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| Sample | Mixed gas selectivity (CO2/CH4) | Ideal selectivity (CO2/CH4) | Pure gas CO2 permeance, (l/m2 atm h) | Pure gas CH4 permeance, (l/m2 atm h) | Mixed gas permeance CO2, (l/m2 atm h) | Mixed gas permeance CH4, (l/m2 atm h) |
|---|---|---|---|---|---|---|
| C-40-F | 7.9 ± 0.4 | 8.1 ± 0.5 | 980 ± 49 | 120 ± 6 | 950 ± 40 | 120 ± 5 |
| C-40-1 | 20.8 ± 1.1 | 16.2 ± 0.7 | 292 ± 15 | 18 ± 0.9 | 274 ± 10 | 13.0 ± 0.5 |
%CO2/90 vol. %CH4.
