Supercritical fluid extraction and fractionation of high-temperature coal tar

被引：2
|
作者：
Ding Y.-H. [1 ]
Chen H. [1 ]
Wang D.-F. [1 ,2 ]
Ma W.-G. [1 ]
Wang J.-F. [1 ]
Xu D.-P. [1 ]
Wang Y.-G. [1 ]
机构：
[1] School of Chemical and Environmental Engineering, China University of Mining Technology(Beijing)
[2] Centre of Technology, Lu'an Mining Industry Group Co. Ltd.
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2010年 / 38卷 / 02期
关键词：
High-temperature coal tar; N-pentane; Supercritical extraction and fractionation;
D O I：
10.1016/s1872-5813(10)60027-8
中图分类号：
学科分类号：
摘要：
The high-temperature coal tar sample was separated into 10 narrow oil fractions and one solid-phase pitch product by supercritical fluid extraction and fractionation using n-pentane as solvent at 220°C and pressure from 5MPa to 15MPa. Results show that the accumulative yields increase with the extract pressure especially at the lower pressures, and the yield increase rate decrease gradually. The total yield of the oil extract is 78.36%, and the raffinate pitch yield is 21.64% which is far below that of the conventional distillation. Elemental analysis and chromatograph-mass spectrometer analysis show that with the increase of the extraction pressure, the atomic ratio of carbon to hydrogen, the average ring numbers, as well as the average molecular weight of narrow oil fractions increase gradually.
引用
收藏
页码：140 / 143
页数：3
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