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Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction

Received: 2 July 2017    Accepted: 2 August 2017    Published: 31 October 2017
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Abstract

This paper investigates glycerol and glycerides extraction process from fresh and waste sunflower oil biodiesel. Deep eutectic solvent choline-chloride: ethylene-glycol (molar ratio 1:2.5) was used as extraction media in both batch experiments and continuous Karr column. Biodiesel was synthesized in an alkali catalysed chemical transesterification reaction. Three process variables, namely hydrodynamic conditions, solvent to biodiesel ratio and extraction duration were investigated and their impact on the extraction efficiency was found to be largely negligible. Throughout the whole range of process variables the extraction efficiency was relatively high, getting slightly lower only during the continuous experiments. After the extraction, free glycerol content was below the limit for all samples, but the total glycerol and glycerides content was too high to fully comply with biodiesel quality standards. Selected extraction solvent has proved to be efficient for free glycerol removal in the tested range of conditions, but further process modifications and possible raw material and biodiesel processing will be needed to reduce the content of total glycerol and glycerides.

Published in Science Journal of Energy Engineering (Volume 5, Issue 4)
DOI 10.11648/j.sjee.20170504.12
Page(s) 87-94
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

Biodiesel, Deep Eutectic Solvents, Glycerol, Liquid-Liquid Extraction

References
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Cite This Article
  • APA Style

    Ana Petracic, Aleksandra Sander, Lana Magic. (2017). Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction. Science Journal of Energy Engineering, 5(4), 87-94. https://doi.org/10.11648/j.sjee.20170504.12

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    ACS Style

    Ana Petracic; Aleksandra Sander; Lana Magic. Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction. Sci. J. Energy Eng. 2017, 5(4), 87-94. doi: 10.11648/j.sjee.20170504.12

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    AMA Style

    Ana Petracic, Aleksandra Sander, Lana Magic. Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction. Sci J Energy Eng. 2017;5(4):87-94. doi: 10.11648/j.sjee.20170504.12

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  • @article{10.11648/j.sjee.20170504.12,
      author = {Ana Petracic and Aleksandra Sander and Lana Magic},
      title = {Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction},
      journal = {Science Journal of Energy Engineering},
      volume = {5},
      number = {4},
      pages = {87-94},
      doi = {10.11648/j.sjee.20170504.12},
      url = {https://doi.org/10.11648/j.sjee.20170504.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjee.20170504.12},
      abstract = {This paper investigates glycerol and glycerides extraction process from fresh and waste sunflower oil biodiesel. Deep eutectic solvent choline-chloride: ethylene-glycol (molar ratio 1:2.5) was used as extraction media in both batch experiments and continuous Karr column. Biodiesel was synthesized in an alkali catalysed chemical transesterification reaction. Three process variables, namely hydrodynamic conditions, solvent to biodiesel ratio and extraction duration were investigated and their impact on the extraction efficiency was found to be largely negligible. Throughout the whole range of process variables the extraction efficiency was relatively high, getting slightly lower only during the continuous experiments. After the extraction, free glycerol content was below the limit for all samples, but the total glycerol and glycerides content was too high to fully comply with biodiesel quality standards. Selected extraction solvent has proved to be efficient for free glycerol removal in the tested range of conditions, but further process modifications and possible raw material and biodiesel processing will be needed to reduce the content of total glycerol and glycerides.},
     year = {2017}
    }
    

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  • TY  - JOUR
    T1  - Separation of Free Glycerol and Glycerides from Biodiesel by Means of Liquid-Liquid Extraction
    AU  - Ana Petracic
    AU  - Aleksandra Sander
    AU  - Lana Magic
    Y1  - 2017/10/31
    PY  - 2017
    N1  - https://doi.org/10.11648/j.sjee.20170504.12
    DO  - 10.11648/j.sjee.20170504.12
    T2  - Science Journal of Energy Engineering
    JF  - Science Journal of Energy Engineering
    JO  - Science Journal of Energy Engineering
    SP  - 87
    EP  - 94
    PB  - Science Publishing Group
    SN  - 2376-8126
    UR  - https://doi.org/10.11648/j.sjee.20170504.12
    AB  - This paper investigates glycerol and glycerides extraction process from fresh and waste sunflower oil biodiesel. Deep eutectic solvent choline-chloride: ethylene-glycol (molar ratio 1:2.5) was used as extraction media in both batch experiments and continuous Karr column. Biodiesel was synthesized in an alkali catalysed chemical transesterification reaction. Three process variables, namely hydrodynamic conditions, solvent to biodiesel ratio and extraction duration were investigated and their impact on the extraction efficiency was found to be largely negligible. Throughout the whole range of process variables the extraction efficiency was relatively high, getting slightly lower only during the continuous experiments. After the extraction, free glycerol content was below the limit for all samples, but the total glycerol and glycerides content was too high to fully comply with biodiesel quality standards. Selected extraction solvent has proved to be efficient for free glycerol removal in the tested range of conditions, but further process modifications and possible raw material and biodiesel processing will be needed to reduce the content of total glycerol and glycerides.
    VL  - 5
    IS  - 4
    ER  - 

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Author Information
  • Department of Mechanical and Thermal Process Engineering, Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia

  • Department of Mechanical and Thermal Process Engineering, Faculty of Chemical Engineering and Technology, University of Zagreb, Zagreb, Croatia

  • INA-Industrija Nafte, d.d., Zagreb, Croatia

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