VACUUM FREEZE-DRYING OF A LIQUID IN A VIAL - DETERMINATION OF HEAT AND MASS-TRANSFER COEFFICIENTS AND OPTIMIZATION OF OPERATING PRESSURE

被引：17

作者：

RENE, F ^{[1
]}

WOLFF, E ^{[1
]}

RODOLPHE, F ^{[1
]}

机构：

[1] INRA, BIOMETRIE LAB, F-78350 JOUY EN JOSAS, FRANCE

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 1993年 / 32卷 / 04期

关键词：

D O I：

10.1016/0255-2701(93)80006-3

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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. The operating pressure is paramount since it causes dehydration speeds to vary by a factor of 1-2. Through the use of a simple model of the 'uniformly retreating ice front' type, it has been possible to identify the transfer parameters of the model. Correlations with the operating pressure have been established. The results show a working pressure optimum at 200 Pa.

引用

页码：245 / 251

页数：7

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