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公开(公告)号：US11504700B2
公开(公告)日：2022-11-22
申请号：US16603380
申请日：2018-04-09
申请人： CATALER CORPORATION
发明人： Shunsuke Oishi , Shogo Kawamura , Takahiro Nagata , Hirotaka Ori , Minoru Itou
IPC分类号： B01J21/04 , B01J21/06 , B01J21/08 , B01J21/10 , B01J21/12 , B01J23/02 , B01J23/42 , B01J23/44 , B01J23/46 , B01J23/58 , B01J35/00 , B01J35/04 , B01J37/02 , B01J37/08 , B01J27/053 , B01D53/94 , F01N3/28
摘要： The present invention provides an exhaust gas purification catalyst including an alkaline earth metal supported in a highly dispersed state on a porous carrier. A catalyst layer of the exhaust gas purification catalyst provided by the invention has an alkaline earth metal-supporting region including a porous carrier, a catalyst metal belonging to the platinum group, and a sulfate of at least one type of alkali earth metal supported on the porous carrier. In a cross-section of this region, a Pearson correlation coefficient RAe/M is at least 0.5 as calculated using α and β for each pixel obtained by carrying out area analysis by FE-EPMA under conditions of pixel size of 0.34 μm×0.34 μm, and measured pixel number 256×256, and by measuring the characteristic X-ray intensity (α:cps) of the alkaline earth metal element (Ae) and the characteristic X-ray intensity (β:cps) of the main constituent element of the inorganic compound constituting the porous carrier for each pixel.
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公开(公告)号：US20200030780A1
公开(公告)日：2020-01-30
申请号：US16603380
申请日：2018-04-09
申请人： CATALER CORPORATION
发明人： Shunsuke Oishi , Shogo KAWAMURA , Takahiro NAGATA , Hirotaka ORI , Minoru ITOU
IPC分类号： B01J27/053 , B01J35/04 , B01J35/00 , B01J23/46 , B01J37/02 , B01J37/08 , B01D53/94 , F01N3/28
摘要： The present invention provides an exhaust gas purification catalyst including an alkaline earth metal supported in a highly dispersed state on a porous carrier. A catalyst layer of the exhaust gas purification catalyst provided by the invention has an alkaline earth metal-supporting region including a porous carrier, a catalyst metal belonging to the platinum group, and a sulfate of at least one type of alkali earth metal supported on the porous carrier. In a cross-section of this region, a Pearson correlation coefficient RAe/M is at least 0.5 as calculated using α and β for each pixel obtained by carrying out area analysis by FE-EPMA under conditions of pixel size of 0.34 μm×0.34 μm, and measured pixel number 256×256, and by measuring the characteristic X-ray intensity (α: cps) of the alkaline earth metal element (Ae) and the characteristic X-ray intensity (β: cps) of the main constituent element of the inorganic compound constituting the porous carrier for each pixel.
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公开(公告)号：US20240024816A1
公开(公告)日：2024-01-25
申请号：US18353955
申请日：2023-07-18
发明人： Toshimasa Hara , Motohisa Kado , Taizo Yoshinaga , Hirohito Hirata , Takahiro Suzuki , Shunsuke Oishi , Kazuyoshi Tsukamoto , Fumiyasu Oba
CPC分类号： B01D53/8628 , B01J23/464 , B01J23/20 , B01J21/063 , B01J35/0013 , B01J37/0215 , B01J37/036 , B01D2255/1025 , B01D2255/207
摘要： The present disclosure provides an exhaust gas purification catalyst with increased catalytic activity. The exhaust gas purification catalyst comprises a metal oxide support and Rh particles supported on the metal oxide support, wherein the metal oxide support is doped with a cation having a higher oxidation number than the cation of the metal oxide support. The metal oxide support may be a SrTiO3 support doped with greater than 0 mol % and 8 mol % or lower Nb, a ZrO2 support doped with 5 mol % to 20 mol % Nb, or an Al2O3 support doped with greater than 0 mol % and 7 mol % or lower Ti.
