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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.

Published in American Journal of Chemical Engineering (Volume 6, Issue 6)
DOI 10.11648/j.ajche.20180606.11
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), 2018. 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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  • APA Style

    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://article.sciencepublishinggroup.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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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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