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Copyright (c) 2014 Y.R. Lee, B. Tang, W. Bi, K.H. Row*
This work is licensed under a Creative Commons Attribution 4.0 International License.
Purification of Bioethanol by Ionic Liquid Additives in Distillation System
Corresponding Author(s) : Y.R. Lee
Asian Journal of Chemistry,
Vol. 26 No. 20 (2014)
Abstract
This study examined the potential use of ionic liquid (IL) as additives for the distillation of bioethanol from bioethanol-water mixture and applied an optimized distillation system to the purification of bioethanol from plant fermentation broths. Among the 9 ionic liquids added to the distillation system, [OMIM][BF4] has the greatest effect on the purification of ethanol from aqueous solutions. In addition, the amount of [OMIM][BF4], the initial concentration of ethanol in the mixture and the distillate fractions in the distillation system were studied systematically. Under the optimization distillation system using 2 g of [OMIM][BF4], 20 mL of a 99.4 % (ethanol, v:v) aqueous solution was distilled from 100 mL of a 20 % (bioethanol, v:v) bioethanol-water mixture and the boiling point (71 °C) was lower than that of the bioethanol-water azeotrope.
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References
K.A. Gray, L. Zhao and M. Emptage, Curr. Opin. Chem. Biol., 10, 141 (2006).
M. Balat, H. Balat and C. Oz, Progr. Energy Combust. Sci., 34, 551 (2008).
D. Pimentel, Nat. Resour. Res., 12, 127 (2003).
R.F. Marschner, J. Am. Chem. Soc., 86, 3912 (1964).
S. Widagdo and W.D. Seider, Am. Inst. Chem. Eng., 42, 96 (1996).
A.B. Pereiro, E. Tojo, A. Rodriguez, J. Canosa and J. Tojo, Green Chem., 8, 307 (2006).
M. Seiler, C. Jork, A. Kavarnou, W. Arlt and R. Hirsch, Am. Inst. Chem. Eng., 50, 2439 (2004).
C.P. Fredlake, J.M. Crosthwaite, D.G. Hert, S.N.V.K. Aki and J.F. Brennecke, J. Chem. Eng. Data, 49, 954 (2004).
J.L. Kaar, A.M. Jesionowski, J.A. Berberich, R. Moulton and A.J. Russell, J. Am. Chem. Soc., 125, 4125 (2003).
K.N. Marsh, J.A. Boxall and R. Lichtenthaler, Fluid Phase Equilib., 219, 93 (2004).
H. Lee, J.S. Lee, B.S. Ahn and H.S. Kim, J. Korean Ind. Eng. Chem., 16, 595 (2005).
Y. Ge, L. Zhang, X. Yuan, W. Geng and J. Ji, J. Chem. Thermodyn., 40, 1248 (2008).
A. Arce, E. Rodil and A. Soto, J. Solution Chem., 35, 63 (2006).