Feasibility of on-board hydrogen production from hydrolysis of Al-Fe alloy for PEMFCs

Authors
Eom, KwangSupCho, EunAeKwon, HyukSang
Issue Date
2011-09
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.19, pp.12338 - 12342
Abstract
The feasibility of using the hydrolysis of Al alloys in an on-board hydrogen generation system for PEMFCs is investigated. Hydrogen produced by the hydrolysis of Al-Fe alloys is supplied directly to a PEMFC. The weight-normalized hydrogen generation rate of sheet Al-1Fe is higher than that of cubic Al-1Fe alloy, and its hydrogen generation rate changes little during hydrolysis in alkali water. Furthermore, during the hydrolysis reaction, the water temperature is stable. Hence, Al-1Fe in sheet form is suitable as a source for on-board hydrogen production from hydrolysis in alkali water. At a current of 10 A, the PEMFC presents a voltage of about 0.71 V, which remains stable for 37 min. However, after 37 min, the cell voltage decreases dramatically to 0 V due to a reduction in hydrogen feeding rate by exhaustion of Al-1Fe. It is particularly notable that on-board hydrogen production using the hydrolysis of Al-Fe alloy exhibits self-humidification, supplying humidity automatically without a humidifier. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Keywords
FUEL-CELL; BOROHYDRIDE SOLUTION; SODIUM-BOROHYDRIDE; ALUMINUM-ALLOYS; GENERATION; KINETICS; FUEL-CELL; BOROHYDRIDE SOLUTION; SODIUM-BOROHYDRIDE; ALUMINUM-ALLOYS; GENERATION; KINETICS; Hydrogen generation; Hydrolysis; On-board hydrogen production; PEMFC; Aluminum; Al-Fe alloy
ISSN
0360-3199
URI
https://pubs.kist.re.kr/handle/201004/130036
DOI
10.1016/j.ijhydene.2011.06.099
Appears in Collections:
KIST Article > 2011
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