Experimental vapor-liquid equilibria of pure compounds and binary systems (furfural + γ-valerolactone or γ-butyrolactone) and (5-methylfurfural + γ-valerolactone or γ-butyrolactone) encountered in biorefineries

This study investigates the vapor pressures of the platform chemicals furfural and 5-methylfurfural, as well as their binary mixtures with bio-derived solvents γ-valerolactone and γ-butyrolactone, using a static isothermal apparatus. Measurements were conducted over a range of 5 Pa to 10 kPa and 273.15 K to 363.15 K. The experimental data for the pure compounds were compared with literature values, while no reference data were available for the binary systems. The results were subsequently correlated using the NRTL and UNIQUAC models.