公开(公告)号：US20230201770A1

公开(公告)日：2023-06-29

申请号：US17925982

申请日：2021-06-08

Applicant: CATALER CORPORATION

Inventor： Toshio YAMAMOTO ,  Akira MORIKAWA ,  Satoru KATOH ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Nobuyuki TAKAGI ,  Takashi ONOZUKA ,  Mitsuyoshi OKADA

IPC: B01D53/94 ,  B01J23/40 ,  B01J23/63 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  F01N3/28

CPC classification number: B01D53/9413 ,  B01J23/40 ,  B01J23/63 ,  B01J35/023 ,  B01J35/1076 ,  B01J35/108 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/0215 ,  B01J37/0228 ,  B01J37/0248 ,  F01N3/28 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/9202 ,  B01D2255/9205

Abstract: A catalyst for purification of exhaust gas including a substrate, and a catalyst coat layer which is formed on a surface of the substrate and contains catalyst particles, wherein the catalyst coat layer has an average thickness ranging 25 to 150 μm, a void fraction, as determined by scanning electron microscope observation of a cross-section of the catalyst coat layer, ranging 1.5 to 8.0% by volume, 60 to 90% by volume of all voids in the catalyst coat layer are high-aspect ratio pores which have equivalent circle diameters ranging 2 to 50 μm in a cross-sectional image of a cross-section of the catalyst coat layer perpendicular to a flow direction of exhaust gas in the substrate, and which ratios of 5 or higher, the high-aspect ratio pores have an average aspect ratio ranging 10 to 50, and a noble metal is supported on the entire catalyst coat layer.

公开(公告)号：US20220016601A1

公开(公告)日：2022-01-20

申请号：US17295683

申请日：2019-11-14

Applicant: CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shunsuke OHISHI ,  Takaya OTA ,  Ryosuke TAKASU ,  Mitsuyoshi OKADA ,  Minoru ITOU ,  Kana IWATA ,  Takumi TOJO ,  Takeru YOSHIDA ,  Masaru KAKINOHANA ,  Hiromasa SUZUKI

IPC: B01J23/46 ,  B01D53/94 ,  B01J23/10 ,  B01J35/04 ,  B01J37/02 ,  B01J37/04 ,  B01J37/08

Abstract: An exhaust-gas purification apparatus includes: a honeycomb base material including a plurality of exhaust-gas flow paths partitioned by a porous wall; and one or more catalyst noble metals carried by the honeycomb base material. The catalyst noble metals are selected from the group consisting of platinum, palladium, and rhodium. The honeycomb base material has a noble metal concentrated surface section in which a 50%-by-mass noble metal carry depth for a specific noble metal that is one type among one or two catalyst noble metals is less than 50% of the distance from the surface to the center of the inside of the porous wall. The 50%-by-mass noble metal carry depth is the depth at which, when the amount of the specific noble metal carried between the surface and the center of the inside of porous wall is used as a reference, 50% by mass of specific noble metal is carried.

公开(公告)号：US20170348674A1

公开(公告)日：2017-12-07

申请号：US15534841

申请日：2015-12-11

Applicant: TOYOTA JIDOSHIA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa SUZUKI ,  Takeru YOSHIDA ,  Masahide MIURA ,  Yuki AOKI ,  Isao CHINZEI ,  Yoshinori SAITO ,  Daisuke OCHIAI ,  Mitsuyoshi OKADA ,  Toshitaka TANABE ,  Akihiko SUDA ,  Masanao SATO ,  Akiya CHIBA ,  Akira MORIKAWA ,  Hirotaka ORI

IPC: B01J23/63 ,  B01J37/03 ,  B01J37/08 ,  F01N3/10 ,  B01J35/04 ,  B01J23/00 ,  B01J35/00 ,  B01J37/02 ,  B01D53/94

Abstract: The object of the present invention is to provide an exhaust gas purifying catalyst that can achieve high purification performance while suppressing H2S emissions. The object is solved by an exhaust gas purifying catalyst in which the top layer of a catalyst coating layer comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % in relation to the total cation amount, and the molar ratio of (cerium+additional element):(zirconium) is within the range from 43:57 to 48:52.

公开(公告)号：US20180264409A1

公开(公告)日：2018-09-20

申请号：US15534805

申请日：2015-12-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Hiromasa SUZUKI ,  Takeru YOSHIDA ,  Masahide MIURA ,  Isao CHINZEI ,  Mitsuyoshi OKADA ,  Toshitaka TANABE ,  Akihiko SUDA ,  Hirotaka ORI ,  Akiya CHIBA ,  Kosuke IIZUKA ,  Akira MORIKAWA

IPC: B01D53/94 ,  B01J37/02 ,  B01J37/03 ,  C04B35/488

CPC classification number: B01D53/945 ,  B01D2255/1021 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/2066 ,  B01D2255/40 ,  B01D2255/407 ,  B01D2255/9032 ,  B01D2255/908 ,  B01D2255/9207 ,  B01D2258/012 ,  B01J23/002 ,  B01J23/63 ,  B01J35/0006 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0201 ,  B01J37/0244 ,  B01J37/0248 ,  B01J37/03 ,  B01J37/038 ,  C01F17/0043 ,  C01G25/02 ,  C01P2002/50 ,  C01P2002/54 ,  C04B35/488 ,  C04B35/6261 ,  C04B2235/3224 ,  C04B2235/3229 ,  C04B2235/3244 ,  C04B2235/443 ,  C04B2235/5436 ,  C04B2235/604 ,  C04B2235/664 ,  C04B2235/76 ,  Y02T10/22

Abstract: The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.

公开(公告)号：US20210310391A1

公开(公告)日：2021-10-07

申请号：US17251942

申请日：2019-06-26

Applicant: CATALER CORPORATION

Inventor： Chihiro KASUYA ,  Yuji YABUZAKI ,  Masaaki KAWAI ,  Mitsuyoshi OKADA

IPC: F01N3/10 ,  B01J23/46 ,  F01N3/28 ,  B01J23/42 ,  B01J23/44

Abstract: An exhaust gas purification catalyst device has catalyst coating layers, which extend from the upstream side to the downstream side of the exhaust gas flow. The catalyst coating layers each have at least three zones present in order from the upstream side to the downstream side of the exhaust gas flow, and each of these at least three zones is an oxidation catalyst zone or a reduction catalyst zone. In the uppermost layer of an oxidation catalyst zone, the total number of atoms of platinum and palladium is greater than the number of atoms of rhodium; in the upper most layer of a reduction catalyst zone, the number of atoms of rhodium is greater than the total number of atoms of platinum and palladium. The oxidation catalyst zones and the reduction catalyst zones alternate at least twice in the exhaust gas flow direction.

公开(公告)号：US20210197175A1

公开(公告)日：2021-07-01

申请号：US17088767

申请日：2020-11-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Norimichi SHIMANO ,  Hiromi TOGASHI ,  Hiroki NIHASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

IPC: B01J23/46 ,  B01J23/42 ,  B01J23/44

Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation σ is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.