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Modeling of adsorption isotherms of water vapor on Tunisian olive leaves using statistical mechanical formulation

Author

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  • Knani, S.
  • Aouaini, F.
  • Bahloul, N.
  • Khalfaoui, M.
  • Hachicha, M.A.
  • Ben Lamine, A.
  • Kechaou, N.

Abstract

Analytical expression for modeling water adsorption isotherms of food or agricultural products is developed using the statistical mechanics formalism. The model developed in this paper is further used to fit and interpret the isotherms of four varieties of Tunisian olive leaves called “Chemlali, Chemchali, Chetoui and Zarrazi”. The parameters involved in the model such as the number of adsorbed water molecules per site, n, the receptor sites density, NM, and the energetic parameters, a1 and a2, were determined by fitting the experimental adsorption isotherms at temperatures ranging from 303 to 323 K. We interpret the results of fitting. After that, the model is further applied to calculate thermodynamic functions which govern the adsorption mechanism such as entropy, the free enthalpy of Gibbs and the internal energy.

Suggested Citation

  • Knani, S. & Aouaini, F. & Bahloul, N. & Khalfaoui, M. & Hachicha, M.A. & Ben Lamine, A. & Kechaou, N., 2014. "Modeling of adsorption isotherms of water vapor on Tunisian olive leaves using statistical mechanical formulation," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 400(C), pages 57-70.
    • Handle: RePEc:eee:phsmap:v:400:y:2014:i:c:p:57-70
    DOI: 10.1016/j.physa.2014.01.006
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    Cited by:

    1. Aouaini, Fatma & Knani, Salah & Yahia, Manel Ben & Bahloul, Neila & Ben Lamine, Abdelmottaleb & Kechaou, Nabil, 2015. "Investigation of pore size and energy distributions by statistical physics formalism applied to agriculture products," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 439(C), pages 150-159.
    2. Aouaini, F. & Knani, S. & Ben Yahia, M. & Ben Lamine, A., 2015. "Statistical physics studies of multilayer adsorption isotherm in food materials and pore size distribution," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 432(C), pages 373-390.
    3. Bouzid, Mohamed & Sellaoui, Lotfi & Khalfaoui, Mohamed & Belmabrouk, Hafedh & Lamine, Abdelmottaleb Ben, 2016. "Adsorption of ethanol onto activated carbon: Modeling and consequent interpretations based on statistical physics treatment," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 444(C), pages 853-869.

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