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Vacuum freeze-drying of a liquid in a vial: determination of heat and mass-transfer coefficients and optimization of operating pressure.

Author(s) : RENE F., WOLFF E., RODOLPHE F.

Type of article: Article

Summary

The kinetics of freeze-drying and temperature changes in the product core have been established for milk and water frozen in vials. The influence of heating plate temperature, working pressure and initial water content on the sublimation kinetics have been studied. Through the use of a simple model of the "uniformity retreating ice front" type, it has been possible to identify the transfer parameters of the model. Correlations with the operating pressure have been established.

Details

  • Original title: Vacuum freeze-drying of a liquid in a vial: determination of heat and mass-transfer coefficients and optimization of operating pressure.
  • Record ID : 1994-3223
  • Languages: English
  • Source: Chem. Eng. Process. - vol. 32 - n. 4
  • Publication date: 1993

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