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

A. Idris, M.Y. Noordin, A.F. Ismail, S.J. Shilton

Research output: Contribution to journalArticle

19 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)205-215
Number of pages10
JournalJournal of Membrane Science
Volume202
DOIs
Publication statusPublished - 2002

Keywords

  • cellulose acetate
  • hollow fiber
  • shear rate effect
  • reverse osmosis
  • regression
  • chemical engineering

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