EFFECTS OF PARTICLE SIZE OF COAL ON HYDROGEN EXCHANGE REACTIONS OF COAL WITH TRITIATED GASEOUS HYDROGEN AND WATER

摘要

Recently, we have reported that the tritium tracer methods are effective to determine the amount of hydrogen in the functional group of coal through the reaction of coal with tritiated water and tritiated gaseous hydrogen in a pulse flow reactor as well as a batch reactor. In the reaction with tritiated water, it was assumed that protons were related to the hydrogen exchange of functional groups in coals. In the reaction with tritiated gaseous hydrogen, a Pt/Al_2O_3 catalyst was used to generate hydrogen radicals. In these studies, the direct non-destructive determination of hydrogen in coal with its original form was attained. However, the effect of the particle size of coal on the hydrogen exchange reaction has not been taken into account in these works. In this study, we carried out the hydrogen exchange of coal with tritiated gaseous hydrogen and water to confirm the effect of the particle size of coal on the hydrogen exchange.