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Production of Super Selective Polysulfone Hollow Fiber Membranes for Gas Separation

Ismail, A. F. and Dunkin, I. R. and Gallivan, S. L. and Shilton, S. J. (1999) Production of Super Selective Polysulfone Hollow Fiber Membranes for Gas Separation. Polymer, 40 (23). pp. 6499-6506. ISSN 0032-3861

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Official URL: http://dx.doi.org/10.1016/S0032-3861(98)00862-3


Polysulfone gas separation hollow fiber membranes were manufactured using a dry/wet spinning process with forced convection in the dry gap. Hollow fibers were produced using two different bore coagulants: one pure water and one with reduced water activity. An optimized multi-component dope was used which proved to be a shear-thinning power-law fluid. For each bore system, membranes were spun at low and high dope extrusion rates (DERs) corresponding to shear rates of around 4000 s21 and 10 000 s21, respectively, at the outer spinneret wall. Plane polarized infrared spectroscopy was used to probe the membrane active layer. Pressure-normalized fluxes and selectivities were evaluated using pure carbon dioxide and methane. For the spinning conditions used here, the combination of reduced water activity in the bore and high DER produced highly selective membranes. Some selectivities reached about three times the recognized intrinsic value for the polymer.

Item Type:Article
Uncontrolled Keywords:Hollow fiber membranes; Gas separation; Super selectivity
Subjects:T Technology > TP Chemical technology
ID Code:721
Deposited By: Pn Norazana Ibrahim
Deposited On:22 Feb 2007 05:32
Last Modified:25 Oct 2010 09:57

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