US 12,233,404 B2
Exhaust gas purification catalyst
Chihiro Kasuya, Kakegawa (JP)
Assigned to Cataler Corporation, Kakegawa (JP)
Appl. No. 17/763,254
Filed by Cataler Corporation, Kakegawa (JP)
PCT Filed Aug. 20, 2020, PCT No. PCT/JP2020/031422
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/065238, PCT Pub. Date Aug. 4, 2021.
Claims priority of application No. 2019-181628 (JP), filed on Oct. 1, 2019.
Prior Publication US 2022/0362756 A1, Nov. 17, 2022
Int. Cl. B01J 21/04 (2006.01); B01D 53/94 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 21/10 (2006.01); B01J 21/12 (2006.01); B01J 21/14 (2006.01); B01J 23/10 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/58 (2006.01); B01J 23/63 (2006.01); B01J 35/40 (2024.01); B01J 35/60 (2024.01); B01J 35/64 (2024.01); B01J 35/69 (2024.01); F01N 3/28 (2006.01)
CPC B01J 35/657 (2024.01) [B01D 53/944 (2013.01); B01D 53/945 (2013.01); B01J 21/04 (2013.01); B01J 23/63 (2013.01); B01J 35/40 (2024.01); B01J 35/69 (2024.01); F01N 3/2828 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9155 (2013.01); B01D 2255/9205 (2013.01); F01N 3/2842 (2013.01); F01N 2330/02 (2013.01); F01N 2370/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An exhaust gas purification catalyst that is arranged on an exhaust path of an internal combustion engine and purifies exhaust gas exhausted from the internal combustion engine, the exhaust gas purification catalyst comprising:
a base material; and
a catalyst layer that is arranged on the base material and comprises:
a catalyst metal; and
a carrying material carrying the catalyst metal,
wherein the catalyst layer satisfies all of conditions described below:
(1) in a pore distribution curve measured by a mercury porosimeter, a peak for the largest pore volume exists within a range of a pore diameter equal to or more than 1 μm and not more than 10 μm; and
(2) on an electron microscopy observation image (with a 1000-fold magnification) of a surface of the catalyst layer, when areas of a plurality of voids comprised in the electron microscopy observation image are respectively calculated, a standard deviation for the areas of the plurality of voids is not more than 30 μm2.