Abstract
The effect of temperature, pressure, solvent/coal ratio and reaction time on supercritical toluene dissolution of an Illinois No. 6 are reported in this Paper. The experiments were conducted in a batch autoclave operating at temperatures ranging between 350 and 450 °C and pressures between 5.89 and 16 MPa. Low liquid yields in the range of 5–20% were obtained during toluene extraction. The liquid yields increase with temperature and total pressure, and only slightly with hydrogen partial pressure. Ethanol extraction gives better yields but significant solvent losses also occurred. The low liquid yield obtained can be attributed to the nature of the coal and the contacting batch mode used.
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