SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 76 ›› Issue (12): 135-146.DOI: 10.1016/j.cjche.2024.08.012

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Effect of introducing oxygen into ethylene tar pitches on their carbonaceous products

Rongqi Chen, Yongzheng Zhang, Yanli Wang, Chunyin Shen, Liang Zhan, Licheng Ling   

  1. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • 收稿日期:2024-06-12 修回日期:2024-08-03 接受日期:2024-08-28 出版日期:2024-12-28 发布日期:2024-10-16
  • 通讯作者: Yongzheng Zhang,E-mail:zhangyongzheng@ecust.edu.cn;Yanli Wang,E-mail:ylwang@ecust.edu.cn;Liang Zhan,E-mail:zhanliang@ecust.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (22075081, 52372045 and U1710252), the Fundamental Research Funds for the Central Universities (JKD01231701), China Postdoctoral Science Foundation (2023M731084), Shanghai Sailing Program of China (23YF1408900).

Effect of introducing oxygen into ethylene tar pitches on their carbonaceous products

Rongqi Chen, Yongzheng Zhang, Yanli Wang, Chunyin Shen, Liang Zhan, Licheng Ling   

  1. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Key Laboratory of Specially Functional Polymeric Materials and Related Technology (Ministry of Education), Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2024-06-12 Revised:2024-08-03 Accepted:2024-08-28 Online:2024-12-28 Published:2024-10-16
  • Contact: Yongzheng Zhang,E-mail:zhangyongzheng@ecust.edu.cn;Yanli Wang,E-mail:ylwang@ecust.edu.cn;Liang Zhan,E-mail:zhanliang@ecust.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (22075081, 52372045 and U1710252), the Fundamental Research Funds for the Central Universities (JKD01231701), China Postdoctoral Science Foundation (2023M731084), Shanghai Sailing Program of China (23YF1408900).

摘要: Ethylene tar is a prospective precursor for preparing carbonaceous materials, which is regarded as a representative soft carbon material after carbonization. However, the introduction of oxygen can influence the morphology of the final carbonaceous materials. For the introduction of oxygen, dealkylation and dehydrogenation will be promoted and the molecules can be linked more effectively. For the subsequent carbonization, the biphenyl structures caused by the deoxygenation via the elimination of CO2, as well as the reserved aromatic ether bonds, can facilitate the strong cross-linking, which will restrain the movement of the carbon layers and the formation of the graphitic structures. After the graphitization treatment at 2800 ℃, the oxidized pitch can lead to short-range ordered and long-range unordered structures, while the sample without oxidation can result in long-range ordered graphitic structures. It can be proved that a simple oxidation-carbonization treatment can transform ethylene tar into hard carbon structures.

关键词: Fuel, Oxidation, Ethylene tar pitch, Carbonization, Hard carbon, Chemical processes

Abstract: Ethylene tar is a prospective precursor for preparing carbonaceous materials, which is regarded as a representative soft carbon material after carbonization. However, the introduction of oxygen can influence the morphology of the final carbonaceous materials. For the introduction of oxygen, dealkylation and dehydrogenation will be promoted and the molecules can be linked more effectively. For the subsequent carbonization, the biphenyl structures caused by the deoxygenation via the elimination of CO2, as well as the reserved aromatic ether bonds, can facilitate the strong cross-linking, which will restrain the movement of the carbon layers and the formation of the graphitic structures. After the graphitization treatment at 2800 ℃, the oxidized pitch can lead to short-range ordered and long-range unordered structures, while the sample without oxidation can result in long-range ordered graphitic structures. It can be proved that a simple oxidation-carbonization treatment can transform ethylene tar into hard carbon structures.

Key words: Fuel, Oxidation, Ethylene tar pitch, Carbonization, Hard carbon, Chemical processes