Vapor–liquid equilibrium for propylene glycols binary systems: Experimental data and regression

Synthesis and simulation of a distillation columns system for the propylene glycols mixtures separation

“…The VLE data for the water + propylene glycol binary systems in the temperature range of 295.15 to 460.15 K and pressure up to 34.529 kPa and for the propylene glycol + propylene glycol binary systems in the temperature range of 350.15 to 510.15 K and pressures up to 34.374 kPa were published in our previous studies. 34,35 The VLE data for the mixtures water + MPG and MPG + DPG 33 were the only equilibrium data for these systems, available in the literature, at the time when we have accomplished the above experimental data. The VLE experimental data presented in our previous works were determined at low pressures because the separation process we propose in this study can operate only in these conditions.…”

“…The VLE experimental data were regressed to obtain binary interaction parameters for NRTL (nonrandom two-liquids) activity coefficients. [36][37][38][39] The simulation of the distillation columns system for separation of the propylene glycols mixtures was performed with the PRO/II 33 software using the specific correlations for the TePG properties 2 and using NRTL 36 thermodynamic model that contain the resulted binary interaction parameters reported by Fendu and Oprea 34,35 for the binary mixtures formed by the components involved.…”