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Statistical physics studies of multilayer adsorption isotherm in food materials and pore size distribution

Author

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  • Aouaini, F.
  • Knani, S.
  • Ben Yahia, M.
  • Ben Lamine, A.

Abstract

Water sorption isotherms of foodstuffs are very important in different areas of food science engineering such as for design, modeling and optimization of many processes. The equilibrium moisture content is an important parameter in models used to predict changes in the moisture content of a product during storage. A formulation of multilayer model with two energy levels was based on statistical physics and theoretical considerations. Thanks to the grand canonical ensemble in statistical physics. Some physicochemical parameters related to the adsorption process were introduced in the analytical model expression. The data tabulated in literature of water adsorption at different temperatures on: chickpea seeds, lentil seeds, potato and on green peppers were described applying the most popular models applied in food science. We also extend the study to the newest proposed model. It is concluded that among studied models the proposed model seems to be the best for description of data in the whole range of relative humidity. By using our model, we were able to determine the thermodynamic functions. The measurement of desorption isotherms, in particular a gas over a solid porous, allows access to the distribution of pore size PSD.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:phsmap:v:432:y:2015:i:c:p:373-390
    DOI: 10.1016/j.physa.2015.03.052
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    References listed on IDEAS

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    1. 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.
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    Cited by:

    1. Md. Matiar Rahman & Abu Zar Shafiullah & Animesh Pal & Md. Amirul Islam & Israt Jahan & Bidyut Baran Saha, 2021. "Study on Optimum IUPAC Adsorption Isotherm Models Employing Sensitivity of Parameters for Rigorous Adsorption System Performance Evaluation," Energies, MDPI, vol. 14(22), pages 1-20, November.

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