US 11,732,625 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 Apr. 17, 2019, as Appl. No. 16/386,873.
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 2019/0242282 A1, Aug. 8, 2019
Int. Cl. F01N 3/02 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01); B01D 53/94 (2006.01); B01D 53/90 (2006.01); F01N 3/035 (2006.01); F01N 3/021 (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 with a metal loading ranging from 0.1% to 1% by weight of the H2-SCR catalyst composition supported on a support consisting of (i) a hydrogen form of zeolite, (ii) a metal oxide selected from the group consisting of zirconia, titania, magnesia, and combinations thereof, or (iii) combinations of (i) and (ii); and
at least one of (a) a diesel oxidation catalyst (DOC) catalyst composition; and (b) a lean NOx trap (LNT) composition,
wherein when the LNT composition is present, the system comprises a lean NOx trap (LNT) catalytic article comprising a substrate and the LNT catalyst composition, the LNT catalytic article in fluid communication with, and downstream of, the H2-SCR catalytic article, and
wherein when the DOC catalyst composition is present, the DOC catalyst composition is
present in a zoned catalyst coating on the H2-SCR catalytic article with an upstream zone comprising the H2-SCR catalyst composition and a downstream zone comprising the DOC catalyst composition.