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

The distillation residues of middle-temperature coal tar （DRMCT） were separated into saturate, aromatic, resinand asphaltene fractions by using the combination of solvent extraction and column chromatography separation.The isolated four fractions have been further characterized through the combinati...

Full description

Saved in:
Bibliographic Details
Published in:Chinese journal of chemical engineering 2017-06, Vol.25 (6), p.815-820
Main Authors: Sun, Zhihui, Zhang, Weihong
Format: Article
Language:English
Subjects:
Characterization
Coal
Coal tar
Composition
Separation
Structure
tar
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The distillation residues of middle-temperature coal tar （DRMCT） were separated into saturate, aromatic, resinand 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 molecularweight analysis. The analysis results confirm the view that the saturate fraction from DRMCT was mainly com-posed 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 heaviercomponents, the resin and asphaltene fractions from DRMCT contained lower ratio of H/C, lower molecularweight and higher aromaticity degree when compared with crude oils.
ISSN:1004-9541
2210-321X
DOI:10.1016/j.cjche.2016.12.007