , B01D2258/012 , B01D2255/9202 , B01D2255/2065 , B01D2255/9022 , B01D2255/1025 , B01D2255/1023 , F01N2370/02
摘要： An exhaust gas purification catalyst showing resistance to peeling and high purification performance is provided. The present invention is an exhaust gas purification catalyst including a base material and a catalyst layer disposed on the base material. The catalyst layer includes a catalytic metal, a first metal oxide, and a second metal oxide having a higher heat resistance than that of the first metal oxide. When Dx is an area-based average particle diameter of the first metal oxide determined from an arbitrary cross section of the catalyst layer and Dy is an area-based particle diameter of the second metal oxide 22 measured from the cross section of the catalyst layer, a ratio of the Dy to the Dx (Dy/Dx) is 5 or more, and the Dy is 7 μm or more. In the catalyst layer, pore volume of pores having pore diameters 30 nm or more measured by a nitrogen adsorption method is 0.28 cm3/g or more.
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公开(公告)号：US11607672B2
公开(公告)日：2023-03-21
申请号：US17861320
申请日：2022-07-11
发明人： Shunsuke Oishi , Takaya Ota , Yoshinori Saito , Seiji Nakahigashi , Isao Chinzei , Hiromasa Suzuki
摘要： Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 μm in the depth direction from an outermost surface of the upper layer.
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公开(公告)号：US11473472B2
公开(公告)日：2022-10-18
申请号：US17231474
申请日：2021-04-15
发明人： Koji Sugiura , Hiromasa Nishioka , Naoto Miyoshi , Akemi Satou , Keisuke Murawaki , Masatoshi Ikebe , Takaya Ota , Ryota Nakashima , Hirotaka Ori
摘要： An exhaust gas control apparatus includes a honeycomb substrate and an inlet cell-side catalyst layer. The honeycomb substrate includes a porous partition wall that defines a plurality of cells extending from an inlet-side end face to an outlet-side end face. The cells include an inlet cell and an outlet cell that are adjacent to each other with the partition wall therebetween. The inlet cell is open at its inlet-side end and is sealed at its outlet-side end. The outlet cell is sealed at its inlet-side end and is open at its outlet-side end. The inlet cell-side catalyst layer is provided on a surface on the inlet cell side of the partition wall and extends from an inlet-side end of the partition wall. Porosity of the inlet cell-side catalyst layer is in a specific range.
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公开(公告)号：US10814311B2
公开(公告)日：2020-10-27
申请号：US16329630
申请日：2017-09-19
申请人： CATALER CORPORATION
发明人： Sho Hoshino , Yuki Takesue , Ryota Onoe , Taku Miura , Takaya Ota
IPC分类号： B01J23/10 , B01J23/44 , B01J23/63 , B01J35/00 , B01J35/04 , F01N3/022 , F01N3/035 , F01N3/10 , F01N3/24 , F01N3/28 , B01D53/94 , B01J23/46 , B01J37/02 , F01N3/021
摘要： An exhaust gas purifying catalyst includes a catalyst layer formed inside a partition wall of a base material having a wall flow structure, and has an upstream-side and a downstream-side catalyst layer. The upstream-side catalyst layer includes Rh and a Ce-containing oxide, and the downstream-side catalyst layer includes Pd and a Ce-containing oxide. The mass of the catalyst layer per unit volume of the base material is from 105 g/L to 210 g/L, the mass of the upstream-side catalyst layer per unit volume in an upstream-side portion is from 50 g/L to 100 g/L, the mass of the downstream-side catalyst layer per unit volume in a downstream-side portion is from 100 g/L to 150 g/L, the Ce amount per unit volume of the base material is from 14 g/L to 35 g/L, and the Ce amount per unit volume in the upstream-side portion is from 5 g/L to 20 g/L.
