US 12,390,796 B2
Diesel oxidation catalyst
Shiang Sung, New York, NY (US); Patrick William McCanty, Caldwell, NJ (US); Stanley A. Roth, Yardley, PA (US); Xiaolai Zheng, Princeton Junction, NJ (US); Olga Gerlach, Ludwigshafen (DE); and Markus Kögel, Römerberg (DE)
Assigned to BASF Mobile Emissions Catalysts LLC, Iselin, NJ (US)
Filed by BASF Corporation, Florham Park, NJ (US)
Filed on Jul. 9, 2020, as Appl. No. 16/924,667.
Application 16/924,667 is a division of application No. 15/548,657, granted, now 10,857,521, previously published as PCT/US2016/016949, filed on Feb. 8, 2016.
Claims priority of provisional application 62/113,696, filed on Feb. 9, 2015.
Prior Publication US 2020/0346192 A1, Nov. 5, 2020
Int. Cl. B01J 35/00 (2024.01); B01D 53/94 (2006.01); B01J 23/00 (2006.01); B01J 23/63 (2006.01); B01J 23/656 (2006.01); B01J 29/06 (2006.01); B01J 29/068 (2006.01); B01J 29/076 (2006.01); B01J 29/08 (2006.01); B01J 29/12 (2006.01); B01J 29/16 (2006.01); B01J 29/18 (2006.01); B01J 29/22 (2006.01); B01J 29/26 (2006.01); B01J 29/40 (2006.01); B01J 29/44 (2006.01); B01J 29/48 (2006.01); B01J 29/65 (2006.01); B01J 29/67 (2006.01); B01J 29/69 (2006.01); B01J 29/70 (2006.01); B01J 29/74 (2006.01); B01J 29/78 (2006.01); B01J 35/56 (2024.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); B01J 37/10 (2006.01); B01J 37/20 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01)
CPC B01J 23/6562 (2013.01) [B01D 53/9418 (2013.01); B01D 53/944 (2013.01); B01J 23/002 (2013.01); B01J 23/63 (2013.01); B01J 29/061 (2013.01); B01J 29/068 (2013.01); B01J 29/076 (2013.01); B01J 29/088 (2013.01); B01J 29/126 (2013.01); B01J 29/166 (2013.01); B01J 29/185 (2013.01); B01J 29/22 (2013.01); B01J 29/26 (2013.01); B01J 29/405 (2013.01); B01J 29/44 (2013.01); B01J 29/48 (2013.01); B01J 29/655 (2013.01); B01J 29/67 (2013.01); B01J 29/69 (2013.01); B01J 29/7057 (2013.01); B01J 29/7065 (2013.01); B01J 29/7415 (2013.01); B01J 29/743 (2013.01); B01J 29/7815 (2013.01); B01J 29/783 (2013.01); B01J 35/19 (2024.01); B01J 35/56 (2024.01); 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); B01J 37/10 (2013.01); B01J 37/20 (2013.01); F01N 3/106 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/2042 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/2073 (2013.01); B01D 2255/2092 (2013.01); B01D 2255/30 (2013.01); B01D 2255/40 (2013.01); B01D 2255/9025 (2013.01); B01D 2255/91 (2013.01); B01D 2255/9155 (2013.01); B01J 2523/00 (2013.01); F01N 3/2066 (2013.01); F01N 2370/02 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system for treatment of a lean burn engine exhaust gas stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, particulate matter, and other exhaust components, the system comprising:
an exhaust conduit in fluid communication with a lean burn engine via an exhaust manifold;
an oxidation catalyst composite; and
a catalyzed soot filter and a selective catalytic reduction (SCR) catalyst located downstream from the oxidation catalyst composite;
wherein the oxidation catalyst composite comprises:
a carrier substrate; and
a catalytic coating on at least a portion of the carrier substrate, the catalytic coating including:
a first oxidation component comprising a platinum (Pt) component, a palladium (Pd) component and a refractory metal oxide, wherein the first oxidation component is substantially free of zeolite;
a NOx storage component comprising ceria and one or more of alumina, silica, titania, and manganese; and
a second oxidation component comprising a second refractory metal oxide, a zeolite, and platinum (Pt) component,
wherein the first oxidation component comprises the Pt component to the Pd component in a weight ratio of about 0:1 to 4:1,
wherein the NOx storage component is substantially free of platinum, palladium, and zirconia,
wherein the NOx storage component comprises a ceria in a range from about 80-99.8 wt. %, alumina in a range from about 0.1 to 10 wt. %, and silica in a range from about 0.1 to 10 wt. % based on a weight of the NOx storage component,
wherein the second oxidation component is substantially free of palladium, wherein the first oxidation component is in an under layer on the carrier substrate, the NOx storage component is in a middle layer on the under layer, and the second oxidation component is in an upper layer on the middle layer.