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Separation of Rapeseed Oil Transesterification Reaction Product Obtained Under Supercritical Fluid Conditions Using Heterogeneous Catalysts

Author

Listed:
  • Yuri A. Shapovalov

    (Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan)

  • Sergei V. Mazanov

    (Mechanical Engineering Department, Kazan National Research Technological University, Kazan 420015, Russia)

  • Almaz U. Aetov

    (Mechanical Engineering Department, Kazan National Research Technological University, Kazan 420015, Russia)

  • Dyusek H. Kamysbaev

    (Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan)

  • Rustam R. Tokpayev

    (Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan)

  • Farid M. Gumerov

    (Mechanical Engineering Department, Kazan National Research Technological University, Kazan 420015, Russia)

Abstract

Rapeseed oil transesterification reaction with ethanol under supercritical fluid conditions was performed either in the presence of catalysts or without them. The catalysts were Al 2 O 3 and AlOOH, obtained after Al 2 O 3 hydrothermal processing, and CaO/Al 2 O 3 and CaO/AlOOH, obtained after permeation. The obtained product was measured for dynamic viscosity and density. Based on these data, kinematic viscosity was calculated. Biodiesel fuel was separated via centrifugation to extract more viscous ethyl esters of saturated fatty acids and unreacted triglycerides in order to comply with the standards for biodiesel fuel. Analyses have found that the maximum content of obtained ethyl esters of fatty acids in a reaction product before separation is reached, in the case of using the CaO/AlOOH catalyst, is in the amount of 93.34% by mass; and none of the samples’ kinematic viscosity values comply with the standards for biodiesel fuel. Performing centrifugation allowed us to reduce viscosity and increase biodiesel fuel concentration to reach the EN14214 standard requirements. Also, a significant deterioration of the initial catalysts’ strength after the singular experiment has been observed: Al 2 O 3 by 22.4%, AlOOH by 13.89%, CaO/Al 2 O 3 by 25.13%, and CaO/AlOOH by 17.27%.

Suggested Citation

  • Yuri A. Shapovalov & Sergei V. Mazanov & Almaz U. Aetov & Dyusek H. Kamysbaev & Rustam R. Tokpayev & Farid M. Gumerov, 2025. "Separation of Rapeseed Oil Transesterification Reaction Product Obtained Under Supercritical Fluid Conditions Using Heterogeneous Catalysts," Energies, MDPI, vol. 18(7), pages 1-18, March.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:7:p:1669-:d:1621632
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    References listed on IDEAS

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    1. Mohamed, Mohamed Mokhatr & Bayoumy, W.A. & El-Faramawy, Hossam & El-Dogdog, Wagdy & Mohamed, Ashraf A., 2020. "A novel α-Fe2O3/AlOOH(γ-Al2O3) nanocatalyst for efficient biodiesel production from waste oil: Kinetic and thermal studies," Renewable Energy, Elsevier, vol. 160(C), pages 450-464.
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    4. Outili, Nawel & Kerras, Halima & Nekkab, Chahra & Merouani, Rayane & Meniai, Abdesslam Hassen, 2020. "Biodiesel production optimization from waste cooking oil using green chemistry metrics," Renewable Energy, Elsevier, vol. 145(C), pages 2575-2586.
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