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公开(公告)号：US10413885B2
公开(公告)日：2019-09-17
申请号：US16151847
申请日：2018-10-04
摘要： The exemplary embodiments relate to an exhaust gas purification catalyst that is excellent in terms of HC purification capacity and warm-up performance. Such exhaust gas purification catalyst comprises a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer comprises an upper and lower layer comprising 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 comprises Rh, Pd, and a carrier, the upper layer of the catalyst coating layer comprises an uppermost surface Pd layer having a Pd concentration relatively higher than that in any other portion in the upper layer within an area extending over a length of 20 mm or more from one end on the upstream side in the downstream direction on the surface of the upper layer, the lower layer of the catalyst coating layer comprises at least one noble metal selected from Pd and Pt and a carrier, and 60% or more of Pd by mass in the uppermost surface Pd layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the uppermost surface Pd layer being relatively remote from the surface of the substrate.
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公开(公告)号：US11633724B2
公开(公告)日：2023-04-25
申请号：US17861320
申请日：2022-07-11
发明人： Shunsuke Oishi , Takaya Ota , Yoshinori Saito , Seiji Nakahigashi , Isao Chinzei , Hiromasa Suzuki
摘要： Methods for exhaust gas purification, including the steps of: attaching an exhaust gas purification catalyst to an exhaust system of an internal combustion engine, and supplying an exhaust gas to the exhaust gas purification catalyst, where the exhaust gas purification catalyst includes an upper layer containing first carrier particles which are particles of an inorganic oxide and rhodium, and a lower layer containing second carrier particles which are particles of an inorganic oxide, the upper layer includes a rhodium-rich portion near the surface of the upper layer on the upstream side of the exhaust gas flow, and the existence range of the rhodium-rich portion is in a range of greater than 50% to 80% of the length of the upper layer from a downstream side end of an exhaust gas flow and of less than 20 μm in the depth direction from an outermost surface of the upper layer.
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公开(公告)号：US20230078076A1
公开(公告)日：2023-03-16
申请号：US17801091
申请日：2020-12-07
申请人： Cataler Corporation
发明人： Shunsuke Oishi , Takaya Ota , Taku Miura , Hiromi Togashi , Ryosuke Takasu
摘要： In accordance with the technology herein disclosed, an exhaust gas purification catalyst exhibiting a high exhaust gas purifying performance using a new rare earth-containing material is provided. The exhaust gas purification catalyst herein disclosed includes a base material and a catalyst layer formed on the surface of the base material. The catalyst layer of such an exhaust gas purification catalyst includes rare earth-carrying alumina 50 including a primary particle of a rare earth particle 40 including at least one rare earth element carried on the surface of an alumina carrier 30 including alumina, and the average particle diameter D50 based on TEM observation of the rare earth particle 40 in the rare earth-carrying alumina 50 is 10 nm or less. As a result of this, it is possible to provide an exhaust gas purification catalyst having high NOx adsorption performance and CO adsorption performance
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公开(公告)号：US11524285B2
公开(公告)日：2022-12-13
申请号：US16970667
申请日：2019-01-25
发明人： Shunsuke Oishi , Takaya Ota , Isao Chinzei , Hiromasa Suzuki , Yoshinori Saito , Seiji Nakahigashi
摘要： The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 μm in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.
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公开(公告)号：US20220297094A1
公开(公告)日：2022-09-22
申请号：US17638909
申请日：2020-07-30
申请人： Cataler Corporation
发明人： Takaya Ota , Shunsuke Oishi , Ryosuke Takasu
摘要： The present invention provides an exhaust gas purification catalyst including a base material 11 and a catalyst layer 20 provided on the base material 11. The catalyst layer 20 includes: a catalyst metal; and a carrying material 21 carrying the catalyst metal. The carrying material 21 includes: an OSC material 22 having an oxygen storage capacity; and a carrier 23 other than the OSC material. The OSC material 22 has a mean particle diameter Dx of 1.5 μm or more which is larger than the mean particle diameter Dy of the carrier 23 other than the OSC material 22.
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