The Hydrogenolysis Reaction Mechanism of Sohya Coal

概要

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High pressure hydrogenolysis reaction was carried out on Sohya coal (Tempoku) and the various structural parameters of the reaction products were obtained. Based on a follow up of the changes accompanying the reaction, an analysis of hydrogenolytic reaction mechanism of Sohya coal and chemical structure characteristics were discussed and the following conclusions were led forth.<BR>In the hydrogenolysis of Sohya coal under conditions of reaction temperature at 400°C and reaction pressure of 220kg/cm<SUP>2</SUP>, it was considered that an in parallel progress of saturation and decomposition of the aromatic condensed ring, cleavage of structural unit bond, dealkylation reaction was present. It was also recognized that the hydrogenolytic reactivity of Sohya coal was higher as compared with other Hokkaido coals. In addition in the present study in which vehicle oil is not used, at the initial stages of the reaction the progress of the reaction which directly produces oil from coal is seen and it is surmized that a successive decomposition reaction proceeds following the above, from coal→asphaltene→oil.<BR>The mean number of aromatic condensed rings of the strucutral unit of the main portion of Sohya coal is 2 or thereabouts, and the hydrocarbon side chain is shorter compared with other Hokkaido coals with an average carbon number of 1.6 or thereabouts.
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