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Solubility of supercritical gases in organic liquids
- Source :
- The Journal of Supercritical Fluids. 51:115-122
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- Chrastil (1982) [6] demonstrated that the solubility of a substance in a supercritical fluid (SCF) can be correlated with the density of the pure supercritical gas. Therefore, Chrastil's equation permits calculation of the supercritical phase composition of binary SCF + substance mixture based on the knowledge of the supercritical gas density and avoiding the use of equation of state based models. In this work, it is demonstrated that the supercritical fluid density also defines the liquid phase composition of binary systems; a density-dependent relationship is presented to calculate the solubility of supercritical gases in organic liquids. The isothermal solubility of several gases commonly employed in supercritical processing, such as carbon dioxide, methane, and ethane, in different organic liquids, including alkanes, alkenes, alcohols, acids, ketones, esters, terpenes and aromatic compounds, was successfully correlated as a function solely of the pure supercritical fluid density. As an application, pressure vs. composition phase diagrams of binary SCF + substance mixtures were obtained circumventing the use of equation of state models.
- Subjects :
- Equation of state
Supercritical carbon dioxide
General Chemical Engineering
Supercritical fluid extraction
Thermodynamics
Condensed Matter Physics
Supercritical fluid
Isothermal process
chemistry.chemical_compound
chemistry
Carbon dioxide
Organic chemistry
Physics::Chemical Physics
Physical and Theoretical Chemistry
Solubility
Phase diagram
Subjects
Details
- ISSN :
- 08968446
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- The Journal of Supercritical Fluids
- Accession number :
- edsair.doi...........f05f2e9f92d86bb3416bbd215c57db10