LIQUEFACTION BEHAVIOR OF THE MACERAL GROUPS IN POINT-OF-AYR COAL USING HYDROGENATED ANTHRACENE OIL IN A TUBING BOMB AT VARYING TEMPERATURES

Point of Ayr bituminous coal was liquefied in hydrogenated anthracene oil in a tubing bomb over a range of temperatures (300-450 degrees C, at 25 degrees C increments). The residual material was investigated mi croscopically to determine the volume percentage of various residues a nd conversion ratio. The hydrogenation behavior of each maceral group was investigated and it was found that the vitroplast formed from vitr inite has different optical features from that formed from liptinite, with the liquefaction of liptinite occurring mainly above 400 degrees C and that of vitrinites at lower temperatures, Two types of semicoke were recognized. The influence of temperature, residence time, and coa l/solvent ratio on coal conversion was examined and compared with the above behavior.