Abstract
For a better understanding of coal liquefaction reaction in 0.1 t/d continuous flow unit of direct coal liquefaction operated at Government Industrial Development Laboratory, Hokkaido, it became necessary to investigate the effect of coal rank/coal particle size on coal hydrogenation with vehicle oil. In the present study, 3 Hokkaido coals of different ranks were scrutinized and the effect of coal particle size on coal hydrogenation with vehicle oil was studied. As a result, it was shown that in Hokkaido coals with a carbon content of 73.0% to 87.4% the effect of coal particle size on conversion was not recognized when coal particles wer pulverized up to ca. 48 mesh (weight mean diameter: 0.102-0.121mm) in the preparation of coal pastes.
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