US 12,228,056 B1
Active hydrocarbon trap for reduction of emissions from internal combustion engines using an electrically-heated catalyst
Alexander Voice, Detroit, MI (US); Kaustav Bhadra, Ann Arbor, MI (US); Esam Hamad, Brighton, MI (US); and Praveen Kumar, New Hudson, MI (US)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by ARAMCO SERVICES COMPANY, Houston, TX (US)
Filed on Dec. 20, 2023, as Appl. No. 18/390,839.
Int. Cl. F01N 13/00 (2010.01); F01N 3/08 (2006.01); F01N 3/00 (2006.01); F01N 3/10 (2006.01); F01N 3/20 (2006.01)
CPC F01N 13/009 (2014.06) [F01N 3/0835 (2013.01); F01N 3/005 (2013.01); F01N 3/101 (2013.01); F01N 3/105 (2013.01); F01N 3/2026 (2013.01); F01N 2240/02 (2013.01); F01N 2240/16 (2013.01); F01N 2250/12 (2013.01); F01N 2370/24 (2013.01); F01N 2370/40 (2013.01); F01N 2390/02 (2013.01); F01N 2570/12 (2013.01); F01N 2900/1404 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A device for reducing emissions from an internal combustion engine including a close-coupled catalyst, the device comprising:
a hydrocarbon trap disposed downstream of the close-coupled catalyst;
an electrically-heated catalyst disposed downstream of the hydrocarbon trap, the electrically-heated catalyst including at least one electrical heating element which is controlled so as to reduce emissions in conjunction with the hydrocarbon trap;
a heat exchanger disposed downstream of the close-coupled catalyst, the heat exchanger configured to heat exhaust gas of the internal combustion engine via an ambient air stream; and
a liquid water knockout disposed downstream of the close-coupled catalyst.