煤
碳化
碳纤维
材料科学
液化
煤液化
废物管理
城市固体废物
环境科学
复合材料
化学
有机化学
工程类
扫描电子显微镜
复合数
作者
John D. Craddock,G. T. Frank,Michela Martinelli,Justin Lacy,Vivian Edwards,A. Vego,Christina Thompson,Rodney Andrews,Matthew C. Weisenberger
出处
期刊:Carbon
[Elsevier]
日期:2023-11-01
卷期号:: 118590-118590
标识
DOI:10.1016/j.carbon.2023.118590
摘要
Traditionally, waste coal impoundments have been viewed as environmental liabilities. However, the results presented herein take advantage of the aromatic chemistry of the coal component and offer an attractive path towards the utilization of waste coal in value-added products. The solid material stored in waste coal impoundments is largely comprised of fine coal particles and mineral matter. This work focuses on separating and recovering the waste coal fraction from the other materials. Once isolated, the waste coal was subjected to direct coal liquefaction (DCL) to produce a coal extract liquid, which was subsequently filtered. The filtered coal extract was then vacuum distilled forming an isotropic pitch bottom product, which was then recovered and melt spun to produce green fibers. Thermal oxidation and carbonization produced isotropic carbon fibers from waste coal, which showed mechanical properties in-line with other general purpose carbon fibers.
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