Polymer (wt. % in NMP) Filler (wt. %) Pressure (bar) Permeability (Barrera) Ideal selectivity
CO2 (S. D.b) CH4 (S. D.b)
Matrimid 5218 (10) - 7.5 4.60 (0.45) 0.16 (0.04) 29
    10 4.45 (0.42) 0.12 (0.03) 37
Matrimid 5218 (10) Zeolite 4A (15) 7.5 4.66 (0.20) 0.13 (0.04) 36
    10 5.98 (0.60) 0.14 (0.03) 43
Matrimid 5218 (10) ZSM-5 (5) 7.5 4.43 (0.41) 0.15 (0.09) 30
    10 4.28 (0.29) 0.17 (0.05) 25
Matrimid 5218 (10) ZSM-5 (15) 7.5 4.24 (0.59) 0.15 (0.04) 28
    10 4.87 (0.48) 0.17 (0.6) 29
Matrimid 5218 (10) CMS (10) 7.5 4.99 (0.51) 0.11 (0.04) 45
    10 4.76 (0.46) 0.10 (0.03) 48
P84 (10)   7.5 0.92 (0.18) 0.13 (0.03) 7
    10 0.83 (0.16) 0.12 (0.03) 7
P84 (10) ZSM-5 (5) 7.5 0.92 (0.22) 0.12 (0.06) 8
    10 0.83 (0.11) 0.14 (0.03) 6
P84 (10) CNT (10) 7.5 1.05 (0.38) 0.12 (0.04) 9
    10 1.09 (0.20) 0.10 (0.04) 11
a1 Barrer = 10-11 cm3.cm/cm2.s.mmHg
bS. D.: Standard Deviation
Table 2: CO2 and CH4 permeation rates through the prepared pristine and MM membranes 30°C.