US 11,654,395 B2
Oxidation catalyst for a diesel engine exhaust
Tomoharu Hayama, Sakura Tochigi (JP)
Assigned to Johnson Matthey Japan Godo Kaisha, Sakura Tochigi (JP)
Filed by JOHNSON MATTHEY JAPAN GODO KAISHA, Sakura Tochigi (JP)
Filed on Dec. 19, 2018, as Appl. No. 16/225,652.
Prior Publication US 2019/0201844 A1, Jul. 4, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/94 (2006.01); B01J 23/89 (2006.01); B01J 35/04 (2006.01); B01J 37/08 (2006.01); B01J 21/12 (2006.01); B01J 37/02 (2006.01); B01J 21/04 (2006.01); B01J 21/08 (2006.01); F01N 3/10 (2006.01); B01J 20/16 (2006.01); B01J 21/06 (2006.01); B01J 23/656 (2006.01); B01J 29/068 (2006.01); B01J 35/00 (2006.01); F01N 3/28 (2006.01); F01N 3/08 (2006.01)
CPC B01D 53/944 (2013.01) [B01D 53/9468 (2013.01); B01D 53/9472 (2013.01); B01J 20/16 (2013.01); B01J 21/04 (2013.01); B01J 21/066 (2013.01); B01J 21/08 (2013.01); B01J 21/12 (2013.01); B01J 23/6562 (2013.01); B01J 23/8973 (2013.01); B01J 29/068 (2013.01); B01J 35/0006 (2013.01); B01J 35/04 (2013.01); B01J 37/0215 (2013.01); B01J 37/0236 (2013.01); B01J 37/0244 (2013.01); B01J 37/0246 (2013.01); B01J 37/0248 (2013.01); B01J 37/08 (2013.01); F01N 3/103 (2013.01); F01N 3/28 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/2073 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/2096 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/902 (2013.01); B01D 2255/903 (2013.01); B01D 2255/9022 (2013.01); B01D 2255/9032 (2013.01); B01D 2255/91 (2013.01); B01D 2255/9155 (2013.01); B01D 2258/012 (2013.01); B01J 2523/00 (2013.01); F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F01N 2330/06 (2013.01); F01N 2370/02 (2013.01); F01N 2510/063 (2013.01); F01N 2510/0682 (2013.01); F01N 2510/0684 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An oxidation catalyst for oxidizing carbon monoxide in an exhaust gas produced by a diesel engine, which oxidation catalyst comprising a catalytic region and a flow-through monolith substrate, wherein the catalytic region comprises a catalytic material consisting:
bismuth (Bi) or an oxide thereof disposed or supported on a support material;
a Group 8 metal, which is iron or an oxide thereof disposed or supported on the support material;
a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), and (ii) platinum (Pt) and palladium (Pd) having a ratio by weight of platinum to palladium of 15:1 to 1.5:1 when the platinum group metal (PGM) is platinum and palladium;
wherein the support material comprises alumina doped with silica.