Modeling of Vacuum Desorption in Freeze-Drying Process
- 1 August 2005
- journal article
- Published by Informa UK Limited in Drying Technology
- Vol. 23 (8), 1693-1709
- https://doi.org/10.1081/drt-200065117
Abstract
A mathematical model of multicomponent vacuum desorption, which occurs in vacuum freeze-drying process, was developed. In freeze-drying porous biomaterials and pharmaceuticals are considered and the vacuum freeze-drying process, especially the moisture desorption in its final stage, is investigated. In this article, the drying with conductive heating and constant contact surface temperature was considered. Pressure drop is taken into account in the model formulation but was neglected in process simulation because of thin material layers undergoing freeze-drying. Model equations were solved by numerical method of lines. Moisture content and temperature distributions within the drying material were predicted from the model as a function of drying time.Keywords
This publication has 13 references indexed in Scilit:
- Vacuum drying of a multicomponent pharmaceutical product having different pseudo-polymorphic formsChemical Engineering and Processing - Process Intensification, 1999
- Mathematical Modelling of the Primary and Secondary Drying Stages of Bulk Solution Freeze-Drying in Trays: Parameter Estimation and Model Discrimination by Comparison of Theoretical Results With Experimental DataDrying Technology, 1997
- Research and Development Needs and Opportunities in Freeze DryingDrying Technology, 1996
- Freeze-Drying of Pharmaceutical Crystalline and Amorphous Solutes in Vials: Dynamic Multi-Dimensional Models of the Primary and Secondary Drying Stages and Qualitative Features of the Moving InterfaceDrying Technology, 1995
- MODIFIED BET EQUATION FOR SORPTION/DESORPTION ISOTHERMSDrying Technology, 1990
- Vacuum freeze-drying kinetics and modelling of a liquid in a vialChemical Engineering and Processing - Process Intensification, 1989
- Study of the adsorption and desorption of multiple adsorbates in a fixed bedAIChE Journal, 1988
- EFFECT OF MASS CONVECTION ON VACUUM-SUBLIMATION IN AN INITIALLY PARTIALLY FILLED FROZEN POROUS MEDIUMDrying Technology, 1988
- Parametric analysis of thermal regeneration of adsorption bedsIndustrial & Engineering Chemistry Research, 1988
- Theory of chromatography. Part 10.—Formulæ for diffusion into spheres and their application to chromatographyTransactions of the Faraday Society, 1955