Melting Point Depression of Ionic Liquids with CO2: Phase Equilibria
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- 作者：Aaron M. Scurto ; Elizabeth Newton ; Ross R. Weikel ; Laura Draucker ; Jason Hallett ; Charles L. Liotta ; Walter Leitner ; Charles A. Eckert
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2008
- 出版时间：February 6, 2008
- 年：2008
- 卷：47
- 期：3
- 页码：493 - 501
- 全文大小：230K
- 年卷期：v.47,no.3(February 6, 2008)
- ISSN：1520-5045
文摘
Development of ionic liquids for specific tasks is currently being pursued by many researchers as numerouscation/anion combinations are theoretically possible. However, only a small fraction of these combinationsmelt below 100 
C. Recently, large melting point depressions of several ionic solids with compressed carbondioxide have been reported. This investigation details the melting point depression of a large number of ionicorganic compounds (ionic liquids) with gaseous, liquid, and supercritical CO2. Large and previously unreporteddepressions were observed for some of the ionic solids. This methodology greatly expands the numbers ofcompounds and functional groups that can be employed in an ionic liquid/compressed gas system for variousapplications. Thermodynamic analysis indicates that even small amounts of CO2 can lead to substantial meltingpoint depression, due to its very low melting temperature and negative deviations to Raoult's law.
C. Recently, large melting point depressions of several ionic solids with compressed carbondioxide have been reported. This investigation details the melting point depression of a large number of ionicorganic compounds (ionic liquids) with gaseous, liquid, and supercritical CO2. Large and previously unreporteddepressions were observed for some of the ionic solids. This methodology greatly expands the numbers ofcompounds and functional groups that can be employed in an ionic liquid/compressed gas system for variousapplications. Thermodynamic analysis indicates that even small amounts of CO2 can lead to substantial meltingpoint depression, due to its very low melting temperature and negative deviations to Raoult's law.