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Fig. 4 Mixed-gas permeation properties of AO-PIM (AO-PIM-1) membranes in a ternary mixture (20 mol % H2S, 20 mol % CO2, and 60 mol % CH4) at 35°C under feed pressures up to 77 bar: A comparison of the freshly made film before and after long-term continuous active feed of 20 mol % H2S/20 mol % CO2/60 mol % CH4 at feed pressure of 8.6 bar at 35°C. Mixed-gas permeation properties of AO-PIM (AO-PIM-1) membranes in a ternary mixture (20 mol % H2S, 20 mol % CO2, and 60 mol % CH4) at 35°C under feed pressures up to 77 bar: A comparison of the freshly made film before and after long-term continuous active feed of 20 mol % H2S/20 mol % CO2/60 mol % CH4 at feed pressure of 8.6 bar at 35°C. (A) H2S permeability as a function of total mixed-gas feed pressure. (B) Combined acid gas selectivity as a function of total mixed-gas feed pressure. (C) CO2/CH4 selectivity as a function of total mixed-gas feed pressure. (D) H2S/CH4 selectivity as a function of total mixed-gas feed pressure. Shouliang Yi et al. Sci Adv 2019;5:eaaw5459 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
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