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<p>This study focuses on the characterization of the combustion properties and hygroscopic behavior of charcoals from wood residues of tropical woods widely available in Cameroon, notably Azobé, Tali, Padouk and Iroko. The physicochemical and energetic properties were determined using the gravimetric and calorimetric methods, while the kinetics of water absorption by total immersion and drying at high temperatures (70, 80 and 90&#xa0;°C) were studied experimentally. The results show that charcoal from Azobé presents the best energy performance, characterized by a high basic density, a high fixed carbon content and a high higher heating value. Page model made it possible to effectively describe the kinetics of water absorption, while the logarithmic model proved to be the most suitable for modeling drying. Charcoal from Iroko appeared to be the most hygroscopic, with a high diffusion coefficient, indicating a high sensitivity to humidity. On the other hand, charcoal from Azobé and Tali have better hygrometric stability and rapid diffusion during desorption, thereby facilitating their drying. These results highlight the importance of diffusion and activation parameters for understanding water-charcoal interactions, with direct implications related to their storage and use of charcoal in humid tropical regions.</p>

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Combustion and kinetic properties of water absorption and high temperature drying of charcoal from wood residues of Azobé, Tali, Padouk and Iroko: experimental study and mathematical modeling

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Joseph Mfomo Zobo,
  • Maximilien Kouahou Djomou,
  • Armand Zebaze Ndongmo,
  • Godwin Fonyuy Banyuy,
  • Jean Jalin Eyinga Biwôlé,
  • Claude Takoumbe,
  • Jean Freddy Zam,
  • Scharife Brice Mukam,
  • Achille Bernard Biwolé

摘要

This study focuses on the characterization of the combustion properties and hygroscopic behavior of charcoals from wood residues of tropical woods widely available in Cameroon, notably Azobé, Tali, Padouk and Iroko. The physicochemical and energetic properties were determined using the gravimetric and calorimetric methods, while the kinetics of water absorption by total immersion and drying at high temperatures (70, 80 and 90 °C) were studied experimentally. The results show that charcoal from Azobé presents the best energy performance, characterized by a high basic density, a high fixed carbon content and a high higher heating value. Page model made it possible to effectively describe the kinetics of water absorption, while the logarithmic model proved to be the most suitable for modeling drying. Charcoal from Iroko appeared to be the most hygroscopic, with a high diffusion coefficient, indicating a high sensitivity to humidity. On the other hand, charcoal from Azobé and Tali have better hygrometric stability and rapid diffusion during desorption, thereby facilitating their drying. These results highlight the importance of diffusion and activation parameters for understanding water-charcoal interactions, with direct implications related to their storage and use of charcoal in humid tropical regions.