Characterizing second generation biofuels: Excess enthalpies and vapour-liquid equilibria of the binary mixtures containing 1-pentanol or 2-pentanol and n-hexane

•VLE and HE experimental data are reported for the binary mixtures 1-pentanol or 2-pentanol + n-hexane.•Margules, Wilson, NTRL and UNIQUAC models were used for experimental VLE data reduction.•Positive deviation from the ideal behavior was observed for both mixtures.•Strong endothermic effect was determined for the mixtures which increases with temperature.

Experimental data of excess enthalpies and vapour-liquid equilibria (VLE) are reported for the binary systems (1-pentanol + n-hexane) and (2-pentanol + n-hexane). An isothermal flow calorimeter was used to determine excess enthalpies at T = (298.15 and 313.15) K and the results were fitted using Redlich-Kister equation. Vapour-liquid equilibria data were measured using an isothermal total pressure cell at T = 313.15 K. Barker’s method allows to correlate these data using Margules, Wilson, NRTL and UNIQUAC equations. An endothermic behavior is observed when 1-pentanol or 2-pentanol is mixed with n-hexane whose effect increases at higher temperatures and both systems present a positive deviation from the Raoult’s law.