An overview of the role of capillary condensation in wet caking of powders - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Engineering Research and Design Année : 2016

An overview of the role of capillary condensation in wet caking of powders

(1) , (1) , , (2) , (1)
1
2

Résumé

This work deals with the role of capillary condensation phenomenon on the caking behavior of powders. A theoretical basis is established to provide a quantitative description of the behavior of powders subjected to humidification. This approach is based on the integration of water condensation and liquid bridge formation within binary contacts in regular or random packing of particles. The existence of a minimum and a maximum limiting filling angle is demonstrated based on thermodynamic limitations. The role of the particle mean size, the wetting contact angle, the interparticle gap and the coordination number on limiting filling angles as well as the amount of condensed water at various water activities (a(w)) is investigated. The results show that for smooth and non soluble particles, capillary condensation plays a significant role only for sub-micronic powders for which the presence of water in liquid state (then liquid bridges) is expected at low water activities, sensibly less than the saturation activity (a(w) = 1). (C) 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Fichier non déposé

Dates et versions

hal-03630496 , version 1 (05-04-2022)

Identifiants

Citer

Zahra Afrassiabian, Mikel Leturia, Mohamed Benali, Mohamed Guessasma, Khashayar Saleh. An overview of the role of capillary condensation in wet caking of powders. Chemical Engineering Research and Design, 2016, 110, pp.245-254. ⟨10.1016/j.cherd.2016.03.020⟩. ⟨hal-03630496⟩
3 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More