US 11,654,414 B2
Hydrogen reforming system
Jung Joo Park, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Motors Corporation, Seoul (KR)
Filed on Jun. 29, 2020, as Appl. No. 16/915,324.
Claims priority of application No. 10-2020-0018113 (KR), filed on Feb. 14, 2020.
Prior Publication US 2021/0252471 A1, Aug. 19, 2021
Int. Cl. C01B 3/34 (2006.01); C01B 3/48 (2006.01); B01J 19/24 (2006.01); C01B 3/56 (2006.01); B01D 53/047 (2006.01); B01J 19/00 (2006.01)
CPC B01J 19/2445 (2013.01) [B01D 53/047 (2013.01); B01J 19/0013 (2013.01); C01B 3/48 (2013.01); C01B 3/56 (2013.01); B01D 2256/16 (2013.01); B01D 2257/30 (2013.01); B01D 2257/504 (2013.01); B01J 2219/00076 (2013.01); B01J 2219/00105 (2013.01); B01J 2219/00157 (2013.01); C01B 2203/0233 (2013.01); C01B 2203/0238 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/042 (2013.01); C01B 2203/0811 (2013.01); C01B 2203/0883 (2013.01); C01B 2203/127 (2013.01); C01B 2203/141 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A hydrogen reforming system comprising:
a steam reforming system configured to (i) receive a raw material gas and react the raw material gas with water to generate a first mixed gas containing hydrogen and carbon monoxide, (ii) react the first mixed gas with the water to generate hydrogen and carbon dioxide, and (iii) discharge hydrogen and carbon dioxide;
a dry reforming system configured to (i) receive and react the raw material gas and the carbon dioxide discharged from the steam reforming system to generate a second mixed gas containing hydrogen, (ii) react the second mixed gas with the water to generate hydrogen and carbon dioxide, and (iii) discharge hydrogen and carbon dioxide; and
a water supply device configured to supply the water to the steam reforming system and the dry reforming system,
wherein the steam reforming system comprises:
a steam reforming unit configured to react the raw material gas with the water to generate the first mixed gas containing hydrogen and carbon monoxide,
a first water gas shift unit in which a shift reaction converting water and carbon monoxide into hydrogen and carbon dioxide by reacting the first mixed gas discharged from the steam reforming unit with the water occurs, and
a first pressure swing adsorption (PSA) configured to separate hydrogen from gas discharged from the first water gas shift unit and discharge carbon dioxide, and
the dry reforming system comprises:
a dry reforming unit configured to receive carbon dioxide discharged from the first PSA and react carbon dioxide with the raw material gas to generate the second mixed gas containing hydrogen,
a second water gas shift unit in which a shift reaction converting water and carbon monoxide into hydrogen and carbon dioxide by reacting the second mixed gas discharged from the dry reforming unit with the water occurs, and
a second PSA configured to separate hydrogen from gas discharged from the second water gas shift unit;
wherein each of the steam reforming system and the dry reforming system comprises multiple heat exchange units configured to exchange heat with the water flowing through the water supply device,
wherein the multiple heat exchange units comprise:
a first heat exchange unit in which the first water gas shift unit exchanges heat with the water,
a second heat exchange unit in which the second water gas shift unit exchanges heat with the water,
a third heat exchange unit in which the steam reforming unit exchanges heat with the water, and
a fourth heat exchange unit in which the dry reforming unit exchanges heat with the water, and
wherein the water supply device is connected to the multiple heat exchange units so that the multiple heat exchange units exchange heat with the water, and the water is heated while passing through each heat exchange unit.