Experimental and numerical investigations on freeze-drying of porous media with prebuilt porosity

Wei Wang, Jing Yang, Dapeng Hu, Yanqiu Pan, Shihao Wang, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)80-87
Number of pages8
JournalChemical Physics Letters
Volume700
DOIs
Publication statusPublished - 16 May 2018

Keywords

  • Adsorption
  • Drying time
  • Initial saturation
  • Mass transfer
  • Sublimation-desorption

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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