American Journal of Chemical Engineering

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Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite

Received: 24 October 2018    Accepted: 20 November 2018    Published: 24 December 2018
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Abstract

In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.

DOI 10.11648/j.ajche.20180606.11
Published in American Journal of Chemical Engineering (Volume 6, Issue 6, November 2018)
Page(s) 121-125
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Lignite, Supercritical Ethanol, Deoxygenation Rate, Solid Product Yield, Phenols, Esters

References
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[5] Xia Hao, Liu Quanrun, Ma Mingjie, Progress of lignite upgrading technology [J]. Clean Coal Technology, 2010, 16(4):56-58.
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[8] Luan Haiyan, Wang Aiguo, Zhang Qian, et al. Study on supercritical methanol treatment to remove oxide from lignite [J]. Coal Conversion, 2012, 35(4):30-34.
[9] Zhang Qian, Wang Aiguo, Luan Haiyan, et al. Experiment Study on Supercritical Methanol Affected to Pre-treatment of Lignite Liquefaction [J]. Coal Engineering, 2013, 45(3):113-116.
[10] [10] Bunyakiat K, Makmee S, Ruengwit Sawangkeaw A, et al. Continuous Production of Biodiesel via Transesterification from Vegetable Oils in Supercritical Methanol [J]. Energy Fuels, 2006, 20(2):812-817.
[11] Zhou GuoJiang, Su Jun, et al. Effect of water-heat treatment on properties of lignite and compressive strength of briquettes [J]. Jounal of Heilongjiang Institute of Science & Technology, 2010, 20(2):107-110.
[12] Zhu Xuedong, Zhu Zibin. Quantitative Determination of Oxygen-Containing Functional Groups in Coal by FTIR Spectroscopy [J]. Journal of Fuel Chemistry and Technology, 1999(4):335-339.
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[15] Ashida R, Nakgawa K, Oga M, et al. Fractionation of coal by use of high temperature solvent extraction technique and characterization of the fractions [J]. Fuel, 2008, 87(4–5):576-582.
[16] Wang Yugao, Wei Xianyong, Li Peng, et al. Mechanism analysis for supercritical ethanolysis of Huolinguole lignite [J]. Journal of Fuel Chemistry and Technology, 2012, 40(3):263-266.
Author Information
  • China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

  • China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

  • China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

  • China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

  • China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

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    Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. (2018). Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. American Journal of Chemical Engineering, 6(6), 121-125. https://doi.org/10.11648/j.ajche.20180606.11

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    ACS Style

    Zhou Jianming; Hu Xiuxiu; Wang Yiwei; Rao Tianxi; Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am. J. Chem. Eng. 2018, 6(6), 121-125. doi: 10.11648/j.ajche.20180606.11

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    AMA Style

    Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am J Chem Eng. 2018;6(6):121-125. doi: 10.11648/j.ajche.20180606.11

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  • @article{10.11648/j.ajche.20180606.11,
      author = {Zhou Jianming and Hu Xiuxiu and Wang Yiwei and Rao Tianxi and Xu Deping},
      title = {Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite},
      journal = {American Journal of Chemical Engineering},
      volume = {6},
      number = {6},
      pages = {121-125},
      doi = {10.11648/j.ajche.20180606.11},
      url = {https://doi.org/10.11648/j.ajche.20180606.11},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajche.20180606.11},
      abstract = {In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite
    AU  - Zhou Jianming
    AU  - Hu Xiuxiu
    AU  - Wang Yiwei
    AU  - Rao Tianxi
    AU  - Xu Deping
    Y1  - 2018/12/24
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ajche.20180606.11
    DO  - 10.11648/j.ajche.20180606.11
    T2  - American Journal of Chemical Engineering
    JF  - American Journal of Chemical Engineering
    JO  - American Journal of Chemical Engineering
    SP  - 121
    EP  - 125
    PB  - Science Publishing Group
    SN  - 2330-8613
    UR  - https://doi.org/10.11648/j.ajche.20180606.11
    AB  - In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.
    VL  - 6
    IS  - 6
    ER  - 

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