Influence of Ionic Liquid Structure on Supported Ionic Liquid Membranes Effectiveness in Carbon Dioxide/Methane Separation

Table 5

Mechanical stability of supports.

Membrane	Ionic liquid	Maximum pressure difference obtained, kPa	Average pressure difference in 283 K, kPa	Average pressure difference in 288 K, kPa	Average pressure difference in 298 K, kPa
PES	[EMIM][Tf2N]	4.70	n/a	n/a	4.70 ± 0.30
	[EMIM][TfO]	5.21	n/a	n/a	5.10 ± 0.20
PVDF	[EMIM][Tf2N]	22.81	22.14 ± 1.05	21.57 ± 1.24	20.18 ± 1.53
	[EMIM][TfO]	21.82	21.10 ± 0.63	20.60 ± 0.43	20.15 ± 0.87
PA	[EMIM][Tf2N]	22.30	n/a	n/a	20.31 ± 1.21
	[EMIM][TfO]	13.42	n/a	n/a	11.20 ± 0.96
	[EMIM][Tf2N]	55.75	51.97 ± 3.48	47.68 ± 3.06	43.31 ± 4.77
PP	[EMIM][TfO]	59.53	53.68 ± 1.87	51.78 ± 3.39	49.43 ± 6.23
	[BMIM][Tf2N]	47.64	46.40 ± 1.02	45.08 ± 1.73	44.59 ± 2.89
	[BMIM][TfO]	51.78	50.65 ± 1.16	48.28 ± 1.48	47.07 ± 1.00