High pressure phase behaviour of carbon dioxide and two ionic liquids based on a benzyl functionalized cation
- Authors
- Kim, Minsu; Lee, Jinmyung; Lee, Saem; Park, YoonKook
- Issue Date
- Jun-2018
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- Carbon dioxide; Phase equilibrium; 1-benzyl-3-methylimidazolium; 1-benzylpyridinium; VLE
- Citation
- JOURNAL OF CHEMICAL THERMODYNAMICS, v.121, pp.91 - 96
- Journal Title
- JOURNAL OF CHEMICAL THERMODYNAMICS
- Volume
- 121
- Start Page
- 91
- End Page
- 96
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/3610
- DOI
- 10.1016/j.jct.2018.02.015
- ISSN
- 0021-9614
- Abstract
- The high pressure phase behaviour of a CO2 and 1-benzyl-3-methylimidazolium bis(trifluoromethylsulfo nyl) imide, [BzMeIM][NTf2], binary system was experimentally measured at high pressure up to about 13.5 MPa and at a temperatures range of 293.2-323.2 K. The solubilities were determined by measuring the bubble point pressure of the binary mixture comprising CO2 and an ionic liquid using a phase equilibrium apparatus including a high pressure variable-view cell. The effect of a benzyl functional group in different cations, imidazolium and pyridinium, on the high pressure phase behaviour of the CO2 and 1-benzylpyridinium bis(trifluoromethylsulfonyl) imide, [BzPY][NTf2], binary system was also investigated within similar temperature and CO2 mole fractions ranges. The experimental data correlated well with the Peng-Robinson equation of state. In general, higher CO2 solubilities were obtained in [BzPY][NTf2] than those in [BzMeIM][NTf2] at similar temperature and pressure. This may be attributed to the difference in aromaticity in pyridinium and imidazolium cations. (C) 2018 Elsevier Ltd.
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