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Article Dans Une Revue Drying Technology Année : 2016

Determination of PVC Powder Drying Kinetics at Particle Scale: Experimental Study and Modeling

Résumé

An original experimental method is used to determine drying kinetic at particle scale. The particle scale kinetics was obtained by immersion of a small mass of wet PVC particles (cake) in a batch dense fluidized bed containing inert hot particles (glass bead). The results are summarized here and prove clearly that the PVC drying is controlled by a competition between internal and external transfer. The drying kinetic was described by a particle scale model taking into account the convective-diffusive (mass transfer) and the convective-evaporative (heat transfer) phenomena. To validate this model with the experimental data, the experimental fluidized bed dryer is modeled following two different approaches: a perfect stirred reactor model and a 3D numerical simulation using the multiphase flow code NEPTUNE_CFD. The aim of this 3D simulation is to simulate the phenomena occurring, at local scale, in a dense fluidized bed dryer and to show the limitations of the perfect stirred reactor model.
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Dates et versions

hal-03516530 , version 1 (07-01-2022)

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Antoine Aubin, Renaud Ansart, Mehrdji Hemati, Thierry Lasuye, Marc Branly. Determination of PVC Powder Drying Kinetics at Particle Scale: Experimental Study and Modeling. Drying Technology, 2016, pp.1-72. ⟨10.1080/07373937.2016.1155596⟩. ⟨hal-03516530⟩
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