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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Carbon deposition and phase transformations in red mud on exposure to methane
Journal of Hazardous Materials, Volume 180, No. 1-3, Year 2010
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Description
A characterization study detailing the phase transformations and microstructural nature of the carbon deposited during methane decomposition over red mud has been undertaken. In situ XRD was carried out to study the phase transformation sequences of red mud during the reaction. Scanning electron microscopy, high resolution transmission electron microscopy, thermogravimetric analysis, BET surface area determination and CHN analysis were carried out to investigate the properties of the post-reaction samples. Exposure to methane with increasing temperature caused a stepwise reduction of iron oxides in red mud and promoted methane cracking leading to carbon deposition. The presence of carbon nanostructures was confirmed by HRTEM observations. The carbon formed was graphitic in nature and the spent red mud, rich in Fe and Fe3C formed as a result of the reduction of the iron oxide, was magnetic in nature. The surface area of the material was enhanced upon reaction. In addition, reactivity comparisons between goethite and red mud were carried out to study the formation of carbon oxides during reaction. © 2010 Elsevier B.V.
Authors & Co-Authors
Sushil, S.
India, New Delhi
Teri School of Advanced Studies
Alabdulrahman, Abdullah M.S.
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
Balakrishnan, M.
India, New Delhi
Teri School of Advanced Studies
Batra, V. S.
India, New Delhi
Teri School of Advanced Studies
Blackley, R. A.
United Kingdom, St Andrews
University of st Andrews
Clapp, J.
United Kingdom, Glasgow
University of Glasgow
Hargreaves, Justin S.J.
United Kingdom, Glasgow
University of Glasgow
Monaghan, A.
United Kingdom, Glasgow
University of Glasgow
Pulford, Ian D.
United Kingdom, Glasgow
University of Glasgow
Rico, J. L.
Mexico, Morelia
Universidad Michoacana de San Nicolás de Hidalgo
Zhou, W.
United Kingdom, St Andrews
University of st Andrews
Statistics
Citations: 49
Authors: 11
Affiliations: 5
Identifiers
Doi:
10.1016/j.jhazmat.2010.04.046
ISSN:
03043894
Research Areas
Environmental