Premium
Optimization of NS‐100 membrane for reverse osmosis
Author(s) -
Fang Herbert H. P.,
Chian Edward S. K.
Publication year - 1976
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1976.070200202
Subject(s) - membrane , reverse osmosis , casting , permeation , materials science , fabrication , flux (metallurgy) , salt (chemistry) , chromatography , osmotic pressure , forward osmosis , chemical engineering , chemistry , composite material , engineering , metallurgy , biochemistry , organic chemistry , medicine , alternative medicine , pathology
The optimization of a newly developed reverse osmosis membrane, NS‐100, was studied based upon two series of statistically designed experiments. A total number of 33 experiments was run to evaluate the effects and interaction effects of five independent casting variables. With the aid of a constrained optimization method, SUMT algorithm, the optimum conditions for all casting variables were determined. Flat‐sheet membranes cast under these conditions yielded a permeate flux of 10.30 ± 1.95 gal/ft 2 ‐day (gfd) and a 99.30 ± 0.18% rejection of salt under a pressure of 600 ib/in. 2 (psig). Tubular membranes, on the other hand, yielded a flux of 10.13 ± 3.19 gfd and a 98.51 ± 0.66% rejection of salt. These performances evidently indicate that the optimized NS‐100 membrane is superior to those previously developed. The satisfactory performance of tubular membranes indicates the feasibility of applying the results found in this study for the fabrication of tubular modules.