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

Idris, A. 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 Science, 202. pp. 205-215. ISSN 0376-7388

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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.

Item type: Article
ID code: 3785
Keywords: cellulose acetate, hollow fiber, shear rate effect, reverse osmosis, regression, chemical engineering, Chemical technology, Chemical engineering
Subjects: Technology > Chemical technology
Technology > Chemical engineering
Department: Faculty of Engineering > Chemical and Process Engineering
Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 04 Jul 2007
    Last modified: 12 Mar 2012 10:40
    URI: http://strathprints.strath.ac.uk/id/eprint/3785

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