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Application of Torrefaction for Improved Fuel Properties of Sunflower Husks

Author

Listed:
  • Oleg Milovanov

    (National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia)

  • Dmitry Klimov

    (National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia)

  • Sergey Kuzmin

    (National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia)

  • Sergey Grigoriev

    (National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia)

  • Alexander Mikhalev

    (Clean Energy LLC, 392032 Tambov, Russia)

  • Rafail Isemin

    (Independent Researcher, 392000 Tambov, Russia)

  • Mathieu Brulé

    (Independent Researcher, 11100 Narbonne, France)

Abstract

Sunflower husk (SFH) contributes 45–60% of the total sunflower seed weight and is a by-product of the sunflower oil industry. Among other elements, SFH ash contains K, Na, Ca and Mg. These elements cause rapid growth of ash deposits on convective heating surfaces of the boiler, resulting in reduced efficiency. The aim of this paper is to examine the possibility of producing quality fuel from SFH by its pretreatment with the technique of torrefaction in a fluidized bed in superheated water vapor. Continuous monitoring of the innovative SFH torrefaction process allowed for the determination of optimal process durations. SFH could be converted into a biofuel, having high calorific value and suitable characteristics for co-combustion with coal. Furthermore, the torrefaction in a fluidized bed of superheated water vapor allowed for a 6-fold reduction in the required process duration in comparison with data reported from the literature for the process of torrefaction in a dense bed, along with a 3-fold reduction in the chlorine content in SFH ash. These effects are beneficial to resolve the problem of corrosion on convective heating surfaces of boilers. However, torrefaction in superheated water vapor did not significantly reduce the content of alkaline and alkaline-earth elements in SFH ash. Still, this issue may be alleviated by significantly increasing the duration of SFH pretreatment.

Suggested Citation

  • Oleg Milovanov & Dmitry Klimov & Sergey Kuzmin & Sergey Grigoriev & Alexander Mikhalev & Rafail Isemin & Mathieu Brulé, 2024. "Application of Torrefaction for Improved Fuel Properties of Sunflower Husks," Energies, MDPI, vol. 17(18), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:18:p:4643-:d:1479804
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    References listed on IDEAS

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    2. Tu, Ren & Sun, Yan & Wu, Yujian & Fan, Xudong & cheng, Shuchao & Jiang, Enchen & Xu, Xiwei, 2022. "The fuel properties and adsorption capacities of torrefied camellia shell obtained via different steam-torrefaction reactors," Energy, Elsevier, vol. 238(PC).
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    4. Li, Jun & Brzdekiewicz, Artur & Yang, Weihong & Blasiak, Wlodzimierz, 2012. "Co-firing based on biomass torrefaction in a pulverized coal boiler with aim of 100% fuel switching," Applied Energy, Elsevier, vol. 99(C), pages 344-354.
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