公开(公告)号：US20230032414A1

公开(公告)日：2023-02-02

申请号：US17788020

申请日：2020-12-02

Applicant: Cataler Corporation

Inventor： Kohei Takasaki ,  Tatsuya Ohashi ,  Keiichi Narita

IPC: B01J23/44 ,  B01J27/224 ,  B01J21/04 ,  B01J23/10 ,  B01J35/04 ,  B01J35/10 ,  B01J35/00 ,  B01D53/94 ,  F01N3/20 ,  F01N3/28

Abstract: The present invention provides an exhaust gas purification catalyst in which platinum group metal migration from a catalyst layer to a base material during high temperature duration is suppressed. The exhaust gas purification catalyst disclosed herein includes a base material, a catalyst layer, and an intermediate layer arranged between the base material and the catalyst layer. The base material contains SiC. The catalyst layer contains a platinum group metal as a catalyst component. The intermediate layer contains substantially no platinum group metal. A product of a thickness of the intermediate layer (μm) and a specific surface area (m2/g) of the intermediate layer is 1100 or more.

公开(公告)号：US20230302434A1

公开(公告)日：2023-09-28

申请号：US18019162

申请日：2021-07-19

Applicant: Cataler Corporation

Inventor： Tatsuya Ohashi ,  Kohei Takasaki ,  Yu Onohara ,  Keiichi Narita

IPC: B01J23/58 ,  B01J21/06 ,  B01J35/00 ,  B01D53/32

CPC classification number: B01J23/58 ,  B01J21/06 ,  B01J35/0013 ,  B01D53/32 ,  B01D2255/1023 ,  B01D2255/2042 ,  B01D2257/702 ,  B01D2258/01

Abstract: Provided is an exhaust gas purification catalyst that includes a base material containing a silicon-silicon carbide composite material and a catalyst layer containing a barium component and that has excellent high-temperature durability of oxygen storage capacity. The exhaust gas purification catalyst disclosed here includes a base material and a catalyst layer in contact with the base material. The base material contains a silicon-silicon carbide composite material. The catalyst layer contains a platinum-group catalyst, a barium component, and an oxygen storage material. The barium component is one material selected from the group consisting of barium and a barium compound. The barium component is present on at least a surface of the oxygen storage material. The barium component has an average particle size of 100 nm or more and 350 nm or less.

公开(公告)号：US11524284B2

公开(公告)日：2022-12-13

申请号：US16758561

申请日：2018-09-14

Applicant: CATALER CORPORATION

Inventor： Kohei Takasaki ,  Yuji Matsuhisa ,  Nobuaki Bando ,  Hiroshi Ono ,  Tomohito Mizukami ,  Tsuyoshi Ito

IPC: B01J21/00 ,  B01J23/63 ,  B01J35/04 ,  B01D53/94 ,  F01N3/28 ,  B01J37/02 ,  B01J37/08

Abstract: An exhaust gas purification device has a metal substrate and a catalyst layer on the metal substrate, wherein the metal substrate is a wound body of one or a plurality of metal foils, at least one of the one or a plurality of metal foils is a perforated metal foil having holes, the catalyst layer contains noble metal catalyst particles and a carrier for carrying the noble metal catalyst particles, and more noble metal catalyst particles are present in the catalyst layer on side surfaces of holes, which face an upstream side of an exhaust gas flow, than in the catalyst layer on side surfaces of holes, which face a downstream side of the exhaust gas flow.

公开(公告)号：US11883797B2

公开(公告)日：2024-01-30

申请号：US17598994

申请日：2020-03-03

Applicant: CATALER CORPORATION

Inventor： Tatsuya Ohashi ,  Kohei Takasaki

IPC: B01J21/04 ,  B01J23/44 ,  B01J23/46 ,  B01J35/00 ,  B01J35/04 ,  F01N3/10 ,  B01J37/02

CPC classification number: B01J23/44 ,  B01J21/04 ,  B01J23/464 ,  B01J35/0006 ,  B01J37/0215 ,  F01N3/10 ,  F01N2510/0684

Abstract: An exhaust gas purification catalyst device having a substrate, a first catalyst coating layer on the substrate, and a second catalyst coating layer on the first catalyst coating layer. The first catalyst coating layer includes inorganic oxide particles, palladium carried on the inorganic oxide particles, and a barium compound. The second catalyst coating layer includes alumina particles and rhodium carried by the alumina particles. The ratio (MBa/MRh) between the mass (MBa) of barium in the first catalyst coating layer and the mass (MRh) of rhodium in the second catalyst coating layer is 5.0-60.0 inclusive.

公开(公告)号：US20230302438A1

公开(公告)日：2023-09-28

申请号：US18010525

申请日：2021-06-04

Applicant: Cataler Corporation

Inventor： Ryota Onoe ,  Takahiro Noguchi ,  Tatsuya Ohashi ,  Kohei Takasaki

IPC: B01J35/00 ,  B01J23/46 ,  B01J23/44 ,  B01J23/58 ,  B01J23/10 ,  B01J21/04 ,  B01J35/10 ,  F01N3/28 ,  B01D53/94

CPC classification number: B01J35/0006 ,  B01J23/464 ,  B01J23/44 ,  B01J23/58 ,  B01J23/10 ,  B01J21/04 ,  B01J35/1014 ,  F01N3/2828 ,  B01D53/9468 ,  F01N2370/02 ,  F01N2330/06 ,  B01D2255/908 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/407 ,  B01D2255/9207 ,  B01D2255/2042 ,  B01D2255/9022 ,  B01D2258/01

Abstract: According to a technique disclosed herein, provided is an exhaust gas purification catalyst, which both suppresses OSC when using a new vehicle and maintains OSC during life cycles. The exhaust gas purification catalyst disclosed herein is an exhaust gas purification catalyst includes a substrate, and a catalyst coated layer formed on the surface of the substrate, wherein the catalyst coated layer contains an OSC material having an oxygen storage capacity. The catalyst coated layer includes a Rh layer mainly containing Rh as a catalyst metal, and a Pd/Pt layer mainly containing Pd and/or Pt as a catalyst metal. At least a portion of the Pd/Pt layer in the catalyst coated layer contains, as the OSC material, a low specific surface area OSC material, including a ceria-zirconia composite oxide and having a specific surface area of 40 m2/g or more and 60 m2/g or less.

公开(公告)号：US20240278217A1

公开(公告)日：2024-08-22

申请号：US18569653

申请日：2022-06-10

Applicant: Cataler Corporation

Inventor： Tatsuya Ohashi ,  Kohei Takasaki ,  Yu Onohara

IPC: B01J23/46 ,  B01D53/94 ,  B01J35/56

CPC classification number: B01J23/462 ,  B01D53/945 ,  B01J35/56 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2258/01

Abstract: The present invention provides an exhaust gas purification catalyst with excellent warm-up characteristics, which can quickly exhibit effective catalytic activity even when exhaust gas in a relatively low temperature range is introduced. In the exhaust gas purification catalyst disclosed herein, a catalyst support portion provided on the base material includes: a catalyst coat portion having a carrier made of inorganic compound particles and at least one catalyst metal in a supported state on the carrier, and a catalyst metal direct support portion having at least one catalyst metal in a directly supported state on the base material without the carrier, the catalyst metal direct support portion is provided in at least an upstream region of a predetermined length from an upstream end in an exhaust gas passage, and the catalyst coat portion is not provided in the upstream region in the exhaust gas passage and is provided only in a downstream region downstream of the upstream region.