US 11,959,411 B1
Treatment system for gasoline compression ignition engine exhaust
Fakhar Mehmood, Dhahran (SA); and Maryam M. Al-Taher, Dammam (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Dec. 15, 2022, as Appl. No. 18/066,734.
Int. Cl. F01N 3/20 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/208 (2013.01) [F01N 3/10 (2013.01); F01N 3/28 (2013.01); F01N 13/009 (2014.06); F01N 2250/12 (2013.01); F01N 2340/02 (2013.01); F01N 2370/00 (2013.01); F01N 2560/021 (2013.01); F01N 2570/10 (2013.01); F01N 2570/12 (2013.01); F01N 2570/14 (2013.01); F01N 2570/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system for treatment of gasoline compression ignition engine exhaust, comprising:
a carbon monoxide absorber and a nitrogen oxide absorber, wherein nitrogen oxide comprises one or more compounds consisting of nitrogen and oxygen;
an oxidation catalyst downstream of the carbon monoxide absorber, wherein the nitrogen oxide absorber is disposed over the oxidation catalyst;
a close coupled reduction catalyst downstream of the nitrogen oxide absorber;
an electrically heated catalyst between the oxidation catalyst and the close coupled reduction catalyst;
an underfloor reduction catalyst downstream of the close coupled reduction catalyst; and
an ammonia slip catalyst downstream of the underfloor reduction catalyst.