Multiphase behavior of supercritical fluid systems: oil solutions in light hydrocarbon solvents

1987 ◽  
Vol 26 (10) ◽  
pp. 2134-2139 ◽  
Author(s):  
Maciej Radosz
Keyword(s):  
Supercritical Fluid ◽  
Light Hydrocarbon ◽  
Hydrocarbon Solvents ◽  
Fluid Systems ◽  
Multiphase Behavior

Molecular thermodynamics of solute-polymer-supercritical fluid systems

AIChE Journal ◽  
1991 ◽  
Vol 37 (4) ◽  
pp. 607-616 ◽  
Author(s):  
Jae-Jin Shim ◽  
Keith P. Johnston
Keyword(s):  
Supercritical Fluid ◽  
Molecular Thermodynamics ◽  
Fluid Systems

Solvatochromic parameters and solubilities in supercritical fluid systems

1993 ◽  
Vol 71 (11) ◽  
pp. 1834-1840 ◽  
Author(s):  
Mark L. O'Neill ◽  
Peeter Kruus ◽  
Robert C. Burk
Keyword(s):  
Supercritical Fluid ◽  
Supercritical Fluids ◽  
Spectroscopic Studies ◽  
Solvatochromic Parameters ◽  
Solubility Prediction ◽  
Fluid Systems ◽  
Supercritical Fluid Solvents ◽  
Opposite Order ◽  
Solvent Systems ◽  
Solvent Power

Spectroscopic studies of the compound 2-nitroanisole in supercritical fluids CO2 and N2O show that π* values vary linearly with density. The solubility trends in these single component supercritical fluid solvents qualitatively followed the trends in solvent power predicted from π*. However, the relative solvent power predicted for CO2 and N2O based on π* resulted in an opposite order to what was determined experimentally through solubility measurements. The π* parameter may be of some use for solubility prediction if only a limited set of solute–solvent systems are considered. Measurements of π*, especially those in binary supercritical fluid solvents, suggest that π* could be a valuable tool for probing the solute-organized cybotactic region.

Predicting and Calculating Complex Phase Equilibrium in Supercritical Fluid Systems with a New Technique

1995 ◽  
Vol 60 (2) ◽  
pp. 188-210 ◽  
Author(s):  
Roumiana P. Stateva
Keyword(s):  
Phase Equilibrium ◽  
Equation Of State ◽  
Supercritical Fluid ◽  
New Technique ◽  
Complex Phase ◽  
Cubic Equation ◽  
Fluid Systems ◽  
Liquid Systems ◽  
A New Technique ◽  
Equilibrium Calculations

A general approach to multiphase equilibrium calculations with particular application to vapour-liquid-liquid and liquid-liquid-liquid systems is presented. The capabilities of the new technique to correctly predict and calculate complex phase equilibrium are tested on five highly non-ideal systems, relevant to supercritical fluid extraction. The thermodynamic models applied are the recently proposed MHV2 model and the Redlich-Kwong-Soave cubic equation of state.

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