Design and Optimization of Isopropyl Alcohol-Water Separation using Heterogenous Azeotropic Distillation

Emelia Kezia Lasut; Yansen Hartanto; Herry Santoso

doi:10.26555/chemica.v8i2.20849

Design and Optimization of Isopropyl Alcohol-Water Separation using Heterogenous Azeotropic Distillation

Emelia Kezia Lasut, Yansen Hartanto, Herry Santoso

Abstract

Heterogeneous azeotropic distillation is one technique of separating the mixtures that form azeotropes. In this research, a case study will be carried out on separating a mixture of isopropyl alcohol (IPA) and water where this mixture forms an azeotropic point. IPA is an alcohol that can be converted into diesel fuel through an esterification reaction. This study will use the Aspen Plus v8.8 simulator. The entrainer used were benzene and cyclohexane. The thermodynamic model used was NRTL. The configuration used in this study consists of two distillation columns with one decanter to separate the ternary azeotropic points. Optimization is carried out sequentially by changing one variable while the other variables are kept constant. The variables used are the number of stages, and the location of the feed entered in each column. The objective function used in this optimization is the Total Annual Cost (TAC). This research obtained a heterogeneous azeotropic distillation configuration that produced high-purity IPA and water products. Based on the optimization results, the benzene entrainer is cheaper than the cyclohexane entrainer.

Keywords

Azeotropic; Distillation; Entrainer; Heterogenous; Optimization

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References

Collas, F., Kuit, W., Clement, B., Marchal, R., Lopez-Contreras, A. M., and Monot, F. (2012). Simultaneous production of isopropanol, butanol, ethanol and 2,3-butanediol by Clostridium acetobutylicum ATCC 824 engineered Strains. AMB Express 2:45.

J. Pla-Franco, E. Lladosa, S. Loras, and J. B. MontÃ³n, "Azeotropic distillation for 1-propanol dehydration with diisopropyl ether as entrainer: Equilibrium data and process simulation", Separation and Purification Technology, 212, pp 692 â€“ 698, 2019.

Arifin S. and I. L. Chien, "Combined preconcentrator/recovery column design for isopropyl alcohol dehydration process", Ind. Engng. Chem. Res., 46, pp 2535â€“2543, 2007.

Kiss, A. A. (2013). Advanced Distillation Technologies Design, Control and Applications. The Atrium, Southern Gate, Chichester, West Sussex: John Wiley & Sons Ltd.

Smith, R. (2005), Chemical Process Design and Integration, John Wiley and Sons.

J. Meier-Haack, W. Lenk, D. Lehmann, K. Lunkwitz, "Pervaporation separation of water/alcohols mixtures using composite membranes based on polyelectrolyte multilayer assemblies", J. Membr. Sci. 184 (2001) 233.

Luyben, W. L., & Chien, I.-L. Design And Control Of Distillation Systems For Separating Azeotropes. New Jersey: John Wiley and Sons, Inc, 2010.

Chien, I. L.; Zeng, K. L.; Chao, H. Y. "Design and Control of a Complete Heterogeneous Azeotropic Distillation Column System", Ind. Eng. Chem. Res. 2004, 43, 2160.

Ralph Schefflan (2013), Teach Yourself the Basics of Aspen PlusTM, John Wiley and Sons.

Wang Y., Peizhe Cui, Yuhong Ma and Zhen Zhang, "Extractive distillation and pressure-swing distillation for THF/ethanol separation", Journal of Chemical Technology and Biotechnology, 90, pp 1463-1472, 2014.

Luyben, W. L. (2006), Distillation Design and Control Using AspenTM Simulation, John Wiley and Sons, Inc.

R.J. Manivannan, Tony Cai, Ken McCarley, Anand Vennavelli, Sayeed Mohammad, Clint P. Aichele," Point efficiency of sieve trays at elevated liquid viscocities", Chemial Engineering Research and Design, Vol. 159, pp 138 â€“ 145, 2020.

DOI: http://dx.doi.org/10.26555/chemica.v8i2.20849