High pressure phase behavior of carbon dioxide in 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquids

Modeling ionic liquids and the solubility of gases in them: Recent advances and perspectives

“…In general, very good agreement in the whole range of temperatures and pressure was achieved, although the use of three binary parameters, temperature dependent, limits the predictive power of the procedure. Very recently, Carvalho et al [40,41] also used the PR equation with the Wong-Sandler mixing rules, using the UNIQUAC model to calculate the activity coefficients to describe Henry's constants of CO 2 with [C 2 mim][Tf 2 N] and with [C 5 mim][Tf 2 N], achieving good agreement with the measured data. In this case, the critical parameters were taken from the work of Valderrama and Robles [42], who proposed a group contribution method to estimate the critical properties of 50 different ionic liquids.…”

Modeling vapor liquid equilibrium of ionic liquids + gas binary systems at high pressure with cubic equations of state

“…The experimental data were taken from the literature Ren et al, 2010;Nwosu et al, 2009;Carvalho et al, 2009aCarvalho et al, , 2009bKroon et al, 2005;Liu et al, 2003;Ren and Scurto, 2009a;Shariati and Peters, 2003;Florusse et al, 2008) and the characteristics of these systems are shown in Table 2. The adjustable parameters, k ij and l ij , the %AARD and the range of experimental data utilized (expressed in pressure and liquid phase molar composition) are shown in Table 3 for all 17 binary systems analyzed here.…”

“…Phase equilibria in systems composed of ionic liquids + CO 2 were studied by several authors Ren et al, 2010;Nwosu et al, 2009;Carvalho et al, 2009aCarvalho et al, , 2009bKroon et al, 2005;Liu et al, 2003;Blanchard et al, 1999), but few of them have assessed the solubility in ionic liquids of other gases. The phase equilibria of different imidazolium ionic liquids with 1,1,1,2-tetrafluoroethane (R-134a) were studied by Scurto (2009a, 2009b); the authors emphasize the importance of understanding these systems for the separation of hydrofluorocarbon refrigerant gases and in other engineering applications.…”

Group contribution lattice fluid equation of state for CO2–ionic liquid systems: An experimental and modeling study

“…Figure 9 shows the Henry's constants of CO 2 in 23 ILs at 298.15 K. It can be seen that the predicted Henry's constants by GCLF EOS (MR1) exhibit the similar trend as the experimental values collected from references. 38,41,56,64,66,79,95,[107][108][109][110][111][112] In order to achieve a deep insight into structure-property relation, we measured the solubility of CO 2 Figure 9, for the ILs with the same anion [Tf 2 N] 2 , the difference of Henry's constants among imidazolium, pyrrolidinium, and pyridinium-based cations is not significant with n (the number of carbon atoms in the alkyl chain on cation of ILs) < 8. However, for the ILs with ammonium and phosphoniumbased cations and the same anion [Tf 2 N] 2 , the Henry's constants follow the order of [P 6,6,6,14 2 .…”