The Reaction of Steam and Extractive Chemical Disintegration Residues of Coals under Hydrogen Pressure:(II) Various Changes of the Properties of the Reaction Products with the Reaction Time and the Reaction Mechanism

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Following the previous report, the present work was undertaken to investigate the possibility of utilizing extractive chemical disintegration residues of coals under hydrogen pressure. Various changes of properties of the reaction products with the reaction time were studied after which the reaction mechanism involved in the changes was considered. As a result of our experiments, it was found that (a) Within a reaction temperature range of 600-950°C, it was noted that when the reaction temperature was low and the reaction time was long the surface area of the residue increased. But in the case of the Methylene blue absorbability, with higher reaction temperatures, the absorbability was highered. The properties of the reaction residues changed with the reaction time. (b) The ratio of the reaction gas constituent changed with the reaction time. The main reaction produced gases were H2, CO and CO2. Therefore the extractive chemical disintegration residues of coals may be used as raw material for the production of reducing gas. (c) From the experimental results, we assumed a sequence of the consequtive reactions of a zero order and caluculated the activation energies and the activation entropies. The changes with the progress of the reaction correspondeb to the observed results.
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