Journal
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
Volume 90, Issue 2, Pages 1855-1864Publisher
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765201820170221
Keywords
asymmetric membranes; CO2/CH4 permeability; Dual-mode model; polysulfone
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An asymmetric membrane of polysulfone (PSf) was synthesized by phase inversion method. Permeation experiments were carried out between 2 to 5 bar pressure, and at temperatures 20 to 45 degrees C. The denseselective layer of PSf membrane presents regular thickness (about 5 mu m), and was not possible to observe the formation of macrovoids in porous layer. The CO2 permeability through membrane was 18.8 Barrer at 35 degrees C and 2 bar pressure, and this relationship between the pressure and the CO2 permeability was described adequately by Dual-mode model. The absence of CH4 permeability at 2 and 3 bar pressure, qualifies the PSf membrane for gases separation with high selectivity in this range.
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