US 12,071,882 B2
Low temperature NOx reduction using H2-SCR for diesel vehicles
Yuejin Li, Edison, NJ (US)
Assigned to BASF Corporation, Florham Park, NJ (US)
Filed by BASF Corporation, Florham Park, NJ (US)
Filed on Jun. 29, 2023, as Appl. No. 18/215,855.
Application 18/215,855 is a continuation of application No. 16/386,873, filed on Apr. 17, 2019, granted, now 11,732,625.
Application 16/386,873 is a continuation of application No. PCT/IB2017/056452, filed on Oct. 17, 2017.
Claims priority of provisional application 62/409,413, filed on Oct. 18, 2016.
Prior Publication US 2023/0340898 A1, Oct. 26, 2023
Int. Cl. F01N 3/02 (2006.01); B01D 53/90 (2006.01); B01D 53/94 (2006.01); F01N 3/021 (2006.01); F01N 3/035 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/035 (2013.01) [B01D 53/90 (2013.01); B01D 53/94 (2013.01); B01D 53/9418 (2013.01); B01D 53/9422 (2013.01); B01D 53/9427 (2013.01); B01D 53/9477 (2013.01); F01N 3/021 (2013.01); F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F01N 3/106 (2013.01); F01N 3/206 (2013.01); F01N 3/2066 (2013.01); F01N 13/009 (2014.06); B01D 53/9436 (2013.01); B01D 2251/202 (2013.01); B01D 2255/102 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/20738 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2255/9205 (2013.01); B01D 2255/9207 (2013.01); B01D 2258/012 (2013.01); F01N 2370/00 (2013.01); F01N 2510/06 (2013.01); F01N 2610/04 (2013.01); Y02A 50/20 (2018.01); Y02T 10/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An emission treatment system for selectively reducing NOx compounds, the system comprising:
a hydrogen generator; and
an H2-SCR catalytic article comprising a substrate and an H2-SCR catalyst composition, the hydrogen generator being in fluid communication with, and upstream of, the H2-SCR catalytic article;
wherein the H2-SCR catalyst composition comprises a platinum group metal component supported on a hydrogen form of zeolite or a metal oxide selected from zirconia, titania, magnesia, and combinations thereof; and
a diesel oxidation catalyst (DOC) catalyst composition
wherein the DOC catalyst composition is present in a layered catalyst coating on the H2-SCR catalytic article with a bottom layer comprising the DOC catalyst composition and an upper layer comprising the H2-SCR catalyst composition; and
wherein the hydrogen generator is selected from the group consisting of on board hydrogen, hydrogen produced from alcohol reforming, hydrogen produced from ammonia decomposition, and combinations thereof.