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.