Abstract

A coal liquefaction process with bituminous coal has been developed as a part of a national project “SUNSHINE”, supervised by NEDO. In this process, Australian Wandoan coal has been considered as a promising raw material so that various studies have been done.For a better understanding of the liquefaction reaction behavior of Wandoan coal in continuous flow unit, effects of reaction time and the duplicate reactors on products yield were studied. Furthermore, the change of coal particle size distributions with reaction time were also investigated.As one of the investigations of reaction time, a series of experiments of ultra-short con-tact time reaction (about 15 seconds) were carried out. From these experiments, it was clarified that the decomposition of coal particles were remarkably proceeded even under ultra-short contact conditions so that a coal particle with the size of 100μm was immediately smashed into over 20 fragments with around 30% of that converted to distillable oil products and that there was no effect of catalyst in this stage.It was also confirmed that resid yield was decreased but oil yield was increased according to the number of reactors from single to duplicate.

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