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Title: Elucidating the process of hydrogen generation from the reaction of sodium hydroxide solution and ferrosilicon
Authors: Brack, Paul
Dann, Sandra E.
Wijayantha, K.G.U.
Adcock, Paul
Foster, Simon
Keywords: Chemical hydrogen storage
Ferrosilicon
Hydrogen generation
Hydrolysis
Issue Date: 2017
Publisher: © The Authors. Published by Wiley.
Citation: BRACK, P. ...et al., 2017. Elucidating the process of hydrogen generation from the reaction of sodium hydroxide solution and ferrosilicon. International Journal of Energy Research, 41 (12), pp. 1740–1748.
Abstract: For the first time, the process of hydrogen evolution from ferrosilicon 75 using sodium hydroxide solution has been investigated as a function of temperature using a combination of X-ray photoelectron spectroscopy, X-ray diffraction and physical measurements. Ferrosilicon 75, a mixture of silicon (~50wt.%) and iron disilicide (~50wt.%), has been shown to produce hydrogen by the action of sodium hydroxide solution on the silicon only, with the iron disilicide acting in the role of spectator/protector species for the silicon. Neither iron disilicide alone nor ferrosilicon 45, which does not contain a pure metallic silicon phase, was found to generate hydrogen under similar reaction conditions, further indicating that the presence of a pure metallic silicon phase is essential for hydrogen generation. As the iron disilicide acts as a diluent for the active silicon, it is hypothesized that this would result in a slower release of hydrogen than that which would be obtained from the reaction of silicon alone, which may be useful for applications which require a long-term, sustained release of hydrogen. A hydrogen yield of 462.5mL/g and a maximum hydrogen generation rate of 83mL/min g were obtained within 10min of reaction with 40wt.% NaOH at 348K.
Description: This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: The authors would like to thank the EPSRC and Intelligent Energy for funding this project.
Version: Published
DOI: 10.1002/er.3742
URI: https://dspace.lboro.ac.uk/2134/24800
Publisher Link: http://dx.doi.org/10.1002/er.3742
ISSN: 1099-114X
Appears in Collections:Published Articles (Chemistry)

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