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Modelling of water adsorption - condensation isotherms on beds of nanoparticles

Abstract : In this paper, the multimolecular adsorption equation (so-called GAB equation) was modified by adding an amount of condensed water between the particles. This new model was then compared with experimental results obtained on three nanostructured powders of different nature: zinc, amorphous carbon and zinc-aluminium obtained from metallisation fumes. The influence of the particle diameter, the porosity of the sample andt he importance of the determination of the GAB constant for the new equation were all studied. We found that the new model corresponds well withe xperimental data on almost all the range of water activity and thus increases the range of the GAB equation. Finally, the new developed model only uses three fitted GAB parameters and does not require additional adjusting parameters.
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https://hal.archives-ouvertes.fr/hal-00990920
Contributor : Dominique Thomas <>
Submitted on : Wednesday, May 14, 2014 - 1:51:07 PM
Last modification on : Monday, March 23, 2020 - 2:16:34 PM

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Quentin Ribeyre, Georges Grévillot, Augustin Charvet, Cécile Vallières, Dominique Thomas. Modelling of water adsorption - condensation isotherms on beds of nanoparticles. Chemical Engineering Science, Elsevier, 2014, 113, pp.1-10. ⟨10.1016/j.ces.2014.03.027⟩. ⟨hal-00990920⟩

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