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Ideal Gas Solubilities and Solubility Selectivities in a Binary Mixture of Room-Temperature Ionic Liquids
Abstract
This study focuses on the solubility behaviors of CO2, CH4, and N2 gases in binary mixtures of imidazolium-based room-temperature ionic liquids (RTILs) using 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][Tf2N]) and 1-ethyl-3-methylimidazolium tetrafluoroborate ([C2mim][BF4]) at 40 degrees C and low pressures (approximately 1 atm). The mixtures tested were 0, 25, 50, 75, 90, 95, and 100 mol % [C2mim][BF4] in [C2mim][Tf2N]. Results show that regular solution theory (RST) can be used to describe the gas solubility and selectivity behaviors in RTIL mixtures using an average mixture solubility parameter or an average measured mixture molar volume. Interestingly, the solubility selectivity, defined as the ratio of gas mole fractions in the RTIL mixture, of CO2 with N2 or CH4 in pure [C2mim][BF4] can be enhanced by adding 5 mol % [C2mim][Tf2N].
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An overview of CO2 capture technologies
MacDowell, N., Florin, N., Buchard, A., Hallett, J., Galindo, A., Jackson, G., Adjiman, C. S., Williams, C. K., Shah, N., & Fennell, P. (2010) · Energy & Environmental Science · doi:10.1039/c004106h · Cited by 1,636
Room-Temperature Ionic Liquids and Composite Materials: Platform Technologies for CO2 Capture
Bara, J. E., Camper, D. E., Gin, D. L., & Noble, R. D. (2010) · Accounts of Chemical Research · doi:10.1021/ar9001747 · Cited by 623
Self-citationCarbon Dioxide Capture with Ionic Liquids and Deep Eutectic Solvents: A New Generation of Sorbents
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Metadata
- Authors
- Finotello, A., Bara, J. E., Narayan, S., Camper, D., & Noble, R. D.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-02-01
- Volume
- 112
- Issue
- 8
- Pages
- 2335-2339
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W1994205889
- Cited by
- 174
- References
- 0
- FWCI
- 4.72
- Type
- journal article
- Language
- en
- Open access
- closed
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- Finotello, A., Bara, J. E., Narayan, S., Camper, D., & Noble, R. D. (2008). Ideal Gas Solubilities and Solubility Selectivities in a Binary Mixture of Room-Temperature Ionic Liquids. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp075572l
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