PLAPIQUI   05457
PLANTA PILOTO DE INGENIERIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Thermodynamic consistency of experimental VLE data for asymmetric binary mixtures at high pressures
Autor/es:
VICTOR M. TREJOS; JIMMY A. LÓPEZ-JIMÉNEZ; CARLOS A. CARDONA
Revista:
FLUID PHASE EQUILIBRIA
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2010 vol. 293 p. 1 - 10
ISSN:
0378-3812
Resumen:
A thermodynamic consistency of isothermal vaporliquid equilibrium data for 9 non-polar and 8 polar binary asymmetric mixtures at high pressures has been evaluated. A method based on the isothermal GibbsDuhem equation was used for the test of thermodynamic consistency using a phiphi approach. The PengRobinson equation of state coupled with the WongSandler mixing rules were used for modeling the vaporliquid equilibrium (VLE) within the thermodynamic consistency test. The VLE parameters calculations for asymmetric mixtures at high pressures were highly dependent on bubble pressure calculation, making more convenient to eliminate the data points yielding the highest deviations in pressure. However the results of the thermodynamic consistencies test of experimental data for many cases were found not fully consistent. As a result, the strategies for solving these problems were discussed in detailed.