Gas permeation properties of Seragel membrane

Gas permeation behavior through a specific type of polymeric membrane was investigated in this work. The main objective of our study was to determine gas permeation properties of a specific polymeric membrane over a range of operating pressures. The diffusive layer of this membrane consists of Butadiene–Sulfone block copolymer and demonstrates high chemical stability in corrosive media. Permeances were determined at the temperature of 35 °C and pressures of 760, 1520, and 3040 cmHg for methane, carbon dioxide, and nitrogen. Gas permeances were also determined for actual binary mixtures of H2S/CH4. Average permeances of 23.17 and 3.75 GPU for H2S and CO2 were achieved respectively, at the pressure range of 380–1140 cmHg. Calculated permeances by a model developed for this membrane in previous literatures have been compared with experimental data in this study and the agreement of the model with H2S/CH4 mixture was also investigated. The results show that the agreement between the pure gas experimental permeances and the data from the model is more in comparison with the experimental gas mixture results. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.