Permeability functions for pure and mixture gases in silicone rubber and polysulfone membranes: Dependence on pressure and composition

doi:10.1016/S0376-7388(97)00150-6

Journal of Membrane Science

Volume 135, Issue 2, 26 November 1997, Pages 251-261

https://doi.org/10.1016/S0376-7388(97)00150-6 Get rights and content

Abstract

Permeability functions are developed for pure gases and mixtures of N₂, CH₄, CO₂, and O₂ as a function of driving pressure for polysulfone and silicone rubber membranes. The gas mixtures used in the measurements include N₂O₂, CO₂N₂O₂, and CH₄N₂CO₂. The functions are expressed in a linear form in terms of species partial pressures. The functions are in good agreement with the measured data. Positive and large weights for the fastest permeating species, CO₂, are obtained in the permeability functions for all species in polysulfone. The opposite is obtained for the slower permeating species in the polysulfone permeability functions. This result is consistent with the membrane behaviour, where permeability of faster species is reduced by presence of slower species. The species weights in the silicone rubber permeability functions are 1–5 orders of magnitudes smaller than the function constant. This behaviour is dictated by limited variations in species permeability in silicone rubber.

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Permeability functions for pure and mixture gases in silicone rubber and polysulfone membranes: Dependence on pressure and composition

Abstract

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

J. Membr. Sci.

Gas Sep. Purif.

Gas Sep. Purif.