Publication:
A method to evaluate the net membrane distillation coefficient

Loading...
Thumbnail Image
Full text at PDC
Publication Date
1998-05-27
Authors
Peña, Luis
Godino Gómez, María Paz
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier Science BV
Citations
Google Scholar
Research Projects
Organizational Units
Journal Issue
Abstract
A method is proposed that permits to evaluate the net membrane distillation coefficient. The method, which completes and is based on a model previously reported, emphasizes the influence of the unstirred boundary layers on the membrane distillation processes. The searched coefficient is obtained from a set of measurements of thermally driven fluxes, osmotically driven fluxes, and thermally and osmotically driven fluxes. The theory has been applied to the results obtained with two porous hydrophobic membranes, in different experimental conditions. The experiments show that the net coefficient decreases with the mean temperature and permits to quantify the temperature polarization effects. In addition, the heat of vaporization of water may be estimated.
Description
© 1998 Elsevier Science B.V. Economical support from the CICYT is acknowledged.
UCM subjects
Unesco subjects
Keywords
Citation
[1] M.E. Findley, Vaporization through porous membranes, Ind. Eng. Chem., Process Des. Dev. 6 (1967) 226. [2] E. Drioli, Y. Wu, Membrane distillation: An experimental study, Desalination 53 (1985) 339. [3] T.J. van Gassel, K. Schneider, Membranes and Membrane Processes, Plenum Press, New York, 1986, p. 343. [4] G.C. Sarti, C. Gostoli, Membranes and Membrane Processes, Plenum Press, New York, 1986, p. 349. [5] S. Kimura, S. Nakao, S.I. Shimatani, Transport phenomena in membrane distillation, J. Membr. Sci. 33 (1987) 285. [6] R.W. Schofield, A.G. Fane, C.J.D. Fell, Heat and mass transfer in membrane distillation, J. Membr. Sci. 33 (1987) 299. [7] A.C.M. Franken, J.A.M. Nolten, M.H.V. Mulder, D. Bargeman, C.A. Smolders, Wetting criteria for the applicability of membrane distillation, J. Membr. Sci. 33 (1987) 315. [8] R.A. Johnson, Osmotic distillation, Workshop on membrane distillation, Rome, 1986. [9] J.I. Mengual, J.M. Ortiz de Zárate, L. Peña, A. Velázquez, Osmotic distillation through porous hydrophobic membranes, J. Membr. Sci. 82 (1993) 129. [10] L. Peña, J.M. