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Title: Experimental and numerical investigations on freeze-drying of porous media with prebuilt porosity
Authors: Wang, W
Yang, J
Hu, DP
Pan, YQ
Wang, SH
Chen, GH 
Keywords: Initial saturation
Drying time
Mass transfer
Issue Date: 2018
Publisher: North-Holland
Source: Chemical physics letters, 16 May 2018, v. 700, p. 80-87 How to cite?
Journal: Chemical physics letters 
Abstract: Freeze-drying of initially porous frozen material was investigated aimed at improving the process economics by reducing drying time and raising productivity. Experimental results showed that freeze-drying can be significantly enhanced by the frozen material with prebuilt porosity, and about 31% of drying time can be saved compared with the conventionally solid frozen material under the tested operating conditions. A multiphase transport model was formulated based on the local mass non-equilibrium assumption. Numerical results showed excellent agreements between measured and predicted drying curves. Analyses of saturation and temperature profiles displayed that volumetric sublimation-desorption can occur for the initially porous frozen material.
ISSN: 0009-2614
DOI: 10.1016/j.cplett.2018.04.008
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