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公开(公告)号：US20220316372A1
公开(公告)日：2022-10-06
申请号：US17618082
申请日：2020-06-26
Applicant: Cataler Corporation
Inventor： Ryo Tasaki , Ryota Onoe , Momoko Iwai , Yamato Matsushita
IPC: F01N3/022 , F01N3/035 , B01D46/24 , B01D46/82 , B01D53/94 , B01J23/02 , B01J21/04 , B01J23/58 , B01J35/04 , B01J35/00
Abstract: A particulate filter disclosed herein includes a wall-flow structure substrate 10 and a wash coat layer 20 held inside a partition 16 of the substrate 10. The wash coat layer 20 includes an inlet layer 22 formed to have predetermined length LA and thickness TA from near an end thereof on an exhaust gas inflow side X1, and an outlet layer 24 formed to have predetermined length LB and thickness TB from near an end thereof on an exhaust gas outflow side X2. The inlet layer 22 and the outlet layer 24 partially overlap each other. In the particulate filter disclosed herein, the inlet layer 22 contains a precious metal catalyst, while the outlet layer 24 contains substantially no precious metal catalyst. The length LA of the inlet layer is 50% or more and 75% or less of a total length L of the partition 16. Thus, the particulate filter is capable of achieving both PM collection performance and pressure-drop reduction performance at high levels.
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公开(公告)号：US12173634B2
公开(公告)日：2024-12-24
申请号：US18568875
申请日：2021-12-09
Applicant: Cataler Corporation
Inventor： Ryo Tasaki , Ryota Onoe , Masaya Ito , Momoko Iwai , Yamato Matsushita
IPC: F01N3/035 , B01D39/20 , B01D46/24 , B01D53/94 , B01J20/32 , B01J23/63 , B01J35/56 , F01N3/022 , F01N3/08 , F01N3/24 , F01N3/28
Abstract: The technology disclosed herein provides a particulate filter that can appropriately avoid PM from passing toward the outlet cell and can exhibit an excellent PM capturing performance. The particulate filter 1 disclosed herein includes: an outercoat layer 20 provided on an inlet surface 16a of a partition 16 of a base material 10. The outercoat layer 20 at least includes: a lower layer 22 provided on the inlet surface 16a of the partition 16; and an upper layer 24 provided to cover the lower layer 22. The mean particle diameter of granules contained in the upper layer 24 is higher than the mean particle diameter of granules contained in the lower layer. The mean particle diameter of the granules in the lower layer 22 is from 0.4 μm to 2.0 μm inclusive, and the mean particle diameter of the granules in the upper layer 24 is from 2.0 μm to 7.0 μm inclusive. With such a configuration, PM can be captured in an inlet cell 12, thereby suitably avoiding PM from passing toward an outlet cell 14 and exhibiting an excellent PM capturing performance.
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Patent Agency Ranking
公开(公告)号：US20240269614A1
公开(公告)日：2024-08-15
申请号：US18567809
申请日：2022-06-10
Applicant: Cataler Corporation
Inventor： Masaya Ito , Ryota Onoe , Ryo Tasaki , Momoko Iwai , Yamato Matsushita
CPC classification number: B01D53/9454 , F01N3/035 , F01N3/28 , B01D2255/1025 , B01D2255/9155 , F01N2370/02 , F01N2510/0684
Abstract: According to the present invention, a wall-flow type particulate filter in which pressure loss is suppressed despite a large formation region of a catalyst layer is provided. The particulate filter disclosed herein includes a wall-flow type base material and a catalyst layer formed on the base material. The base material includes an inlet side cell whose only end part on an exhaust gas entry side is open, an outlet side cell whose only end part on an exhaust gas exit side is open, and a partition wall that sections between the inlet side cell and the outlet side cell and includes a plurality of pores communicating between the inlet side cell and the outlet side cell. A first catalyst layer is formed on a surface of the partition wall that is in contact with the inlet side cell. The first catalyst layer is provided in a region over 80% of a total length of the base material from an end part of the base material on the exhaust gas entry side toward an end part thereof on the exhaust gas exit side. In at least a region from a position corresponding to 20% of the total length of the base material to a position corresponding to 80% thereof, from the end part of the base material on the exhaust gas entry side, the first catalyst layer is inclined so that a thickness of the first catalyst layer decreases from the end part on the exhaust gas entry side toward the end part on the exhaust gas exit side.
