公开(公告)号：US20180243728A1

公开(公告)日：2018-08-30

申请号：US15553020

申请日：2016-02-17

Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Satoru KATOH ,  Toshitaka TANABE ,  Masahide MIURA ,  Hiromasa SUZUKI ,  Hiroaki NAITO ,  Hirotaka ORI ,  Keiichi NARITA ,  Michihiko TAKEUCHI ,  Tatsuya OHASHI

IPC: B01J23/63 ,  B01D53/94 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  B01J35/04 ,  F01N3/28

CPC classification number: B01J23/63 ,  B01D53/94 ,  B01D2255/1021 ,  B01D2255/407 ,  B01D2255/9202 ,  B01J35/023 ,  B01J35/026 ,  B01J35/04 ,  B01J35/10 ,  B01J35/1076 ,  B01J35/108 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/0219 ,  B01J37/0234 ,  B01J37/08 ,  F01N3/28 ,  F01N2330/02 ,  F01N2330/06 ,  F01N2510/068

Abstract: A catalyst for purification of exhaust gas, wherein a substrate and a catalyst coat layer which is formed on a surface of the substrate and which comprises catalyst particles, wherein the catalyst coat layer has an average thickness in a range of 25 to 160 μm, and a void fraction in a range of 50 to 80% by volume as measured by a weight-in-water method, 0.5 to 50% by volume of all voids in the catalyst coat layer consist of high-aspect ratio pores which have equivalent circle diameters in a range of 2 to 50 μm in a cross-sectional image of a cross-section of the catalyst coat layer which the cross-section is perpendicular to a flow direction of exhaust gas in the substrate, and which have aspect ratios of 5 or higher, and the high-aspect ratio pores have an average aspect ratio in a range of 10 to 50.

公开(公告)号：US20170291163A1

公开(公告)日：2017-10-12

申请号：US15482045

申请日：2017-04-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Yoshinori SAITO ,  Masahide MIURA ,  Tetsuhiro HIRAO ,  Masanao SATO ,  Hirotaka ORI

IPC: B01J23/63 ,  B01J37/00 ,  B01J37/02 ,  B01J35/04

CPC classification number: B01J23/63 ,  B01D53/945 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/2068 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/92 ,  B01D2255/9202 ,  B01D2255/9205 ,  B01J23/464 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0215 ,  B01J37/08

Abstract: When sizes of particles supporting a catalyst metal remain relatively large but sizes of particles not supporting a catalyst metal are minimized among metal oxide particles included in a catalyst coating layer, it is possible to decrease a thickness of the catalyst coating layer while maintaining durability and improve gas diffusibility of the coating layer. Therefore, a thickness of the catalyst coating is decreased without decreasing durability and a catalyst can exhibit high exhaust gas purification performance even under high load conditions.