Coal liquefaction by molybdenum catalyzed hydrogenation in the absence of solvent

摘要: Abstract Dry catalytic hydrogenation, using an impregnated molybdenum catalyst, has been used to explore the processes of coal liquefaction and their relation structure. It was found that for high activity must be present as MoS 2 conditions impregnation can strongly influence catalyst dispersion activity. At temperatures 400°C lower, a subbituminous more readily converted liquid products gases, than bituminous rank. The low-rank were comparatively richer in hydrogen, possessed higher oil asphaltene ratios aliphatic liquids. is considered reactivity attributable initial reactions being conducted under which promote hydrogenation while minimizing condensation cracking reactions. Examination reacted coals by reflected fluorescent light microscopy showed close correlation between yield extractable liquids maximum intensity vitrinite fluorescence. fluorescence appears directly related liberation relatively low molecular weight species within Coal pretreatment low-temperature dry prior temperature presence solvent, improved overall conversion product selectivity both coals. suggested subtle control lead efficient different