An analysis of coal-liquefaction reactions by using the characterization chart.
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A coal-liquefaction reaction was analysed by using the characterization chart and the following results were obtained.<BR>1) A relationship between the aromaticity, fa, and the corrected atomic H/C ratio, (H/C) c, for coal-derived products agrees with that for various coals themselves. This fact suggests that the skelton structure of carbon-hydrogen for coal-derived products would be similar to these for coals. Hence it can be said that the deoxygenation reaction is one of important processes during the coal-liquefaction.<BR>2) It is shown that a coal consists of components whose reactivities change continuously and the thermal cracking to radicals takes place from the components with higher reactivity. The radicals are stabilized by hydrogen offered from a donor-solvent to produce preasphaltenes, asphaltenes and oils. Because of the unreacted-coal, the preasphaltenes and the asphaltenes are consecutively converted to give oils finally, oil yield increases with the increase of reaction time.<BR>On the other hand, the components with low reactivity remain in the unreacted coal, preasphaltenes and asphaltenes, and some of them do not produce radicals, even if the reaction conditions become more severe. The amount of these components is considered as unconvertible, and it is possible to make a rate equation where the coal liquefaction is correlated with the first-order irreversible reaction including the fractional ratio of unconvertibles.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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