Ternary Phase Behavior of Ionic Liquid (IL)−Organic−CO2 Systems
| Autor: | and Aaron M. Scurto, Joan F. Brennecke, Sudhir N. V. K. Aki |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Aqueous solution
Supercritical carbon dioxide Chemistry General Chemical Engineering Analytical chemistry Ionic bonding General Chemistry Ternary phase Industrial and Manufacturing Engineering chemistry.chemical_compound Critical point (thermodynamics) Hexafluorophosphate Ionic liquid Organic chemistry Ternary operation |
| Zdroj: | Industrial & Engineering Chemistry Research. 45:5574-5585 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/ie0511783 |
| Popis: | Recently, we have shown that gaseous or supercritical carbon dioxide can be used to induce a liquid−liquid phase split for homogeneous mixtures that consists of methanol−1-butyl-3-methylimidazolium hexafluorophosphate and aqueous/ionic liquid mixtures. [Scurto et al., J. Am. Chem. Soc. 2002, 124, 10276; Chem. Commun. 2003, 572.] Here, the factors that control the vapor−liquid−liquid equilibrium in ionic liquid−organic−carbon dioxide ternary systems at 40 °C are discussed. The lower-critical endpoint pressure (LCEP) locus, i.e., the pressure at which the liquid−liquid phase split occurs, is strongly dependent on the choice of organic, the type of ionic liquid (IL), and the concentration of IL in the organic. On the other hand, the K-point pressure, i.e., the pressure at which one of the liquid phases becomes identical with the CO2-rich phase, is dependent on the choice of organic only and it was determined to be same as the binary mixture critical point for the given organic−CO2 system. The compositions of... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|