Vapor-liquid equilibria and excess enthalpies of the binary systems 1-pentanol or 2-pentanol and 1-hexene or 1,2,4-trimethylbenzene for the development of biofuels

• Published in: Fluid phase equilibria 2018-03, Vol.460, p.85-94
• Main Authors: Moreau, Alejandro, Segovia, José J., Bermejo, M. Dolores, Martín, M. Carmen
• Format: Article
• Language: English
• Subjects: 1,2,4-Trimethylbenzene; 1-Hexene; 1-Pentanol; 2-Pentanol; Excess enthalpies; VLE
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2017.12.031

Accurate experimental data of vapor-liquid equilibria (VLE) and excess enthalpies are reported for four binary systems: (1-pentanol + 1-hexene), (2-pentanol + 1-hexene), (1-pentanol + 1,2,4-trimethylbenzene) and (2-pentanol + 1,2,4-trimethylbenzene). An isothermal total pressure cell was used for measuring VLE at T = 313.15 K. The data were fitted using Margules, Wilson and NRTL equations. Excess enthalpies were measured at two different temperatures T = (298.15 and 313.15) K using an isothermal flow calorimeter and were correlated by the Redlich-Kister equation. All systems present a positive deviation from the Raoult's Law. An azeotropic behavior with maximum pressure is observed for the mixtures 1-pentanol or 2-pentanol with 1,2,4-trimethylbenzene. In addition, an endothermic behavior, which increases with temperature, is obtained when the alcohols are mixed with these hydrocarbons. •Accurate VLE and HE experimental data are reported for four binary mixtures.•Margules, Wilson and NTRL models give good VLE data reduction.•Maximum pressure azeotropes are obtained in the mixtures with 1,2,4-trimethylbenzene.•Strong endothermic effect which increases with temperature was observed for the mixtures.