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An old solution to a new problem? Hydrogen generation by the reaction of ferrosilicon with aqueous sodium hydroxide solutions

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journal contribution
posted on 20.01.2016, 16:21 by Paul Brack, Sandie DannSandie Dann, Upul Wijayantha-Kahagala-GamageUpul Wijayantha-Kahagala-Gamage, Simon E. Foster, Paul L. Adcock
The chemical hydrogen storage properties of ferrosilicon were investigated. A hydrogen yield of ~4.75 wt.% (with respect to the mass of ferrosilicon) was estimated by the reaction of varying quantities of ferrosilicon with 5 mL of 40 wt.% sodium hydroxide solution. The reaction of ferrosilicon with aqueous sodium hydroxide solution to form hydrogen was found to have an activation energy of 90.5 kJ mol −1 by means of an Arrhenius plot. It was observed that the induction period of the hydrogen generation reaction varies exponentially with temperature. Although this combination of high activation energy and a lengthy induction period at low temperatures reduces the attractiveness of ferrosilicon for portable hydrogen storage applications unless methods can be developed to accelerate the onset and rate of hydrogen generation, its low cost and widespread availability make it attractive for further studies focused on higher temperature stationary applications.

Funding

The authors would like to thank the Engineering and Physical Sciences Research Council (EPSRC) and Intelligent Energy Ltd for funding this project.

History

School

  • Science

Department

  • Chemistry

Published in

Engineering Science and Engineering

Citation

BRACK, P. ... et al, 2015. An old solution to a new problem? Hydrogen generation by the reaction of ferrosilicon with aqueous sodium hydroxide solutions. Energy Science and Engineering, 3 (6), pp.535-540

Publisher

Society of Chemical Industry and John Wiley & Sons Ltd (© The Authors)

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Publication date

2015

Notes

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Language

en