Abstract
The diffusion distillation is the evaporation and diffusion process below the boiling temperature of the mixture in a gap filled with the inert gas. It can separate the azeotropic mixture of ethanol and water. The mass transfer in a differential single column can be described by the Maxwell-Stefan equations. Differential mass balances which can extend a column model from a differential single column to an integral column and heat balances were suggested. The new model considers the sensible heat transfers and develops algorithm which enables to calculate interfacial temperature more precisely at condensing liquid film and include one more iterative loop. The results are compared with the experimental data and other models.
Similar content being viewed by others
References
Ackermann, G.,“Heat Transfer and Molecular Mass Transfer in the Same Field at High Temperatures and Large Partial Pressure Differences”, VDI Forschungsh.,8, 1 (1937).
Bird, R. B., Stewart, W. E. and Lightfoot, E. N.,“Transport Phenomena”, Wiley, New York, 1960.
Carty, R. and Schrodt, J. T.,“Concentration Profiles in Ternary Gas Diffusion”,Ind. Eng. Chem. Fundam.,14, 276 (1975).
Chung, I. S., Song, K. M., Hong, W. H. and Chang, H. N., “Ethanol Dehydration by Evaporation and Diffusion in an Inert Gas Layer”,HWAHAK KONGHAK,32, 734 (1994).
Colburn, A. P. and Hougen, O. A.,“Design of Cooler/Condensers for Mixtures of Vapours with Non-condensing Gases”,Ind. Eng. Chem.,25, 1178 (1934).
Cussler, E. L.,“Multicomponent Diffusion”, Elsevier Scientific Publishing Company, Amsterdam, 1976.
Fullarton, D. and Schlünder, E. U.,“Diffusion Distillation: A New Separation Process for Azeotropic Mixtures”,Chem. Eng. Fundam.,2, 53 (1983).
Gmehling, J. and Onken, U.,“Vapour-Liquid Equilibrium Data Collection Series Vol. 1”, DECHEMA, Frankfurt-am-Main, 1977.
Kim, S. C., M. S. Thesis, KAIST, Taejon, Korea (1994).
Krishna, R. and Standart, G. L.,“A Multicomponent Film Model Incorporating a General Matrix Method of Solution to the Stefan-Maxwell Equations”,AIChE J.,22, 383 (1976).
McDowell, J. K. and Davis, J. F.,“A Characterization of Diffusion Distillation for Azeotropic Separation,Ind. Eng. Chem. Res.,27, 2139 (1988).
Sandall, O. and Dribika, M. M.,“Simultaneous Heat and Mass Transfer for Multicomponent Distillation in Continuous Contact Equipment”, Paper Pres. 3rd Int. Symp. on Distillation, London (1979).
Stewart, W. E. and Prober, R.,“Matrix Calculation of Multicomponent Mass Transfer in Isothermal Systems”,Ind. Eng. Chem. Fund,3, 224 (1964).
Taylor, R. and Smith, L. W., “On Some Explicit Approximate Solutions of the Maxwell-Stefan Equations for the Multicomponent Film Model”,Chem. Eng. Commun.,14, 361 (1982).
Taylor, R. and Webb, D. R.,“Film Models for Multicomponent Mass Transfer; Computational Methods: the Exact Solution of the Maxwell-Stefan Equation”,Comput. Chem. Eng.,5, 61 (1981).
Toor, H. L.,“Solution of the Linearized Equations of Multicomponent Mass Transfer”,AIChE J.,10, 448 (1964).
Webb, D. R. and Saradesai, R. G.,“Verification of Multicomponent Mass Transfer Models for Condensation Inside a Vertical Tube”,Int. J. Multiphase Flow,5, 507 (1981).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kim, S.C., Lee, D.W. & Hong, W.H. Modeling of ethanol dehydration by diffusion distillation in consideration of the sensible heat transfer. Korean J. Chem. Eng. 13, 275–281 (1996). https://doi.org/10.1007/BF02705950
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02705950