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

Zhihui Sun; Weihong Zhang

doi:10.1016/j.cjche.2016.12.007

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

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Chemical composition and structure characterization of distillation residues of middle-temperature coal tar
- Chinese Journal of Chemical Engineering Issue 6, Pages: 815-820(2017)
- Affiliations：
  
  School of Chemistry and Chemical Engineering, Xianyang Normal University,Xianyang,China,712000
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.12.007
  CLC：
- Published：2017
- Accepted：
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Zhihui Sun, Weihong Zhang. Chemical composition and structure characterization of distillation residues of middle-temperature coal tar[J]. Chinese Journal of Chemical Engineering, 2017, (6): 815-820.
DOI：

Zhihui Sun, Weihong Zhang. Chemical composition and structure characterization of distillation residues of middle-temperature coal tar[J]. Chinese Journal of Chemical Engineering, 2017, (6): 815-820. DOI： 10.1016/j.cjche.2016.12.007.

摘要

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 (

H 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.

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