This paper focuses on providing a pervaporation simulation method for ethanol dehydration from a practical point of view. The simulation procedure is performed by setting up simulation equations which describe the pervaporation process, obtaining the necessary data from pervaporation batch mode pilot tests, verifying the simulation tool through simulations of continuous mode pilot tests, and comparing the simulation results with the real pilot test results. We considered the mass and energy balances that describe separating an ethanol/water mixture by a pervaporation membrane. The simulation equations were mathematically expressed into simultaneous nonlinear differential equations based on these balances. The necessary data for simulation consist of the thermophysical properties for the ethanol-water mixture and the characteristic data of a PVA composite membrane. The membrane characteristic data are permeation flux and membrane selectivity, which are functions of feed composition and operating conditions. These data were experimentally determined by a batch mode pilot test. The continuous mode pilot tests were simulated and the simulation results were compared to the real test results. The results were fairly good.
Daubert DE, Danner RP, "Physical and Thermodynamic Properties of Pure Chemicals: Data Compilation, Design Institute for Physical Property Data," AIChE., Hemisphere Publishing Corporation, 1991
Fleming HL, Chem. Eng. Prog., July, 46, 1992
Fleming HL, Slater CS, "Chapter 10. Pervaporation: Applications and Economics," Membrane Handbook, Ho, W.S.W. and Sirkar, K.K., eds., Van Nostrand Reinhold, New York, 1992
Gmehling J, Onken U, "Vapor-liquid Equilibrium Data Collection, Aqueous-organic Systems," Dechema Chemistry Data Series, Vol. 1, Part 1, DECHEMA, Frankfurt am Main, Germany, 1977
Humphrey JL, Seibert AF, Chem. Eng. Prog., March, 32, 1992
Marin M, Kalantzi K, Gilbert H, J. Membr. Sci., 74, 105, 1992
Mulder MHV, Smolder CA, J. Membr. Sci., 17, 289, 1984
Mulder MHV, Franken ACM, Smolder CA, J. Membr. Sci., 23, 41, 1985
Nguyen TQ, AIChE Symp. Ser., 82(248), 1, 1986
Rapin JL, "The Betheniville Pervaporation Unit-The First Large Scale Production Plant for the Dehydration of Ethanol," Proceedings of Third International Conference on Pervaporation Processes in the Chemical Industry, Englewood, NJ, 364, 1988
Rautenbach R, Albrecht R, J. Membr. Sci., 25, 1, 1985
Rautenbach R, Albrecht R, J. Membr. Sci., 25, 25, 1985
Streicher C, Kremer P, Tomas V, Hubner A, Ellinghorst G, "Development of New Pervaporation Membranes, Systems and Processes to Separate Alcohols/Ethers/Hydrocarbons Mixtures," Proceedings of Seven International Conference on Pervaporation Processes in the Chemical Industry, Reno, Navada, 297, 1995