Composition of extraction products from alkylated high-sulphur coals |
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Authors: | Mieczysław Kozłowski Helena Wachowska Jan Yperman |
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Institution: | (1) Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland;(2) Laboratory of Applied Chemistry, CMK, Limburgs Universitair Centrum, B-3590 Diepenbeek, Belgium |
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Abstract: | Products of reductive and non-reductive methylation of two high-sulphur coals (Mequinenza and Illinois No. 6) have been extracted
by dichloromethane. It has been established that the efficiency of the transformation of coal to the products soluble in CH2Cl2 is higher for coals subjected to non-reductive methylation by the Liotta method than for those after reduction in the potassium/liquid
ammonia system. The extracts and the extraction residues were subjected to elemental analysis, IR spectroscopy, and AP-TPR
(Atmospheric Pressure-Temperature Programmed Reduction) measurements. It has been shown that the main species undergoing extraction
by CH2Cl2 are aliphatic compounds or aromatic structures of low degree of condensation. The effect of the extraction on the sulphur
groups in coal has been discussed. |
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Keywords: | coal alkylation extraction sulphur Atmospheric Pressure-Temperature Programmed Reduction |
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