A STUDY OF VACUUM FREEZE-DRYING OF FROZEN WET PAPERS

摘要

Vacuum freeze-drying of frozen wet papers was investigated experimentally.A freeze-drying facility was built to study the process by monitoring the variousphysical parameters (pressure, sample temperature, heater temperature, water contentof the sample and cold panel temperature). A simple phenomenological model wasdeveloped to explain experimental results. The values of the physical parameters wereoptimized to make the process cost effective.