Iron ochre: a pre-catalyst for the cracking of methane

Alharthi, A., Blackley, R. A., Flowers, T. H., Hargreaves, J. S.J. , Pulford, I. D., Wigzell, J. and Zhou, W. (2014) Iron ochre: a pre-catalyst for the cracking of methane. Journal of Chemical Technology and Biotechnology, 89(9), pp. 1317-1323. (doi:10.1002/jctb.4434)

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Publisher's URL: http://dx.doi.org/10.1002/jctb.4434

Abstract

Background: Iron ochres are gelatinous sludges which can cause problems in terms of water management. In this manuscript, the application of iron ochre obtained from a river has been applied to catalytically crack methane – another potential waste product - into two useful products, hydrogen and a magnetic carbon containing composite.<p></p> Results: The powder XRD pattern of the iron ochre was found to be consistent with the expected 2-line ferrihydrite and EDX analysis showed Fe to be a major component although some Si was present. The sample was observed to contain a fraction with a tubular morphology consistent with the presence of extra-cellular biogenic iron oxide formed by leptothrix. Upon exposure to methane at elevated temperatures, the material was found to transform into an active catalyst for hydrogen production yielding a magnetic carbon containing composite material comprising filamentous carbon and encapsulating graphite.<p></p> Conclusion: The application of two waste products – iron ochre and methane – to generate two useful products – hydrogen and a magnetic carbon containing composite- has been demonstrated. Furthermore, the ochre has been shown to comprise tubular morphology extra-cellular biogenic iron oxide which may be of interest in terms of other applications.<p></p>

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hargreaves, Professor Justin and Flowers, Dr Hugh
Authors: Alharthi, A., Blackley, R. A., Flowers, T. H., Hargreaves, J. S.J., Pulford, I. D., Wigzell, J., and Zhou, W.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of Chemical Technology and Biotechnology
Publisher:Wiley
ISSN:0268-2575
ISSN (Online):1097-4660
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in Journal of Chemical Technology and Biotechnology 89(9):1317-1323
Publisher Policy:Reproduced under a Creative Commons License

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