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Study of shear rate influence on the performance of cellulose acetate reverse osmosis hollow fiber membranes

Idris, Ani and Noordin, M. Y. and Ismail, A. F. and Shilton, S. J. (2002) Study of shear rate influence on the performance of cellulose acetate reverse osmosis hollow fiber membranes. Journal of Membrane Sciene, 202 . pp. 205-215.

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Abstract

The effect of shear rate on the separation performance of reverse osmosis hollow fiber membrane is discussed. Experiments involving six different dope extrusion rates (DERs) (ranging 2.5–5 ml/min) are performed with the other process factors set at the optimum conditions determined by the Taguchi analysis. This will enable an assessment to be made on the relationship between the DER and the rejection rate. The regression method is used to analyse the experimental results and an empirical model has been developed. Simultaneously, it is found that there is a fairly strong correlation between extrusion shear rate and the rejection rate of the membranes, whereby as the shear rate increases, the rejection rate increases until a critical level of shear is achieved, beyond which reverse osmosis membrane performance deteriorates, suggesting that there exists an optimum shear rate which yields optimal membrane morphology for reverse osmosis hollow fiber membranes. © 2002 Elsevier Science B.V. All rights reserved.

Item Type:Article
Uncontrolled Keywords:Cellulose acetate, hollow fiber, regression, reverse osmosis, shear rate effect
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:760
Deposited By: Pn Norazana Ibrahim
Deposited On:11 Mar 2008 10:10
Last Modified:01 Jun 2010 02:47

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