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THERMODYNAMIC MODELING FOR SUPERCRITICAL-FLUID PROCESS DESIGN

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Field Value
 
Title THERMODYNAMIC MODELING FOR SUPERCRITICAL-FLUID PROCESS DESIGN
 
Creator MUKHOPADHYAY, M
RAO, GVR
 
Subject carbon-dioxide
solubilities
mixtures
selectivities
solids
state
 
Description The present paper describes a predictive model for ascertaining the process parameters toward establishing an economically viable supercritical fluid technology. The model utilizes the Peng-Robinson equation of state with a modified covolume-dependent (CVD) mixing rule to be able to predict the solubility of mixed solids in pure and mixed supercritical carbon dioxide from minimum information, such as the pure component solubilities. The model can predict the solubility data at various temperatures by virture of its temperature-insensitive CVD interaction parameter. In order to make the model completely predictive, the CVD interaction parameter has been correlated in terms of the easily available pure component properties, such as solid molar volume, van der Waals volumes, and dipole moments. For mixed solvent, however, a more rigorous correlation is needed to account for stronger solute-cosolvent interactions. The validity of the model has also been tested for the solubility predictions of liquid solutes in the supercritical solvent. Slightly higher deviations of the liquid-phase compositions indicate that the mixing rule is rather well suited for the dilute supercritical solution. The utility of the model has been demonstrated for separation of palmitic acid from tripalmitin. The process parameters have been established under the equilibrium condition utilizing the well-predicted crossover pressures and solubility behavior with temperature.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-15T02:43:54Z
2011-12-26T12:49:11Z
2011-12-27T05:34:59Z
2011-07-15T02:43:54Z
2011-12-26T12:49:11Z
2011-12-27T05:34:59Z
1993
 
Type Article
 
Identifier INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 32(5), 922-930
0888-5885
http://dx.doi.org/10.1021/ie00017a021
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4132
http://hdl.handle.net/10054/4132
 
Language en