Facilitated transport of CO2 and SO2 through Supported Ionic Liquid Membranes (SILMs)

CO2 separation applying ionic liquid mixtures: the effect of mixing different anions on gas permeation through supported ionic liquid membranes

“…17,18 Consequently, several studies on the permeation properties of gases through SILM systems have explored the effect of the IL structure. Relating to the influence of the cation, a number of groups have investigated the gas permeation properties of different families of ILs (imidazolium, [19][20][21][22][23][24][25][26][27][28][29][30] phosphonium, 31,32 sulphonium, 32 pyridinium, 33 and ammonium 34 ) and improved results were obtained for imidazolium-based SILMs in terms of permeability and selectivity. Other studies, also focused on imidazolium ILs, explored different structural variations of the cation in order to enhance CO 2 solubility and selectivity.…”

Application of Ionic Liquids in Membrane Separation Processes

“…Jiang and co-workers studied the permeation of N 2 , CO 2 , CH 4 and SO 2 through SILMs prepared with 1-butyl-3-methylimidazolium-, 1-ethyl-3-methylimidazolium-, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-ethyl-3-methylimidazolium triflate, 1-butyl-3-methylimidazolium hexafluorophosphate and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and found out that in the case of SO 2 the permeability increased, while in the other cases no significant change was observed with the increase in trans membrane pressure (Jiang et al, 2009). The permeation of CO 2 and SO 2 through 1-butylimidazolim acetate and 1-methylimidazolium acetate was studied by Luis et al (Luis et al, 2009) and the permeation of CO 2 , CH 4 , H 2 S through 1-butyl-3-methylimidazolium tetrafluoroborate based SILM was studied by Park et al (Park et al, 2009). In 2009 Scovazzo published a gas solubility and diffusivity model and the permeabilities of SILMs prepared from several imidazolium-, ammonium-, phosphonium based and functionalized ionic liquids for N 2 , O 2 , CO 2 and CH 4 gases (Scovazzo, 2009).…”

Interactions between the Ionic Liquid and the ZrO2 Support in Supported Ionic Liquid Membranes for CO2 Separation

“…The relatively high ideal selectivity, i.e., α (CO 2 /N 2 ) = 25, for the [C 4 . This behaviour may be associated with the increase of CO2 solubility when the gas pressure is increased for the ILs [36][37][38][39][40][41][42][43], resulting in a higher affinity for CO2 than N2. When the pressure increased from 2 to 3 bar, the CO2/N2 ideal selectivity increased very slightly, which means that the solubility is close to the saturation of ILs by both gases.…”

“…It turns out that the permeation was quasi-constant with a pressure increase. This behaviour can be explained by the transport mechanism through the ionic liquid, which is described by solution-diffusion mass transport processes when the maximum driving force is directly related to the CO 2 solubility in the ionic liquid [32][33][34][35][36][37][38][39][40] …”