PHASE EQUILIBRIUM ENGINEERING OF CO2 + PROPANE MIXTURES AS NEAR CRITICAL SOLVENTS

P. HEGEL; L.J. ROVETTO; S. PEREDA; E.A. BRIGNOLE

Florianopolis, Brazil

Congreso; V Encontro Brasileiro de Fluidos Supercríticos; 2004

Fatty oil and derivatives are usually extracted with near critical fluids. The use of Propane + Carbon Dioxide mixtures can offer special properties regarding solvent power and selectivity. In the present work the phase equilibrium engineering behaviour of mixtures of Propane + Carbon Dioxide and their transition in phase behaviour type is studied. For this purpose is applied a group contribution thermodynamic model, GCA-EOS, tuned for asymmetric mixtures which present complex multiphase behaviour.