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Journal of Thermal Science

热科学学报

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2025 , Vol. 34 >Issue 4: 1554 - 1568

DOI: https://doi.org/10.1007/s11630-025-2149-7

CO2-Enhanced Tar-Rich Coal Pyrolysis to Produce High-Quality Oil and CO-Rich Gas

  • YANG Duoer ,
  • XU Bang ,
  • SUN Jihong ,
  • BAI Xiaoyan ,
  • DAI Fei ,
  • FAN Maohong
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  • 1. Beijing Key Laboratory for Green Catalysis and Separation, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
    2. China Coal Research Institute Corporation Ltd, Beijing 100083, China
    3. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    4. College of Engineering and Physical Sciences, School of Energy Resources, University of Wyoming, Laramie, WY 82071, USA
    5. College of Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

网络出版日期: 2025-07-04

基金资助

This work was supported by the Natural Science Foundation of China (Grant No. 22308012), and the National Key Laboratory of Efficient Exploitation and Clean Utilization of Coal Resources Open Fund Grant for General Project (2021-CMCU-KF005), and National Key Research and Development Program of China (No. 2023YFB4102600).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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CO2-Enhanced Tar-Rich Coal Pyrolysis to Produce High-Quality Oil and CO-Rich Gas

  • YANG Duoer ,
  • XU Bang ,
  • SUN Jihong ,
  • BAI Xiaoyan ,
  • DAI Fei ,
  • FAN Maohong
Expand
  • 1. Beijing Key Laboratory for Green Catalysis and Separation, Department of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
    2. China Coal Research Institute Corporation Ltd, Beijing 100083, China
    3. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    4. College of Engineering and Physical Sciences, School of Energy Resources, University of Wyoming, Laramie, WY 82071, USA
    5. College of Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA

Online published: 2025-07-04

Supported by

This work was supported by the Natural Science Foundation of China (Grant No. 22308012), and the National Key Laboratory of Efficient Exploitation and Clean Utilization of Coal Resources Open Fund Grant for General Project (2021-CMCU-KF005), and National Key Research and Development Program of China (No. 2023YFB4102600).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025
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摘要

本研究旨在为开发和利用CO2与富油煤热解生产高价值化学品和燃料的集成技术提供初步技术支撑。在固定床反应器中研究了富油煤在N2和N2/CO2气氛，不同温度(600°C~800°C)和常压条件下，热解产生焦油的化学性质。结果表明，与传统热解(在N2气氛下)相比，富油煤在CO2气氛下热解反应可促进焦油的产生(增加8.42 wt.%)，最大值可达21.26 wt.%。值得注意的是，通过增加热解气氛气体中CO2的浓度，可促进煤焦油和CO小分子气体的生成。气相色谱-质谱法和模拟蒸馏结果表明，CO2气氛可以促进酚、醇和烯烃等轻质组分的生成，同时抑制沥青等重质组分的生成。元素分析结果表明，在CO2气氛下，焦油中的H/C比值增加，表明焦油的品质得到了提高，这与模拟蒸馏和气相色谱-质谱测试的结果一致。最后，还提出了富油煤在CO2气氛下热解的可能反应途径。

关键词： tar-rich coal; pyrolysis; carbon dioxide atmosphere; oil production

本文引用格式

YANG Duoer , XU Bang , SUN Jihong , BAI Xiaoyan , DAI Fei , FAN Maohong . CO2-Enhanced Tar-Rich Coal Pyrolysis to Produce High-Quality Oil and CO-Rich Gas[J]. 热科学学报, 2025 , 34(4) : 1554 -1568 . DOI: 10.1007/s11630-025-2149-7

Abstract

The present work aims to provide preliminary support and research foundation for developing integrated technology of CO2 utilization and tar-rich coal pyrolysis to produce high-value chemicals and fuels. The chemical properties of tar produced by tar-rich coal pyrolysis under traditional N2 and N2/CO2 atmospheres were investigated in a fixed-bed reactor at different temperatures (600°C–800°C) and atmospheric pressures. The results showed that tar-rich coal pyrolysis under CO2 atmosphere can promote tar production (mass fraction 8.42% increased) compared with that of traditional pyrolysis (under N2), with the maximum value up to 21.26% (in weight). It should be noted that the generation of coal tar and CO small molecule gas can be promoted by increasing the concentrations of CO2 in pyrolysis atmosphere gases. GC-MS and simulated distillation results showed that the CO2 atmosphere can promote the production of light oil components such as phenols, alcohols, and olefins, while inhibiting the production of heavy components such as asphalt simultaneously. Elemental analysis results showed the H/C ratio of coal tar increased under CO2 atmosphere indicating that the high quality of coal tar is improved, which is consistent with that of simulated distillation and GC-MS test. Finally, a possible reaction pathway of tar-rich coal under CO2 atmosphere pyrolysis is also proposed.

Key words： tar-rich coal; pyrolysis; carbon dioxide atmosphere; oil production

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