Dehumidification of Air by the Composite Membrane Coated with Hydrophilic Polymer on Inorganic Substrate
A membrane permeable to water vapor was prepared and used for dehumidification of air. At a given feed flow rate, the permeation ratios were almost independent to relative humidities of feed stream; The permeation ratios were about 45%, 60%, and 25% at feed flow rate of 50, 70, and 90cc/min, respectively. Permeation ratio might also be enhanced with increasing feed flow rate. However, the permeation ratio (about 25%) at a feed flow rate of 90cc/min was much less than at 50cc/min (about 45%) and 70cc/min (about 60%). This phenomenon might be explained that a water film does form at surface of membrane because the amount of water vapor contained in feed stream of 90cc/min was much more than the permeate through the membrane.
Byungsei Jun, Hyungsun Kim, Chanwon Lee, Soo Wohn Lee
K. H. Song et al., "Dehumidification of Air by the Composite Membrane Coated with Hydrophilic Polymer on Inorganic Substrate", Materials Science Forum, Vol. 569, pp. 337-340, 2008