Studies on High Pressure Hydrogenolysis of Coal by Differential Theramal Analysis

概要

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High pressure DTA was applied to study the reaction of coal hydrogenolysis with three catalysts. The relationship between the exothermic peak of the DTA curve and the distribution of coal hydrogenolysis products was discussed.<BR>In the case of hydrogenolysis of Sumiyoshi coal and Taiheiyo coal, exothermic peaks of the DTA curves were obtained in all catalysts used in this study but no apparent DTA peak was observed in any catalyst in case of Yubari coal.<BR>Based on the changes in the distribution of products of coal hydrogenolysis sampled at intervals in the course of the DTA curve, it was found that in the low temperature range of coal hydrogenolysis the production of asphaltene and oil formed exothermic peaks, and at the same time it was shown that the reaction producing asphaltene and oil in the high temperature range did not form exothermic peaks.<BR>The reaction heat calculated from the exothermic peak area of coal hydrogenolysis where coal is converted to the benzene soluble fraction ranged from 75 to 200cal/g.<BR>The average structural parameters of oil and asphaltene, sampled at intervals in the course of DTA curve, were studied by NMR and ultimate analysis. It was found that the exothermic peak was formed in the temperature range wheare the average numbers of the condensed aromatic rings of oil and asphaltene increased, gradually with raising the reaction temperature.
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