Abstract
Experimental values for the solubility of carbon dioxide and hydrogen in three room temperature ionic liquids based on the same anion—(bistrifluoromethylsulfonyl)imide [Ntf2]—and three different cations—1-butyl-3-methylimidazolium, [C4mim], 1-ethyl-3-methylimidazolium, [C2mim] and trimethyl-butylammonium, [N4111]—are reported between 283 and 343 K and close to atmospheric pressure. Carbon dioxide, with a mole-fraction solubility of the order of 10−2, is two orders of magnitude more soluble than hydrogen. The solubility of CO2 is very similar in the three ionic liquids although slightly lower in the presence of the [C2mim] cation. In the case of H2, noticeable differences were observed with larger mole fraction solubilities in the presence of [N4111] followed by [C4mim]. All of the mole-fraction solubilities decrease with increasing temperature. From the variation of Henry’s law constants with temperature, the thermodynamic functions of solvation were calculated. The precision of the experimental data, considered as the average absolute deviation of the Henry’s law constants from appropriate smoothing equations, is always better than ±1%.
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Cadena, C., Anthony, J.L., Shah, J.K., Morrow, T.I., Brennecke, J.F., Maginn, E.J.: Why is CO2 so soluble in imidazolium-based ionic liquids? J. Am. Chem. Soc. 126, 5300–5308 (2004)
Baltus, R.E., Culbertson, B.H., Dai, S., Luo, H., DePaoli, D.W.: Low-pressure solubility of carbon dioxide in room-temperature ionic liquids measured with a quartz crystal microbalance. J. Phys. Chem. B 108, 721–727 (2004)
Camper, D., Becker, C., Koval, C., Noble, R.: Low pressure hydrocarbon solubility in room temperature ionic liquids containing imidazolium rings interpreted using regular solution theory. Ind. Eng. Chem. Res. 44, 1928–1933 (2005)
Camper, D., Becker, C., Koval, C., Noble, R.: Diffusion and solubility measurements in room temperature ionic liquids. Ind. Eng. Chem. Res. 45, 445–450 (2006)
Dyson, P.J., Laurenczy, G., Ohlin, C.A., Vallance, J., Welton, T.: Determination of hydrogen concentration in ionic liquids and the effect (or lack of) on rates of hydrogenation. Chem. Commun. 2418–2419 (2003)
Kim, Y.S., Choi, W.Y., Jang, J.H., Yoo, K.-P., Lee, C.S.: Solubility measurement and prediction of carbon dioxide in ionic liquids. Fluid Phase Equilib. 228–229, 439–445 (2005)
Anthony, J.L., Anderson, J.L., Maginn, E.J., Brennecke, J.F.: Anion effects on gas solubility in ionic liquids. J. Phys. Chem. B 109, 6366–6374 (2005)
Morgan, D., Ferguson, L., Scovazzo, P.: Diffusivities of gases in room-temperature ionic liquids: Data and correlations obtained using a lag-time technique. Ind. Eng. Chem. Res. 44, 4815–4823 (2005)
Lee, B.-C., Outcalt, S.L.: Solubilities of gases in the ionic liquid 1-n-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide. J. Chem. Eng. Data 51, 892–897 (2006)
Husson-Borg, P., Majer, V., Costa Gomes, M.F.: Solubilities of oxygen and carbon dioxide in butyl methyl imidazolium tetrafluoroborate as a function of temperature and at pressures close to atmospheric pressure. J. Chem. Eng. Data 48, 480–485 (2003)
Costa Gomes, M.F., Husson, P., Jacquemin, J., Majer, V.: Interactions of gases with ionic liquids: experimental approach. In: Rogers, R.D., Seddon, K.R. (eds.) ACS Symp. Series Ionic Liquids III: Fundamentals, Progress, Challenges, and Opportunities, Chap. 16, pp. 207–218. American Chemical Society, Washington (2005)
Jacquemin, J., Costa Gomes, M.F., Husson, P., Majer, V.: Solubility of carbon dioxide, methane, methane, oxygen, nitrogen, hydrogen, argon, and carbon monoxide in 1-butyl-3-methylimidazolium tetrafluoroborate between temperatures 283 K and 343 K and at pressures close to atmospheric. J. Chem. Thermodyn. 38, 490–502 (2006)
Jacquemin, J., Costa Gomes, M.F., Husson, P., Majer, V.: Low-pressure solubilities and thermodynamics of solvation of eight gases in 1-butyl-3-methylimidazolium hexafluorophosphate. Fluid Phase Equilib. 240, 87–95 (2006)
IUPAC Commission on Atomic Weights and Isotopic Abundances: Atomic weights of the elements 1985. Pure Appl. Chem. 58, 1677–1692 (1986)
Dymond, J.H., Smith, E.B.: The Virial Coefficients of Pure Gases and Mixtures. Clarendon, Oxford (1980)
Jacquemin, J., Husson, P., Padua, A.A.H., Majer, V.: Density and viscosity of several pure and water-saturated ionic liquids. Green Chem. 8, 172–180 (2006)
Hildebrand, J.H., Prausnitz, J.M., Scott, R.L.: Regular and Related Solutions. Reinhold, New York (1970), pp. 111–141
Costa Gomes, M.F.: Low-pressure solubility and thermodynamics of solvation of carbon dioxide, ethane, and hydrogen in 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide between temperatures of 283 and 343 K.. J. Chem. Eng. Data 52, 472–475 (2007)
Deschamps, J., Costa Gomes, M.F., Padua, A.A.H.: Molecular simulation study of interactions of carbon dioxide and water with ionic liquids. Chem. Phys. Chem. 5, 1049–1052 (2004)
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Jacquemin, J., Husson, P., Majer, V. et al. Influence of the Cation on the Solubility of CO2 and H2 in Ionic Liquids Based on the Bis(trifluoromethylsulfonyl)imide Anion. J Solution Chem 36, 967–979 (2007). https://doi.org/10.1007/s10953-007-9159-9
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DOI: https://doi.org/10.1007/s10953-007-9159-9