US 12,253,305 B2
LNG reforming system and method of controlling the same
Dong Seok Ko, Yongin-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Sep. 21, 2021, as Appl. No. 17/480,908.
Claims priority of application No. 10-2021-0045183 (KR), filed on Apr. 7, 2021.
Prior Publication US 2022/0325950 A1, Oct. 13, 2022
Int. Cl. F25J 1/00 (2006.01)
CPC F25J 1/0095 (2013.01) [F25J 1/0022 (2013.01); F25J 2210/62 (2013.01); F25J 2215/04 (2013.01); F25J 2245/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A liquid natural gas (LNG) reforming system comprising:
a reformer provided to receive LNG from an LNG tank;
a CO2 pressure swing adsorption (PSA) unit connected to the reformer and configured to extract carbon dioxide from off-gas generated from the reformer;
a cooler connected to the CO2 PSA unit and configured to cool and liquefy the carbon dioxide extracted by the CO2 PSA unit using the LNG supplied from the LNG tank to the reformer;
a storage tank connected to the cooler and provided to store liquid carbon dioxide of the cooler therein;
a circulation pump provided to pump the liquid carbon dioxide from the cooler into the storage tank and to circulate a part of the liquid carbon oxide into the cooler;
a heat exchanger provided to allow heat exchange to be performed between the carbon dioxide supplied from the CO2 PSA unit to the cooler and the LNG supplied from the cooler to the reformer; and
a gaseous phase supply pipe which is connected between the storage tank and the cooler so that gaseous carbon dioxide in an upper portion of the storage tank is cooled and liquefied in the cooler,
wherein a vaporizer is provided between the reformer and the heat exchanger so that the LNG is supplied from the cooler to the reformer via the heat exchanger and the vaporizer.