80 高温溶剤中で改質された褐炭の有効利用法の開発(熱分解・コークス(3))

概要

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We have been developing upgrading methods of brown coals utilizing solvent extraction at below 350℃. The residual coals as well as the extracts obtained by the methods contain much less oxygen and much more carbon than the raw brown coal. The volatile matters of the residual coals are much less than that of the raw coal. Since the ash contents of brown coals are often very low, the ash contents of residual coals are also very low. Therefore, the residual coals can be expected as a substitute of coking coals in a cokemaking process. Furthermore, a CO_2 gasification reaction rate was found to be higher for the residual coal than for the raw coal, indicating that the use of residual coal in cokemaking may enhance the gasification reactivity of the cokes. A coke prepared from blended coking coals with the residual coal of 5wt% gasified 1.4 times faster than a coke prepared from the blended coking coals without the residual coal.
一般社団法人日本エネルギー学会の論文
2008-10-09