Phase equilibria measurements of CO2 + methyl cyclopentane and CO2 + isopropyl cyclohexane binary mixtures at elevated pressures

S. Vitu (1) , J.-N. Jaubert (1) , Jérôme Pauly (2) , Jean-Luc Daridon (2) , D. Barth (1, 3, 4)

1 LTMP - Laboratoire de Thermodynamique des Milieux Polyphasés
2 TEFC - Thermodynamique et Energétique des fluides complexes
3 LSGC - Laboratoire des Sciences du Génie Chimique
4 EEIGM - Ecole Européenne d'Ingénieurs en Génie des Matériaux

Using a variable volume high-pressure cell, bubble and dew points of the binary systems carbon dioxide + methylcyclopentane and carbon dioxide + isopropylcyclohexane were measured at temperatures ranging from 292.75 to 373.45 K. The saturation pressures, ranging from 10.6 to 169.8 bar were measured at carbon dioxide mole fractions between 0.1021 and 0.9700. For these two systems, no literature data were available. The experimental results were correlated with the PPR78 model. The average absolute deviations between experimental and predicted saturation pressures are respectively of 4.90 and 5.54 bar for the carbon dioxide + methylcyclopentane and the carbon dioxide + isopropylcyclohexane systems.

Mots clés: Phase equilibria; Predictive equation of state; Group contribution method; Binary system; Supercritical CO2; High-pressure cell

Domaines: Chimie-Physique [physics.chem-ph]

S. Vitu, J.-N. Jaubert, Jérôme Pauly, Jean-Luc Daridon, D. Barth. Phase equilibria measurements of CO2 + methyl cyclopentane and CO2 + isopropyl cyclohexane binary mixtures at elevated pressures. Journal of Supercritical Fluids, 2007, 44 (2), pp.155-163. ⟨10.1016/j.supflu.2007.10.003⟩. ⟨hal-00339106⟩