Abstract
Drying of porous material containing a low boiling point solvent in high humidity air was investigated. Glass beads (mean diameter 50μm) packed beds which contained ethanol or water were used as model material. Mass and surface temperature of the material was measured during drying. In case of material containing ethanol, determinable mass increase was not measured even when the material temperature was lower than the steam dew point temperature of drying media at the early stage. The reason is that the ethanol evaporation from the material occurred simultaneously with steam condensation from the drying media onto the material surface.
