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Iron ochre – a pre-catalyst for the cracking of methane
BACKGROUND: Iron ochres are gelatinous sludges that can cause problems in terms of water management. In this work, 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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley & Sons, Ltd
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4280890/ https://www.ncbi.nlm.nih.gov/pubmed/25558121 http://dx.doi.org/10.1002/jctb.4434 |
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author | Alharthi, Abdulrahman Blackley, Ross A Flowers, T Hugh Hargreaves, Justin S J Pulford, Ian D Wigzell, James Zhou, Wuzong |
author_facet | Alharthi, Abdulrahman Blackley, Ross A Flowers, T Hugh Hargreaves, Justin S J Pulford, Ian D Wigzell, James Zhou, Wuzong |
author_sort | Alharthi, Abdulrahman |
collection | PubMed |
description | BACKGROUND: Iron ochres are gelatinous sludges that can cause problems in terms of water management. In this work, 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. RESULTS: The powder X-ray diffraction (XRD) pattern of the iron ochre was found to be consistent with the expected 2-line ferrihydrite, and energy dispersive X-ray (EDX) analysis showed Fe to be a major component although some Si and Ca were 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. 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. © 2014 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. |
format | Online Article Text |
id | pubmed-4280890 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | John Wiley & Sons, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-42808902015-01-02 Iron ochre – a pre-catalyst for the cracking of methane Alharthi, Abdulrahman Blackley, Ross A Flowers, T Hugh Hargreaves, Justin S J Pulford, Ian D Wigzell, James Zhou, Wuzong J Chem Technol Biotechnol Research Articles BACKGROUND: Iron ochres are gelatinous sludges that can cause problems in terms of water management. In this work, 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. RESULTS: The powder X-ray diffraction (XRD) pattern of the iron ochre was found to be consistent with the expected 2-line ferrihydrite, and energy dispersive X-ray (EDX) analysis showed Fe to be a major component although some Si and Ca were 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. 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. © 2014 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. John Wiley & Sons, Ltd 2014-09 2014-06-26 /pmc/articles/PMC4280890/ /pubmed/25558121 http://dx.doi.org/10.1002/jctb.4434 Text en © 2014 The Authors. Journal of Chemical Technology & Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. http://creativecommons.org/licenses/by/3.0/ 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. |
spellingShingle | Research Articles Alharthi, Abdulrahman Blackley, Ross A Flowers, T Hugh Hargreaves, Justin S J Pulford, Ian D Wigzell, James Zhou, Wuzong Iron ochre – a pre-catalyst for the cracking of methane |
title | Iron ochre – a pre-catalyst for the cracking of methane |
title_full | Iron ochre – a pre-catalyst for the cracking of methane |
title_fullStr | Iron ochre – a pre-catalyst for the cracking of methane |
title_full_unstemmed | Iron ochre – a pre-catalyst for the cracking of methane |
title_short | Iron ochre – a pre-catalyst for the cracking of methane |
title_sort | iron ochre – a pre-catalyst for the cracking of methane |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4280890/ https://www.ncbi.nlm.nih.gov/pubmed/25558121 http://dx.doi.org/10.1002/jctb.4434 |
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