84.混合溶媒による石炭の膨潤特性

抄録

The swelling characteristics of coal was examined by using the mixed solvent like methanol, acetone, 1-methylnaphtalene, tetralin and ethylenediamine. There are differences in the swelling ratios that depend on the kind of coal. However, the rise of the swelling ratios by the mixed solvents was shown in all coals used in this study. It is recognized that even if a large swelling ratio is not shown in the case of a simple pure solvent, it can increase by using the mixed solvents. Especially, the high swelling ratios were shown in the mixed solvents of methanol and 1-methylnaphtalene, and methanol, acetone, ethylenediamine and tetralin. It is suggested that as for the effect of the mixed solvent, the hydroxyl group of alcohol splits the hydrogen bonds of coal structure and the other bigger solvents of the higher molecular weight penetrates to the openings.