Mathematical modelling of demineralisation of high sulphur coal by bioleaching

Weerasekara, N. S., Frutos, F. J. Garcia, Carac, J. and Lockwood, F. C. (2008) Mathematical modelling of demineralisation of high sulphur coal by bioleaching. Minerals Engineering, 21 3: 234-240. doi:10.1016/j.mineng.2007.10.007

Author Weerasekara, N. S.
Frutos, F. J. Garcia
Carac, J.
Lockwood, F. C.
Title Mathematical modelling of demineralisation of high sulphur coal by bioleaching
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2008-02
Sub-type Article (original research)
DOI 10.1016/j.mineng.2007.10.007
Volume 21
Issue 3
Start page 234
End page 240
Total pages 7
Place of publication Oxford, London, U.K.
Publisher Pergamon
Language eng
Subject 0914 Resources Engineering and Extractive Metallurgy
Abstract During coal combustion various toxic compounds are generated from its sulphur content. Their environmental impacts are considered to be very important. While there are various conventional preparation methods to remove the sulphur in the fuel, recent work reveals that newly-isolated micro-organisms, naturally present in coal, have the ability to reduce its sulphur content. The removal of sulphur using biological leaching involving acidophilic iron oxidising bacteria like Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans are examined and a computational technique based on computational fluid dynamics is developed to model the biological leaching of sulphur from coal. The model was validated against a pack-column experiment carried out for iron separation during 60 days. The mathematical model predicted iron separation over time is similar to experimental measurements, with an average difference of 5.5%. According to the experimental results, there was an overall reduction of 33% of pyrite, whereas the model prediction was 32%. The model results shows overall good agreement with pack-column experimental data.
Keyword Bioleaching
Computational fluid dynamics
Iron oxidation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
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Created: Tue, 12 Jan 2010, 10:09:47 EST by Michael Affleck on behalf of Sustainable Minerals Institute