Measurement and prediction of phase behaviour for 1-alkyl-3-methylimidazolium tetrafluoroborate and carbon dioxide: Effect of alkyl chain length in imidazolium cation
- Authors
- Hwang, SeYeon; Park, YoonKook; Park, Kyungmoon
- Issue Date
- Mar-2011
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- Carbon dioxide; Phase equilibrium; 1-Alkyl-3-methylimidazolium; tetrafluoroborate; VLE; VLLE
- Citation
- JOURNAL OF CHEMICAL THERMODYNAMICS, v.43, no.3, pp.339 - 343
- Journal Title
- JOURNAL OF CHEMICAL THERMODYNAMICS
- Volume
- 43
- Number
- 3
- Start Page
- 339
- End Page
- 343
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19922
- DOI
- 10.1016/j.jct.2010.10.005
- ISSN
- 0021-9614
- Abstract
- The high-pressure phase behaviour of the binary system {1-ethyl-methylimidazolium tetrafluoroborate ([EMIM][BF4]) + CO2} was determined over the temperature range of (293.2 to 323.2) K at intervals of 5.0 K with the CO2 mole fraction ranging from 0.153 to 0.578 by using a high-pressure variable-volume view cell. Further, the (vapour + liquid) equilibrium of the binary system {1-hexyl-methylimidazolium tetrafluoroborate a ([HMIM][BF4]) + CO2} was measured over the temperature range of (303.2 to 328.2) K with the CO2 mole fraction ranging from 0.314 to 0.593. The Peng-Robinson equation of state along with two-parameter mixing rules has been employed to correlate the experimental results. In case of the ([EMIM][BF4] + CO2) system, the (vapour + liquid + liquid) equilibrium and (vapour + liquid) equilibrium have been observed at a high CO2 mole fraction. The experimental values obtained in this study were compared with the available phase behaviour data of the binary system (1-alkyl-3-methylimidazolium tetrafluoroborate + CO2) in order to investigate the effect of the alkyl chain length in the imidazolium cation on the phase behaviour of such systems. (C) 2010 Elsevier Ltd. All rights reserved.
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