Chemical composition and structure characterization of distillation residues of middle-temperature coal tar

doi:10.1016/j.cjche.2016.12.007

›› 2017, Vol. 25 ›› Issue (6): 815-820.DOI: 10.1016/j.cjche.2016.12.007

• Energy, Resources and Environmental Technology • 上一篇下一篇

Chemical composition and structure characterization of distillation residues of middle-temperature coal tar

Zhihui Sun, Weihong Zhang

School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, China

收稿日期:2016-09-08 修回日期:2016-12-22 出版日期:2017-06-28 发布日期:2017-08-02
通讯作者: Zhihui Sun,E-mail address:89186489@qq.com
基金资助:
Supported by the Natural Science Basic Research Plan in Shaanxi Province of China (2016JM5024), Scientific Research Program of Shaanxi Provincial Education Department (14JK1801) and Xianyang Normal University Special Research Fund (15XSYK040).

Chemical composition and structure characterization of distillation residues of middle-temperature coal tar

Zhihui Sun, Weihong Zhang

School of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, China

Received:2016-09-08 Revised:2016-12-22 Online:2017-06-28 Published:2017-08-02
Supported by:
Supported by the Natural Science Basic Research Plan in Shaanxi Province of China (2016JM5024), Scientific Research Program of Shaanxi Provincial Education Department (14JK1801) and Xianyang Normal University Special Research Fund (15XSYK040).

摘要/Abstract

摘要： The distillation residues of middle-temperature coal tar (DRMCT) were separated into saturate, aromatic, resin and asphaltene fractions by using the combination of solvent extraction and column chromatography separation. The isolated four fractions have been further characterized through the combination of elemental analysis, Fourier transform infrared (FTIR) spectra, proton nuclear magnetic resonance spectrum (¹H NMR) and molecular weight analysis. The analysis results confirm the view that the saturate fraction from DRMCT was mainly composed of long-chain alkanes and almost all of the heteroatoms (S, N and O) were existed in aromatic structures. The asphaltene fraction had the highest molecular weight, the most amount of heteroatom (especially oxygen) and was the most condensed with shortest alkyl side chains among all the fractions. In addition, for the heavier components, the resin and asphaltene fractions from DRMCT contained lower ratio of H/C, lower molecular weight and higher aromaticity degree when compared with crude oils.

关键词: Coal tar, Separation, Characterization, Composition, Structure

Abstract: The distillation residues of middle-temperature coal tar (DRMCT) were separated into saturate, aromatic, resin and asphaltene fractions by using the combination of solvent extraction and column chromatography separation. The isolated four fractions have been further characterized through the combination of elemental analysis, Fourier transform infrared (FTIR) spectra, proton nuclear magnetic resonance spectrum (¹H NMR) and molecular weight analysis. The analysis results confirm the view that the saturate fraction from DRMCT was mainly composed of long-chain alkanes and almost all of the heteroatoms (S, N and O) were existed in aromatic structures. The asphaltene fraction had the highest molecular weight, the most amount of heteroatom (especially oxygen) and was the most condensed with shortest alkyl side chains among all the fractions. In addition, for the heavier components, the resin and asphaltene fractions from DRMCT contained lower ratio of H/C, lower molecular weight and higher aromaticity degree when compared with crude oils.

Key words: Coal tar, Separation, Characterization, Composition, Structure

Zhihui Sun, Weihong Zhang. Chemical composition and structure characterization of distillation residues of middle-temperature coal tar[J]. , 2017, 25(6): 815-820.

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Chemical composition and structure characterization of distillation residues of middle-temperature coal tar

Chemical composition and structure characterization of distillation residues of middle-temperature coal tar

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