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Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass

Author

Listed:
  • Hamza Chater

    (ERTE, ENSAM, Mohammed V University in Rabat, B.P. 6207, Avenue des FAR, Rabat 10100, Morocco)

  • Mohamed Asbik

    (ERTE, ENSAM, Mohammed V University in Rabat, B.P. 6207, Avenue des FAR, Rabat 10100, Morocco)

  • Abdelghani Koukouch

    (Green Energy Park (IRESEN, UM6P), km 2, Route Régionale R206, Benguerir 43150, Morocco)

  • Ammar Mouaky

    (Green Energy Park (IRESEN, UM6P), km 2, Route Régionale R206, Benguerir 43150, Morocco)

  • Stéphane Bostyn

    (ICARE, CNRS–1C Avenue de la Recherche Scientifique, CEDEX 2, 45071 Orléans, France)

  • Brahim Sarh

    (ICARE, CNRS–1C Avenue de la Recherche Scientifique, CEDEX 2, 45071 Orléans, France)

  • Fouzi Tabet

    (Opti’Tech, Schletterstrasse 12, 04107 Leipzig, Germany)

Abstract

This work analyzes the heat transfer and fluid flow within a batch reactor for hydrothermal carbonization (HTC) of raw olive pomace (ROP). The autoclave is partially filled with a mixture of ROP and distilled water and hence it is considered as a dispersed medium. The reactor is heated through its lateral surface, whereas the bottom wall and the upper surface of the mixture are thermally insulated. Under the effect of heat and pressure, the fluid moves inside the reactor, while particles are subject to other forces. Additionally, the biomass (ROP) is decomposed into very fine particles to produce a solid product (hydrochar). COMSOL Multiphysics software is used for the analysis of heat transfer and fluid dynamics. Chemical kinetics of the reactions are modeled by a basic kinetics model. Numerical results are validated using experimental data carried out in similar operating conditions. They are in good agreement since the deviation between them does not exceed 6%. Isotherms, velocity fields, and isobars are evaluated within the reactor as well as velocity and distribution of particles. These amounts are influenced by the imposed heat flux at the lateral wall ( q 0 ). Also, it has been shown that the temperature and pressure values reached are above those required by the HTC process and, consequently, a HTC reactor could be designed with optimal operating conditions.

Suggested Citation

  • Hamza Chater & Mohamed Asbik & Abdelghani Koukouch & Ammar Mouaky & Stéphane Bostyn & Brahim Sarh & Fouzi Tabet, 2022. "Analysis of Fluid Flow and Heat Transfer inside a Batch Reactor for Hydrothermal Carbonization Process of a Biomass," Energies, MDPI, vol. 15(3), pages 1-18, January.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:818-:d:731593
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    References listed on IDEAS

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    1. Gao, Pin & Zhou, Yiyuan & Meng, Fang & Zhang, Yihui & Liu, Zhenhong & Zhang, Wenqi & Xue, Gang, 2016. "Preparation and characterization of hydrochar from waste eucalyptus bark by hydrothermal carbonization," Energy, Elsevier, vol. 97(C), pages 238-245.
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    Cited by:

    1. Chater, Hamza & Asbik, Mohamed & Mouaky, Ammar & Koukouch, Abdelghani & Belandria, Veronica & Sarh, Brahim, 2023. "Experimental and CFD investigation of a helical coil heat exchanger coupled with a parabolic trough solar collector for heating a batch reactor: An exergy approach," Renewable Energy, Elsevier, vol. 202(C), pages 1507-1519.
    2. Chater, Hamza & Bakhattar, Ilias & Asbik, Mohamed & Koukouch, Abdelghani & Mouaky, Ammar & Ouachakradi, Zakariae, 2024. "Hybrid solar hydrothermal carbonization by integrating photovoltaic and parabolic trough technologies: Energy and exergy analyses, innovative designs, and mathematical Modelling," Energy, Elsevier, vol. 305(C).
    3. Chater, Hamza & Asbik, Mohamed, 2024. "Innovative mathematical approach for hydrothermal carbonization process using an inverse method: Experimental analysis, rheology behavior, and numerical comparative investigation," Energy, Elsevier, vol. 290(C).
    4. Mitchell Ubene & Mohammad Heidari & Animesh Dutta, 2022. "Computational Modeling Approaches of Hydrothermal Carbonization: A Critical Review," Energies, MDPI, vol. 15(6), pages 1-28, March.

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