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公开(公告)号：US20230277986A1
公开(公告)日：2023-09-07
申请号：US18018971
申请日：2021-07-19
申请人： Cataler Corporation
发明人： Taku Miura , Takashi Goto , Shunsuke Oishi
CPC分类号： B01D53/945 , B01J23/63 , F01N3/101 , F01N3/103 , F01N3/0864 , B01D2255/9022 , B01D2255/1023 , B01D2255/1025 , B01D2255/2065 , B01D2257/702 , B01D2257/40 , B01D2257/502 , B01D2258/01 , F01N2510/06 , F01N2570/12 , F01N2570/14 , F01N2570/16
摘要： The present disclosure provides an exhaust gas purifying catalyst that may exhibit high purification performance both in a low temperature state immediately after an engine is started and during a high-load operation. The exhaust gas purifying catalyst disclosed herein contains at least one type of noble metal purifying exhaust gas, and includes a substrate, and a catalyst coat layer formed on a surface of the substrate. The catalyst coat layer is formed to have a stack structure including a lower layer provided on the substrate and an upper layer provided on the lower layer. The lower layer contains a noble metal and an oxide having an oxygen storage capacity. A noble metal-containing surface layer portion containing a noble metal is formed in at least a part of a surface portion of the upper layer. The upper layer does not contain an oxide having the oxygen storage capacity.
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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：US20230036970A1
公开(公告)日：2023-02-02
申请号：US17788531
申请日：2020-12-07
申请人： Cataler Corporation
发明人： Ryota Onoe , Ryo Tasaki , Shunsuke Oishi , Koki Aono
摘要： The technology herein disclosed provides a wall flow type exhaust gas purifying catalyst capable of establishing the compatibility between the noxious gas purifying performance and the pressure loss suppressing performance at a high level. The exhaust gas purifying catalyst herein disclosed includes a base material 11 and a catalyst layer 20. Then, a first catalyst region 22 including the catalyst layer 20 formed therein is provided on an entry side surface 16a of a partition wall 16 of the base material 11. A second catalyst region 24 including the catalyst layer 20 formed on a wall surface 18a of a pore 18 is provided in a prescribed region from an exit side surface 16b of the partition wall toward an entry side cell 12. Further, a catalyst unformed region 30 in which a catalyst layer is substantially not formed is provided between the first catalyst region 22 and the second catalyst region 24 in the thickness direction Y of the partition wall 16. As a result of this, it is possible to prevent the deposition of PMs in the second catalyst region 24 including the catalyst layer 20 formed in the pore 18, and to establish the compatibility between the noxious gas purifying performance and the pressure loss suppressing performance at a high level.
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8.发明公开公开(公告)号：US20240110496A1
公开(公告)日：2024-04-04
申请号：US18276298
申请日：2022-02-01
申请人： Cataler Corporation
发明人： Ryota Onoe , Junichi Hori , Ryosuke Takasu , Tatsuya Ohashi , Shunsuke Oishi
CPC分类号： F01N3/2026 , B01D53/945 , B01D53/9495 , B01J23/464 , B01D2258/012 , B01D2258/014 , B01D2259/122 , B01D2259/4591
摘要： The present invention provides an ohmic heating-type exhaust gas purification catalyst system. The ohmic heating-type exhaust gas purification catalyst system is configured to perform, based on information of temperature of a catalyst bed input from a temperature detector of an ohmic heating-type exhaust gas purification device, electric current pass control including controls of (1) causing an electric current to pass through a pair of electrodes when the temperature of the catalyst bed is equal to or lower than a first threshold temperature T1 set in a range of 350±25° C., (2) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the first threshold temperature T1 and is equal to or lower than a second threshold temperature T2 set in a range of 450±25° C., (3) causing an electric current caused to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the second threshold temperature T2 and is equal to or lower than a third threshold temperature T3 set to be equal to or higher than 550° C., and (4) not causing an electric current to pass through the pair of electrodes when the temperature of the catalyst bed exceeds the third threshold temperature T3.
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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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