Prediction of Ternary Vapor-Liquid Equilibria for Alcohols + Glycerol + Water Systems to Enhance the Quality of Glycerol as Biodiesel Side Product

Eviana D. Setiawati, Asalil Mustain, Gede Wibawa

Abstract


Fossil fuels as the primary energy resources around the world cause significant negative effect on atmosphere. Recently, biodiesel, which primarily produced from renewable resources, has received great attention because of its environmental benefits. Higher chain of alcohols, such as butanol, may be used as solvent to produce biodiesel with glycerol as byproduct. In order to enhance the quality of glycerol as biodiesel side product which meets food and pharmaceutical standards, vapor-liquid equilibria (VLE) data for ternary systems consisting of 1-butanol, 2-methyl-1-propanol, glycerol and water are required to design and optimize the separation process of glycerol. In this work, the prediction of ternary VLE for (1-butanol / 2-methyl-1-propanol + glycerol + water) using UNIFAC model were determined at various temperatures and compositions and compared with the experimental data giving Average Absolute Deviations (AAD) less than 5.7%. The results indicated that UNIFAC was a reliable model for phase equilibria predictions in the mixtures containing of glycerol

Keywords


Vapor-liquid equilibria; 1-butanol; 2-methyl-1-propanol; glycerol; water

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References


S. T. Keera, et al., "Transesterification of vegetable oil to biodiesel fuel using alkaline catalyst," Fuel, vol. 90, pp. 42-47, 2011.

M. B. Oliveira, et al., "Phase equilibria of glycerol containing systems and their description with the Cubic-Plus-Association (CPA) Equation of State," Fluid Phase Equilibria, vol. 280, pp. 22-29, 2009.

C. A. G. Quispe, et al., "Glycerol: Production, consumption, prices, characterization and new trends in combustion," Renewable and Sustainable Energy Reviews, vol. 27, pp. 475-493, 2013.

A. Fredenslund, et al., "Group-contribution estimation of activity coefficients in nonideal liquid mixtures," AIChE Journal, vol. 21, pp. 1086-1099, 1975.

R. Oktavian, et al., "Vapor pressure measurements of ethanol–isooctane and 1-butanol–isooctane systems using a new ebulliometer," Fuel, vol. 107, pp. 47-51, 2013.

G. Wibawa, et al., "Isothermal vapor–liquid equilibrium of ethanol + glycerol and 2-propanol + glycerol at different temperatures," Journal of Chemical & Engineering Data, vol. 60, pp. 955-959, 2015.

H. K. Hansen, et al., "Vapor-liquid equilibria by UNIFAC group contribution. 5. Revision and extension," Industrial & Engineering Chemistry Research, vol. 30, pp. 2352-2355, 1991.

K. FischerJ. Gmehling, "P-x and gamma infin. data for the different binary butanol-water systems at 50 degree.C," Journal of Chemical & Engineering Data, vol. 39, pp. 309-315, 1994 (GSTAR) Model and Its Properties,” The 5th International Conference on Research and Education in Mathematics, 2008.




DOI: http://dx.doi.org/10.12962/j23546026.y2015i1.1172

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