Chemical beneficiation of coal with aqueous hydrogen peroxide/sulphuric acid solutions |
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Authors: | Nicholas P Vasilakos Cathy S Clinton |
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Affiliation: | Department of Chemical Engineering, University of Texas, Austin, TX 78712, USA |
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Abstract: | The removal of sulphur and ash from coal treated with aqueous hydrogen peroxide/sulphuric acid solutions has been studied at ambient temperature, under a variety of experimental conditions. Almost complete elimination of the sulphate and the pyritic sulphur was observed in most cases, as well as substantial reduction in the ash content. The other components of the organic coal matrix were not affected to a significant extent, indicating high selectivity of the system towards sulphur oxidation. An optimal H2SO4 concentration was established, above which the acid was found to have an adverse effect on the oxidation of pyrite by hydrogen peroxide. |
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Keywords: | coal chemical beneficiation hydrogen peroxide/sulphuric acid solutions |
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