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Anion Effects on Gas Solubility in Ionic Liquids
Abstract
This work presents the results of solubility measurements for a series of gases in 1-n-butyl-3-methyl imidazolium tetrafluoroborate and 1-n-butyl-3-methyl imidazolium bis(trifluoromethylsulfonyl) imide. The gases considered include benzene, carbon dioxide, nitrous oxide, ethylene, ethane, oxygen, and carbon monoxide. Carbon dioxide and oxygen solubilities are also reported in methyl-tributylammonium bis(trifluoromethylsulfonyl) imide, butyl-methyl pyrrolidinium bis(trifluoromethylsulfonyl) imide, and tri-isobutyl-methyl phosphonium p-toluenesulfonate. We report the associated Henry's constants and enthalpies and entropies of absorption. In general, benzene, followed by carbon dioxide and nitrous oxide, have the highest solubilities and strongest interactions with the ionic liquids, followed by ethylene and ethane. Oxygen had very low solubilities and weak interactions. Carbon monoxide had a solubility below the detection limit of our apparatus. Ionic liquids with the bis(trifluoromethylsulfonyl) imide anion had the largest affinity for CO(2), regardless of whether the cation was imidazolium, pyrrolidinium, or tetraalkylammonium. These results suggest that the nature of the anion has the most significant influence on the gas solubilities.
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Span, R., & Wagner, W. (1996) · Journal of Physical and Chemical Reference Data · doi:10.1063/1.555991 · Cited by 5,049
Cammarata, L., Kazarian, S. G., Salter, P. A., & Welton, T. (2001) · Physical Chemistry Chemical Physics · doi:10.1039/b106900d · Cited by 1,441
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Metadata
- Authors
- Anthony, J. L., Anderson, J. L., Maginn, E. J., & Brennecke, J. F.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-03-11
- Volume
- 109
- Issue
- 13
- Pages
- 6366-6374
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W1985087154
- Cited by
- 1,058
- References
- 2
- FWCI
- 15.12
- Type
- journal article
- Language
- en
- Open access
- closed
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