Table 2.

Selectivity of SPEKEBI-x-SiO₂ and SPEKEBI membranes.

Membranes	б (mS cm−1)		PMeOH	Selectivity
	30 °C	80 °C	(×10−7 cm2 s−1)	(×10−4 S s cm−3)
SPEKEBI	136	233	8.62	15.8
SPEKEBI-2.5-SiO2	131	204	7.91	16.6
SPEKEBI-5.0-SiO2	118	231	6.54	18.0
SPEKEBI-7.5-SiO2	129	244	5.81	22.2
SPEKEBI-10-SiO2	83	153	4.22	19.7