Vapor-liquid equilibrium for the {R-OH plus R-palmitate} systems at 50.3 and 101.3 kPa

Author(s)

V. Freire, Nian ; Nunes, Matheus C. ; Arce, Pedro F.

• Document type: Journal article
• Source: FUEL; v. 333, p. 10-pg., 2023-02-01.

Abstract

Fossil sources of energy become focus of many debates due to the pollution caused by them. In this scenario, renewable fuels, as biodiesel, are studied to improve their production efficiency and become more competitive with fossil fuels and even substitute them. Biodiesel, produced by the transesterification reaction, is constituted by a mixture of fatty acid esters and needs to be separated from its reactional solution in order to be commer-cialized. To improve the separation processes, the thermodynamic behavior of the mixtures involving compo-nents of the biodiesel needs to be known. Aiming this, the vapor-liquid equilibrium (VLE) of the methanol + methyl palmitate and ethanol + ethyl palmitate systems was analyzed at 50.3 and 101.3 kPa and the experi-mental data were submitted to a thermodynamic consistency test and thermodynamic modeling with the Peng-Robinson (PR), Group Contribution Volume Translated Peng-Robinson (GC-VT-PR) and the Perturbed Chain -Statistical Associating Fluid Theory (PC-SAFT) equations of state. Experimental data were considered thermo-dynamically consistent, and the modeling showed good results in terms of the lowest relative deviations of temperature and vapor mole fraction obtained with the GC-VT-PR and PC-SAFT models. (AU)

• FAPESP's process: 15/05155-8 - Modeling of the thermophysical properties of pure fluids (ionic liquids and components present in natural products) and thermodynamic behaviour of the phase equilibrium of mixtures
• Grantee: Pedro Felipe Arce Castillo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/18185-3 - Experimental measurements, consistency and thermodynamic modeling of the vapor-liquid equilibrium of the ethanol + ethyl palmitate system (1.0 ATM)
• Grantee: Matheus Cardoso Nunes
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 18/03739-0 - EXPERIMENTAL MEASUREMENT, CORRELATION AND PREDICTION OF THE FLUID PHASE BEHAVIOR OF SYSTEMS CONTAINING IONIC LIQUIDS (IMIDAZOLIUM) AND SUPERCRITICAL CO2.
• Grantee: Pedro Felipe Arce Castillo
• Support Opportunities: Regular Research Grants