Table 3.

Selectivity of PIM-1 membrane at 35 °C.

	This Work	Budd et al. [24]	Staiger et al. [5]	Thomas et al. [25]	Starannikova et al. [26]
CO2/CH4	5.8 ± 0.2	18.4	9.7	15.1	10.6
CO2/N2	21.8 ± 0.7	25.0	14.7	19.1	18.4
O2/N2	5.3 ± 0.3	4.0	3.3	3.8	2.9
He/N2	5.9 ± 0.4	7.2	4.5	4.4	2.1
He/CH4	1.6 ± 0.1	5.3	2.9	3.5	1.2