Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H<sub>2</sub>O composite solvent

WANG Yewen; CHEN Mengyao; ZHANG Qianxia; SONG Yuncai; FENG Jie; Wen-Ying Li

doi:10.11949/0438-1157.20260329

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Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H₂O composite solvent

更新时间：2026-07-03

- Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H₂O composite solvent
- CIESC Journal (2026)
- 作者机构：
  
  1.太原理工大学省部共建煤基能源清洁高效利用国家重点实验室，山西太原 030024
  2.北京怀柔实验室，北京 101499
  3.怀柔实验室山西研究院，山西太原 030032
  4.中国科学院煤炭高效低碳利用全国重点实验室，山西太原 030001
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260329
  CLC： TQ 028.1
- Received：18 March 2026，
  
  Revised：2026-06-23，
  
  Accepted：03 July 2026，
- 稿件说明：
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WANG Yewen, CHEN Mengyao, ZHANG Qianxia, et al. Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H₂O composite solvent[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260329.
DOI：

WANG Yewen, CHEN Mengyao, ZHANG Qianxia, et al. Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H₂O composite solvent[J/OL]. CIESC Journal, 2026. DOI: 10.11949/0438-1157.20260329. DOI：

摘要

煤直接液化油组成复杂，其中烷烃、芳烃和酚类化合物的分离是实现其高值化利用的关键。然而，工业上常用的萃取剂，例如二甲基亚砜（DMSO）并不能实现芳烃和酚类化合物高纯度分离的要求，难以达到液化油组分精细分离的目的。针对上述问题，基于DMSO与H

O的相互作用，本文提出了一种DMSO/H

O分级萃取方法。结果表明，由于加入的H

O能与DMSO和酚类化合物形成氢键，进一步将H

O作为助萃取剂引入体系后，可显著增强DMSO对酚类组分的选择性，进而可实现芳烃与酚类的高效分离。实验结果表明，在DMSO/煤直接液化油馏分油质量比为4:1、复合萃取剂中H

O含量为40 wt%的条件下，烷烃、芳烃和酚类组分的纯度得到显著提升，烷烃组分中烷烃的质量分数达到70.13%，芳烃组分中芳烃的质量分数达到86.49%，酚类组分中酚类的质量分数达到83.22%。此外，通过从分子间弱相互作用的角度分析DMSO/H

O复合萃取剂与芳烃、酚类之间作用类型的差异，明确了酚类与复合萃取剂间的氢键作用是实现选择性分离的关键。

Abstract

The composition of direct coal liquefaction oil is complex

and the separation of alkanes

aromatics

and phenols is key to achieving its high-value utilization. However

extractants commonly used in industry

such as dimethyl sulfoxide (DMSO)

cannot meet the requirements for the high-purity separation of aromatics and phenols

making it difficult to achieve the fine separation of liquefaction oil components. To address this issue

based on the interaction between DMSO and H

this paper proposes a DMSO/H

O hierarchical extracti

on method. The results indicated that since the added H

O can form hydrogen bonds with DMSO and phenols

the introduction of H

O as a co-extractant significantly enhanced the selectivity of DMSO toward phenols

thereby enabling efficient separation of aromatics and phenols. Experimental results showed that under the conditions of the mass ratio of DMSO to direct coal liquefaction oil fraction is 4:1 and the H

O content of 40 wt% in the composite extractant

the purity of alkanes

aromatics and phenols has been significantly improved. The mass fraction of alkanes in the alkane component reached 70.13%

the mass fraction of aromatics in the aromatic component reached 86.49%

and the mass fraction of phenols in the phenolic component reached 83.22%. Furthermore

from the perspective of intermolecular weak interactions

this study analyzed the difference in interaction types between the DMSO/H

O composite extractant and aromatics/phenols

confirming that the hydrogen bonding between phenols and the composite extractant was the key to achieving selective separation.

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Keywords

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Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H2O composite solvent

DOI：10.11949/0438-1157.20260329

摘要

Abstract

关键词

Keywords

references

Selective separation mechanism of aromatics and phenols from direct coal liquefaction oil using DMSO/H₂O composite solvent