Fractionation of coal by use of high temperature solvent extraction technique and characterization of the fractions
Fractionation of coal by use of high temperature solvent extraction technique and characterization of the fractions
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DOI：
10.1016/j.fuel.2007.02.035
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发表时间：
2008-04-01
期刊：
影响因子：
7.4
通讯作者：
Miura, Kouichi
中科院分区：
文献类型：
--
作者：
Ashida, Ryuichi;Nakgawa, Kyosuke;Miura, Kouichi
作者最近提出了一种新的煤分馏方法，可以将烟煤分离成几个馏分，就像石油蒸馏一样，而不分解煤。本文对两种烟煤和一种褐煤进行了实验研究。在低于350 ℃的不同温度下连续溶剂萃取成功地将两种烟煤分离成具有不同分子量化合物的几个馏分。由于所有提取的馏分几乎不含矿物质，并且发现一些馏分在加热时像合成沥青一样可熔融，因此研究了从煤馏分生产高性能炭材料的可能性。另一方面，通过连续溶剂萃取从褐煤中获得的馏分在化学组成和分子量方面都非常接近，尽管连续萃取可以大大抑制褐煤在350 ℃以下的分解。烟煤和褐煤在萃取性能上的差异是由于它们的化学结构不同。(c)2007爱思唯尔有限公司保留所有权利。
The authors have recently presented a new coal fractionation method that can separate a bituminous coal into several fractions, just like petroleum distillation, without decomposing coal. In this paper this method was applied to two bituminous coals and a brown coal. Sequential solvent extraction at different temperatures lower than 350 degrees C successfully separated the two bituminous coals into several fractions having different molecular mass compounds. Since all the extracted fractions are almost free from mineral matter, and some fractions were found to be fusible like a synthesized pitch when heated, the possibility of producing high performance carbon materials from the coal fractions was investigated. On the other hand, fractions obtained from the brown coal by the sequential solvent extraction were very close in both chemical composition and molecular mass, although the sequential extraction could greatly suppress the decomposition of the brown coal below 350 degrees C. The difference in the extraction behavior between the bituminous coals and the brown coal were attributed to the difference in their chemical structure. (c) 2007 Elsevier Ltd. All rights reserved.