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Effects of dope extrusion rate on the morphology and gas separation performance of asymmetric polysulfone hollow fiber membranes for 024 separation

Ismail, Ahmad Fauzi and Mohd. Ibrahim, Suhaina and Nasri, Nor Shawal (2002) Effects of dope extrusion rate on the morphology and gas separation performance of asymmetric polysulfone hollow fiber membranes for 024 separation. Songklanakarin Journal of Science and Technology, 24 (Suppl). pp. 833-842. ISSN 0125-3395

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Abstract

The objective of this study was to investigate the influence of dope extrusion rates on morphology and gas separation performance of asymmetric polysulfone hollow fiber membranes. Asymmetric poly- Sulfone hollow fiber membranes for gas separation were prepared from a solution consisting of 26.0 wt . % ofpolysulfone, 30.4 wt. % of N, N-dhnethylacetamide, 30.4 wt. % of tetrahydrofuran and 13.2 wt. % ethanol. The dry/wet phase separation process was applied to a drylwet spinning process. Fibers were spun at various dope extrusion rates (DER) ranging from 1.5 - 3.0 cm3/min and hence at different levels of shear. The results Suggest that as the dope extrusion rate is increased, the selectivity will increase until a critical level of shear is reached, beyond which the membrane performance deteriorates. Pressure-normalized-fluxes and selectivities were evaluated by using pure oxygen and nitrogen as test gases.

Item Type:Article
Uncontrolled Keywords:gas separation; polysulfone; shear rates; hollow fiber membranes
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:910
Deposited By: Pn Norazana Ibrahim
Deposited On:22 Feb 2007 10:24
Last Modified:25 Oct 2010 08:14

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