TY - JOUR
T1 - Vapor-liquid equilibrium for the ternary carbon dioxide+ethanol+n-hexane and quaternary carbon dioxide+ethanol+n-hexane+thiophene systems
AU - Mendo-Sánchez, Rubén Pólux
AU - Sánchez-García, Carmen
AU - Galicia-Luna, Luis A.
AU - Elizalde-Solis, Octavio
N1 - Funding Information:
Authors thank to Mexican Institutions ( CONACyT and Instituto Politécnico Nacional ) for the financial support of this research.
PY - 2012/2/15
Y1 - 2012/2/15
N2 - In this work, the experimental vapor-liquid equilibria (VLE) for a ternary and a quaternary system was measured in a static-analytic apparatus from subcritical up to near critical pressures of the systems. The VLE for the ternary carbon dioxide + ethanol + n-hexane system was determined at (313.66, 342.82 and 372.76) K. VLE for the same components in the presence of thiophene was obtained at (313.11, 343.39 and 373.06) K. Combined uncertainties for the measured properties were estimated to be ±0.008. MPa, ±0.03. K, ±0.0019. mol/mol for the vapor phase and ±0.0038. mol/mol for the liquid phase with respect to carbon dioxide composition. A high selectivity of n-hexane over ethanol and thiophene was obtained in both systems in the presence of carbon dioxide for the studied range of temperature and pressure. The vapor-liquid equilibrium data were correlated with the Peng-Robinson equation of state using the classical mixing rule.
AB - In this work, the experimental vapor-liquid equilibria (VLE) for a ternary and a quaternary system was measured in a static-analytic apparatus from subcritical up to near critical pressures of the systems. The VLE for the ternary carbon dioxide + ethanol + n-hexane system was determined at (313.66, 342.82 and 372.76) K. VLE for the same components in the presence of thiophene was obtained at (313.11, 343.39 and 373.06) K. Combined uncertainties for the measured properties were estimated to be ±0.008. MPa, ±0.03. K, ±0.0019. mol/mol for the vapor phase and ±0.0038. mol/mol for the liquid phase with respect to carbon dioxide composition. A high selectivity of n-hexane over ethanol and thiophene was obtained in both systems in the presence of carbon dioxide for the studied range of temperature and pressure. The vapor-liquid equilibrium data were correlated with the Peng-Robinson equation of state using the classical mixing rule.
KW - Carbon dioxide
KW - Ethanol
KW - N-Hexane
KW - Thiophene
KW - Vapor-liquid equilibrium
UR - http://www.scopus.com/inward/record.url?scp=84855199267&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2011.11.009
DO - 10.1016/j.fluid.2011.11.009
M3 - Artículo
SN - 0378-3812
VL - 315
SP - 40
EP - 45
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -