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

Title
Feasibility of on-board hydrogen production from hydrolysis of Al-Fe alloy for PEMFCs
Authors
엄광섭조은애권혁상
Keywords
Aluminum; AleFe alloy; Hydrogen generation; Hydrolysis; On-board hydrogen production; PEMFC
Issue Date
2011-09
Publisher
International journal of hydrogen energy
Citation
VOL 36, NO 19, 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 AleFe alloys is supplied directly to a PEMFC. The weight-normalized hydrogen generation rate of sheet Ale1Fe is higher than that of cubic Ale1Fe alloy, and its hydrogen generation rate changes little during hydrolysis in alkali water. Furthermore, during the hydrolysis reaction, the water temperature is stable. Hence, Ale1Fe in sheet form is suitable as a source for onboard 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 Ale1Fe. It is particularly notable that on-board hydrogen production using the hydrolysis of AleFe alloy exhibits self-humidification, supplying humidity automatically without a humidifier.
URI
http://pubs.kist.re.kr/handle/201004/41274
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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