1-s2.0-S0360319918339119-main.pdf (2.31 MB)
0/0

Synthesis of activated ferrosilicon-based microcomposites by ball milling and their hydrogen generation properties

Download (2.31 MB)
journal contribution
posted on 27.03.2018 by Paul Brack, Sandie Dann, Upul Wijayantha-Kahagala-Gamage, Paul L. Adcock, Simon E. Foster
Ferrosilicon was activated toward hydrogen generation by processing using ball milling. An activation energy of 62 kJ/mol was determined for the reaction of ball-milled ferrosilicon powder with sodium hydroxide solution, which is ca. 30 kJ/mol lower than that previously reported for unmilled ferrosilicon. A series of composite powders were prepared by ball milling ferrosilicon with various additives. Three different classes of additives were employed: salts, polymers and sugars. The effects of these additives on hydrogen generation from the reaction of ferrosilicon with 2 wt.% aqueous sodium hydroxide were investigated. It was found that composites formed of ferrosilicon and sodium chloride, potassium chloride, sodium polyacrylate, sodium polystyrene sulfonate-co-maleic acid or fructose showed reduced induction times for hydrogen generation compared to that observed for ferrosilicon alone, and all but fructose also led to an increase in the maximum hydrogen generation rate. In light of its low cost and toxicity and beneficial effects, sodium chloride is considered to be the most effective of these additives for activating ferrosilicon toward hydrogen generation.

Funding

This work was supported by the EPSRC and Intelligent Energy Ltd. PB would also like to thank the SCI for the award of a Messel Scholarship.

History

School

  • Science

Department

  • Chemistry

Published in

International Journal of Hydrogen Energy

Citation

BRACK, P. ...et al., 2018. Synthesis of activated ferrosilicon-based microcomposites by ball milling and their hydrogen generation properties. International Journal of Hydrogen Energy, 44 (35), pp.19113-19127.

Publisher

© Elsevier

Version

NA (Not Applicable or Unknown)

Publisher statement

This work is made available according to the conditions of 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/

Acceptance date

20/02/2018

Publication date

2019-01-04

Notes

This is an Open Access Article. It is published by Elsevier 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/

ISSN

0360-3199

Language

en

Licence

Exports

Logo branding

Licence

Exports