Mild Oxidation of Miike Coal with Air(III):The Variation of Coking-property by the Fluid Oxidation Method

概要

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There have been lots of studies so far on the oxidation of the surface of coal through the low-temperature heat treatment (lower than 400°C). Only a few research workers, however, are known to have published reports on the examined results of the mild oxidation with fluid method, for most of the existing processes of such oxidation are those which employ retort method or rotary kiln method. The reporters experimentally treated Miike Coal with heat between 190° and 430°C employing fluid method, and examined minutely the variation of its properties, especially its coking-property, as the temperature changed. Hitherto it has been a generally accepted idea that, in the case of perplastic coal such as Miike Coal, the cokingproperty is improved by the mild oxidation method. But as a matter of fact the effects of the mild oxidation on the coking-property are far from simple, so that it will be too much hasty to conclude that it is "improved" by such processes. From the results of their study, the reoprters infer that the low-temperature dry distillation is able to produce a better result on the transformation of superior coking coals than The mild oxidation.
一般社団法人日本エネルギー学会の論文