Premium
Analysis of data in reverse osmosis with porous cellulose acetate membranes used
Author(s) -
Kimura Shoji,
Sourirajan S.
Publication year - 1967
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690130319
Subject(s) - reverse osmosis , membrane , mass transfer , cellulose acetate , chemistry , mass transfer coefficient , thermal diffusivity , diffusion , chromatography , osmosis , forward osmosis , volumetric flow rate , analytical chemistry (journal) , chemical engineering , thermodynamics , biochemistry , physics , engineering
Reverse osmosis experimental data for some inorganic salts with the porous cellulose acetate membrane used were analyzed to obtain their diffusivity in the membrane. A parameter including the diffusivity was found constant for each film in the concentration range investigated for a particular solute at a particular pressure. This parameter was also independent of feed flow rate. The effect of operating pressure on the parameter was found to depend on the film shrinkage. Mass transfer coefficient between the membrane and the feed solution was also obtained by the analysis, and this value was independently checked by the diffusion current method. Coincidence of these coefficients shows that the ordinary mass transfer coefficient can be used in reverse osmosis with the appropriate driving force. These facts facilitate the prediction of solute separation and membrane throughput rate in reverse osmosis.