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Heat‐exchange pressure swing adsorption process for hydrogen separation
Author(s) -
Lee JangJae,
Kim MinKyu,
Lee DongGeun,
Ahn Hyungwoong,
Kim MyungJun,
Lee ChangHa
Publication year - 2008
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11544
Subject(s) - pressure swing adsorption , exothermic reaction , endothermic process , hydrogen , adsorption , chemistry , hydrogen fuel , heat exchanger , chemical engineering , desorption , thermodynamics , organic chemistry , engineering , physics
A current focus in the energy field is on the use of hydrogen in fuel cells. Development of a hydrogen station system is important to the commercialization of fuel cells and fuel cell powered vehicles. In this study, the heat‐exchange pressure swing adsorption (HE‐PSA) was developed to design a compact H 2 PSA process for small spatial occupancy in the hydrogen station. The adsorption dynamics and performance of the newly designed bed were compared with those of a conventional bed by using a quaternary mixture (H 2 /CO 2 /CH 4 /CO 69:26:3:2 vol %) which is generally obtained from the steam‐reforming reaction of natural gas. Because the detrimental exothermic/endothermic heat effects accompanied by the adsorption/desorption steps were reduced by heat exchange between the adsorption beds, the separation performance of the HE‐PSA was higher than that of a conventional PSA. In addition, the spatial occupancy of the beds could be significantly reduced, compared with a conventional PSA, because the single annular‐type bed performed the function of two beds in the HE‐PSA. © 2008 American Institute of Chemical Engineers AIChE J, 2008