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Vapor- liquid equilibria and excess Gibbs energies of cyclopentanone + chloroalkane binary mixtures

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: Barhala A., Dragoescu D., Teodorescu M., Wichterle I.

Editorial: 14th Romanian International Conference on Chemistry and Chemical Engineering, RICCCE 14, September 22-24, Bucharest, Romania, 2, p.25-34, 2005.

Rezumat:

Isothermal P-x vapour-liquid equilibrium data for the binary mixtures of cyclopentanone + 1,2-dichloroethane (I) and 1,1,1-trichloroethane (II) within the temperature range 298.15 – 313.15 K were measured by a static method. The mixtures were prepared by weight and were degassed directly in the equilibrium cell. The experimental data were correlated by the maximum likelihood method and different expressions for excess Gibbs energy were tested. The results indicate negative deviation (GE < 0) from ideality for mixture (I), while mixture (II) behaves almost ideally, with slightly positive deviations (GE > 0). The obtained experimental data were compared with those calculated by DISQUAC and UNIFAC methods.

Cuvinte cheie: VLE, excess Gibbs molar energy, excess molar enthalpy, data modelling, DISQUAC, UNIFAC