煤直接液化过程结焦机理及影响因素研究进展

刘萌萌; 白宗庆; 李旺; 白进; 郭振兴; 李文

doi:10.11949/0438-1157.20260537

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煤直接液化过程结焦机理及影响因素研究进展

综述与专论 | 更新时间：2026-10-14

- 煤直接液化过程结焦机理及影响因素研究进展
- Research progress in coking mechanisms and influencing factors during direct coal liquefaction
- 化工学报 2026年77卷第9期页码：4983-4997
- 作者机构：
  
  1.中国科学院山西煤炭化学研究所煤炭高效低碳利用全国重点实验室，山西太原 030001
  2.中国科学院大学，北京 100049
- 作者简介：
  
  刘萌萌（2000—），女，硕士研究生，liumengmeng24@mails.ucas.ac.cn
  白宗庆（1979—），男，博士，研究员，baizq@sxicc.ac.cn
  白进（1981—），男，博士，研究员，stone@sxicc.ac.cn
- 基金信息：
  
  中国科学院基础与交叉前沿科研先导专项(XDB1190201;XDB1190202)
- DOI：10.11949/0438-1157.20260537
  中图分类号： TQ 529.1
- 收稿：2026-04-15，
  
  修回：2026-05-21，
  
  纸质出版：2026-09-25
- 稿件说明：
移动端阅览
刘萌萌, 白宗庆, 李旺, 白进, 郭振兴, 李文. 煤直接液化过程结焦机理及影响因素研究进展[J]. 化工学报, 2026, 77(9): 4983-4997

LIU Mengmeng, BAI Zongqing, LI Wang, BAI Jin, GUO Zhenxing, LI Wen. Research progress in coking mechanisms and influencing factors during direct coal liquefaction[J]. CIESC Journal, 2026, 77(9): 4983-4997
刘萌萌, 白宗庆, 李旺, 白进, 郭振兴, 李文. 煤直接液化过程结焦机理及影响因素研究进展[J]. 化工学报, 2026, 77(9): 4983-4997 DOI： 10.11949/0438-1157.20260537.

LIU Mengmeng, BAI Zongqing, LI Wang, BAI Jin, GUO Zhenxing, LI Wen. Research progress in coking mechanisms and influencing factors during direct coal liquefaction[J]. CIESC Journal, 2026, 77(9): 4983-4997 DOI： 10.11949/0438-1157.20260537.

摘要

煤直接液化技术是煤制液体燃料的重要技术路径，而液化过程中的结焦问题制约了反应装置的稳定运行与经济性。围绕煤直接液化过程中的结焦行为，系统梳理原料煤结构特征、重质中间体演化规律、自由基反应与氢供给之间的竞争关系以及焦炭的生成与沉积机理。在此基础上，总结煤种性质、溶剂性能、催化剂体系及工艺条件对结焦行为的影响规律，并归纳典型表征方法与评价手段。研究发现，煤直接液化结焦是自由基反应失衡、重质中间体持续缩聚和芳构化并逐步沉积的结果，通过优化供氢体系、强化催化剂H

活化和活性氢转移能力、促进重质中间体及时加氢转化，并优化温度、氢压、停留时间等工艺参数，实现对结焦行为的有效抑制。未来应加强自由基生成与氢转移过程的定量解析，明确重质中间体向焦炭沉积演化的关键步骤，并发展面向过程调控的跨尺度抑焦方法。

Abstract

Direct coal liquefaction (DCL) is an important route for converting coal into liquid fuels

whereas coking remains one of the main challenges for the stable and economic operation of reaction units. Existing studies indicate that coking is essentially governed by the imbalance between free radical formation and effective hydrogen stabilization. This imbalance leads to the accumulation of heavy intermediates

aromatization

and eventually resulting in coke deposition. This paper systematically reviews the structural characteristics of raw coal

the evolution of heavy intermediates

the competitive relationship between free radical reactions and hydrogen supply

and the formation and deposition mechanisms of coke

focusing on the coking behavior in direct coal liquefaction. In addition

the roles of coal properties

solvent performance

catalyst systems

and operating conditions are discussed

with typical characterization and evaluation methods summarized. Effective suppression of coking can be achieved by optimizing the hydrogen supply system

enhancing H

activation and active hydrogen transfer over the catalyst

promoting the timely upgrading of heavy intermediates

and matching process parameters such as temperature

hydrogen pressure and residence time. Future work should strengthen the quantitative analysis of free radical formation and hydrogen transfer

clarify the key control steps of the evolution of heavy intermediates into coke deposits

d develop cross-scale coking suppression methods for process regulation.

关键词

Keywords

references

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