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

Table 1

Gas permeation values in 298 K described in literature.

Ionic liquid	Permeation, barrer
Carbon dioxide
[EMIM][TfO]	920 [24]; 1171 [21, 34]
[EMIM][Tf2N]	960; 1702 [21, 34]
[EMIM][BF4]	9699 [21, 34]
[BMIM][PF6]	500 [35]; 544 [34]
[BMIM][Tf2N]	1344 [34]
[BMIM][BF4]	200 [29]
[HMIM][Tf2N]	1136 [21]
Methane
[EMIM][TfO]	63 [34]
[EMIM][Tf2N]	94; 39 [34]
[EMIM][BF4]	44 [34]
[BMIM][PF6]	40 [35]; 41 [34]
[BMIM][BF4]	3 [29]
[HMIM][Tf2N]	134 [34]