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  4. Phase equilibria of carbon dioxide + poly ethylene glycol + water mixtures at high pressure: Measurements and modelling
 
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2009
Journal Article
Title

Phase equilibria of carbon dioxide + poly ethylene glycol + water mixtures at high pressure: Measurements and modelling

Abstract
Phase equilibria of carbon dioxide + poly ethylene glycol (PEG) of average mol weight 6000 g/mol + water mixtures has been measured by the static method at conditions of interest for the development of Particles from Gas Saturated Solutions (PGSS)-drying processes (pressure from 10 MPa to 30 MPa, temperature from 353 K to 393 K). A thermodynamic model based on the Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) equation of state has been developed for correlating experimental data. The model is able to predict the composition of the liquid phase with an average deviation of 8.0%. However, the model does not calculate correctly the concentration of PEG in the gas phase. The model is also capable of predicting VLE data reported in the literature of PEG + CO2 mixtures with PEGs of molecular weights ranging from 1500 g/mol to 18500 g/mol as well as solid-fluid equilibrium of carbon dioxide + PEG mixtures at pressures below 10 MPa.
Author(s)
Martín, Á.
Ruhr-Univ. Bochum, VTP
Pham, H.M.
Ruhr-Univ. Bochum, VTP
Kilzer, Andreas  
Ruhr-Universität Bochum, VTP
Kareth, S.
Ruhr-Universität Bochum, VTP
Weidner, Eckhard  
Ruhr-Universität Bochum, VTP
Journal
Fluid phase equilibria  
DOI
10.1016/j.fluid.2009.08.010
Language
English
Fraunhofer-Institut für Umwelt-, Sicherheits- und Energietechnik UMSICHT  
Keyword(s)
  • supercritical carbon dioxide

  • particles from gas saturated solutions

  • perturbed-chain statistical associating fluid theory

  • drying

  • modelling

  • überkritisches Kohlendioxid

  • Hochdrucksprühverfahren

  • Trocknung

  • Modellierung

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