The Cation Effect on the Free Volume and the Solubility of H<sub>2</sub>S and CO<sub>2</sub> in Ionic Liquids Based on Bis(2-Ethylhexyl) Sulfosuccinate Anion
Tatyana S. Sazanova,
Alsu I. Akhmetshina,
Anton N. Petukhov,
Andrey V. Vorotyntsev,
Sergey S. Suvorov,
Alexandra V. Barysheva,
Amal Mechergui,
Alexander V. Nyuchev,
Olga V. Kazarina,
Anna N. Stepakova,
Maria E. Atlaskina,
Artem A. Atlaskin,
Sergey S. Kryuchkov,
Ilya V. Vorotyntsev
Affiliations
Tatyana S. Sazanova
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Alsu I. Akhmetshina
Department of Technologies for the Processing of Polymers and Composite Materials, Kazan National Research Technological University, 68 Karl Marx Str., 420015 Kazan, Russia
Anton N. Petukhov
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Andrey V. Vorotyntsev
Chemical Engineering Laboratory, Research Institute for Chemistry, N.I. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russia
Sergey S. Suvorov
Chemical Engineering Laboratory, Research Institute for Chemistry, N.I. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russia
Alexandra V. Barysheva
Chemical Engineering Laboratory, Research Institute for Chemistry, N.I. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russia
Amal Mechergui
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Alexander V. Nyuchev
Chemical Engineering Laboratory, Research Institute for Chemistry, N.I. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russia
Olga V. Kazarina
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Anna N. Stepakova
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Maria E. Atlaskina
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Artem A. Atlaskin
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Sergey S. Kryuchkov
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Ilya V. Vorotyntsev
Laboratory of SMART Polymeric Materials and Technologies, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., 125047 Moscow, Russia
Herein, we report for the first time a study dedicated to acidic gases’ solubility in ionic liquids with sterically hindered bulky anion, namely bis(2-ethylhexyl) sulfosuccinate ([doc]), experimentally evaluated at low pressures. The effect of cation change (imidazolium, pyridinium, and pyrrolidinium) on the thermophysical properties and sorption capacities was also discussed. The densities and the activation energies of the tested ILs exhibited minor differences. Furthermore, the COSMO-RS model was used to predict the free volumes of ILs aiming to investigate its influence on gas solubilities. The conducted calculations have revealed an antibate correlation between the fractional free volume (FFV) and Henry’s law constant. In particular, the lowest FFV in 1-methylimidazolium [doc] corresponded to the minimal sorption and vice versa. In addition, it was shown that the presence of protic cation results in a significant reduction in CO2 and H2S solubilities. In general, the solubility measurement results of the synthesized ILs have shown their superiority compared to fluorinated ILs based on the physical absorption mechanism.
