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Hydrogen Generation from Aqueous Acid-catalyzed Hydrolysis of Sodium Borohydride by Hyun Jae Kim; Kyoung-Jin Shin; Hyun-Jong Kim; M.K. Han; Hansung Kim; Yong-Gun Shul; Kyeong Taek Jung is a Engineering article available to read on EtoBox.

What is Hydrogen Generation from Aqueous Acid-catalyzed Hydrolysis of Sodium Borohydride about?

In this study, the hydrogen feed from both Ru-catalyzed and organic acid-catalyzed hydrolysis of NaBH 4 was studied in terms of hydrogen generation rate and integrated PEMFC performance. Hydrogen feed generated from the conventional Ru-catalyzed hydrolysis of NaBH 4 caused a drastic loss of PEMFC performance. It was found that the presence of sodium ion in hydrogen feed was a main factor that increased the interfacial resistance of fuel cell and, consequently, reduced the performance. Acid-catalyzed hydrolysis with powder form of NaBH 4 was adopted in order to minimize the detrimental effect of sodium ion. The hydrogen feed from acid-catalyzed hydrolysis was quite dry so that even water vapor, the carrier of sodium ion, was not detected after condensation of hydrogen feed. It was confirmed by the several experiments that the hydrogen release rate can be controlled by varying the injection rate and concentration of aqueous acid. Various organic acids were employed in the production of hydrogen and found that acidity, acid type and chemical structure are also important factors on hydrolysis of NaBH 4 . The performance from the integrated acid-catalyzed hydrogen generation system with

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Author

Hyun Jae Kim; Kyoung-Jin Shin; Hyun-Jong Kim; M.K. Han; Hansung Kim; Yong-Gun Shul; Kyeong Taek Jung

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0360-3199)

Published

2010

Language

EN

Field

Engineering (Physical Sciences)