Publication: Air gap membrane distillation of aqueous alcohol solutions
Loading...
Official URL
Full text at PDC
Publication Date
2000-04-30
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science BV
Citations
Exportar
Abstract
Aqueous solutions of alcohol (ethanol, methanol or isopropanol) have been experimentally investigated in air gap membrane distillation (AGMD), for a wide range of operating conditions. The effects of the relevant process parameters on the permeate flux have been studied. On the basis of a temperature polarisation model - which takes into account the mass and heat transfers across the hydrophobic membrane - the equivalent film heat transfer coefficient and the overall membrane mass transfer coefficient can be obtained from the experimental data. Also the alcohol and water membrane transfer coefficients have been obtained assuming the validity of Graham's diffusion law for multicomponent mixtures. From these coefficients the temperature and composition in the liquid-vapour interfaces are evaluated, taking into account the temperature polarisation acid concentration polarisation models. Finally, the effect of the Reynolds number on the permeate flux has been discussed using the temperature polarisation model and the heat transfer correlation given by Sieder and Tate.
Description
© 2000 Elsevier Science B.V. The authors would like to thank the CICYT (Spain), Projects ALI-91-1126-CO3-02 and ALI-94-1044-CO3-02, for their financial support.
UCM subjects
Unesco subjects
Keywords
Citation
[1] K.W. Lawson, D.R. Lloyd, Review: membrane distillation, J. Membr. Sci. 124 (1997) 1.
[2] M.C. García Payo, Membrane distillation of aqueous alcohol solutions (in Spanish), Ph.D. Thesis, Universidad Complutense of Madrid, 1998.
[3] G.C. Sarti, C. Gostoli, Use of hydrophobic membranes in thermal separation of liquid mixtures: theory and experiments, Membranes and Membrane Processes (1986) 349.
[4] J.I. Mengual, L. Peña, Membrane distillation, Colloid Interface Sci. 1 (1997) 17.
[5] M.A. Izquierdo Gil, M.C. García Payo, C. Fernández Pineda, Direct contact membrane distillation of sugar aqueous solutions, Sep. Sci. Technol. 34 (1999) 45.
[6] M.A. Izquierdo Gil, M.C. García Payo, C. Fernández Pineda, Air gap membrane distillation of sucrose aqueous solutions, J. Membr. Sci. 155 (1999) 291.
[7] V. Calabro, E. Drioli, F. Matera, Membrane distillation in the textile waste water treatment, Desalination 83 (1991) 209.
[8] H. Udriot, S. Ampuero, I.W. Marison, U. Von Stockar, Extractive fermentation of ethanol using membrane distillation, Biotecnol. Lett. 11 (1989) 509.
[9] H. Udriot, A. Araque, U. Von Stokar, Azeotropic mixtures may be broken by membrane distillation, Chem. Eng. J. 54 (1994) 87.
[10] M. Tomaszewska, M. Gryta, A.W. Morawski, Study on the concentration of acids by membrane distillation, J. Membr. Sci. 102 (1995) 113.
[11] R.W. Schofield, A.G. Fane, C.J.D. Fell, Heat and mass transfer in membrane distillation, J. Membr. Sci. 33 (1987) 299.
[12] T.K. Sherwood, R.L. Pigford, C.R. Wilke, Mass Transfer, McGraw-Hill, New York, 1975.
[13] R.B. Bird, W.E. Stewart, E.N. Lightfoot, Transport Phenomena, Wiley, New York, 1976.
[14] A.P. Colburn, T.B. Drew, The condensation of mixed vapors, Trans. AIChE 33 (1937) 197.
[15] D.Q. Kern, Process Heat Transfer, McGraw-Hill, New York, 1950.
[16] E.A. Mason, A.P. Malinauskas, Gas transport in porous media: the dusty-gas model, Elsevier, Amsterdam, 1983.
[17] X. Feng, R.Y.M. Huang, Concentration polarization in pervaporation separation processes, J. Membr. Sci. 92 (1994) 201.
[18] M. Sudoh, K. Takuwa, H. Iizuka, K. Nagamatsuya, Effects of thermal and concentration boundary layers on vapor permeation in membrane distillation of aqueous lithium bromide solution, J. Membr. Sci. 131 (1997) 1.
[19] R.W. Schofield, A.G. Fane, C.J.D. Fell, R. Macoun, Factors affecting flux in membrane distillation, Desalination 77 (1990) 279.
[20] A.S. Jönsson, R. Wimmerstedt, A.C. Harrysson, Membrane distillation — a theoretical study of evaporation through microporous membranes, Desalination 56 (1985) 237.
[21] R.C. Reid, J.M. Prausnitz, B.E. Poling, The Properties of Gases and Liquids, McGraw-Hill, New York, 1987.
[22] K.C. Pratt, W.A. Wakeham, The mutual diffusion coefficient for binary mixtures of water, Proc. R. Soc. London A 342 (1975) 401.