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公开(公告)号：US20240165591A1
公开(公告)日：2024-05-23
申请号：US18404981
申请日：2024-01-05
Applicant: CATALER CORPORATION
Inventor： Takahiro Noguchi , Ryota Onoe , Ryo Tasaki , Momoko Iwai , Yamato Matsushita
CPC classification number: B01J23/464 , B01J23/42 , B01J23/44 , B01J35/19 , F01N3/20 , F01N2570/10 , F01N2570/12 , F01N2570/14
Abstract: An exhaust gas purification catalyst provides excellent removal performance of methane, which is chemically stable. Exhaust gas purification catalyst includes a substrate that divides cells through which an exhaust gas flows and a catalyst layer that is provided on a surface of the substrate. The catalyst layer includes a palladium layer containing palladium that extends from a first end part which is an end part on the side into which an exhaust gas in the cells flows to a second end part which is an end part on the side from which an exhaust gas flows out, a platinum layer containing platinum that extends from the second end part to the first end part, and a rhodium layer containing rhodium that is laminated with both the palladium layer and the platinum layer.
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公开(公告)号：US20230356205A1
公开(公告)日：2023-11-09
申请号：US18355016
申请日：2023-07-19
Applicant: CATALER CORPORATION
Inventor： Ryo Tasaki , Ryota Onoe , Momoko Iwai , Yamato Matsushita
CPC classification number: B01J35/04 , B01J23/44 , B01J23/10 , B01J35/026 , F01N3/022 , F01N3/035 , B01D53/94 , B01D2255/9155 , B01D2255/2092 , B01D2255/2065 , B01D2258/012
Abstract: An exhaust gas-purifying catalyst includes a catalyst-coated filter and inorganic particles in a powder form. The catalyst-coated filter includes a filter substrate and a catalyst layer on a pore wall of the filter substrate. The catalyst-coated filter has a first end portion, a second end portion, a filter wall, an entry-side cell, and an exit-side cell. The filter wall is porous. The entry-side cell is opened at the first end portion and closed at the second end portion. The exit-side cell is opened at the second end portion and closed at the first end portion. The entry-side cell and the exit-side cell are adjacent to each other with the filter wall interposed therebetween. The inorganic particles in a powder form are localized at a surface of the filter wall adjacent to the entry-side cell at a cross section parallel to the thickness direction of the filter wall.
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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
Applicant: Cataler Corporation
Inventor： Ryota Onoe , Ryo Tasaki , Shunsuke Oishi , Koki Aono
Abstract: 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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公开(公告)号：US20220176354A1
公开(公告)日：2022-06-09
申请号：US17437972
申请日：2020-03-10
Applicant: Cataler Corporation
Inventor： Takahiro Noguchi , Ryota Onoe , Ryo Tasaki , Momoko Iwai , Yamato Matsushita
Abstract: An exhaust gas purification catalyst provides excellent removal performance of methane, which is chemically stable. Exhaust gas purification catalyst includes a substrate that divides cells through which an exhaust gas flows and a catalyst layer that is provided on a surface of the substrate. The catalyst layer includes a palladium layer containing palladium that extends from a first end part which is an end part on the side into which an exhaust gas in the cells flows to a second end part which is an end part on the side from which an exhaust gas flows out, a platinum layer containing platinum that extends from the second end part to the first end part, and a rhodium layer containing rhodium that is laminated with both the palladium layer and the platinum layer.
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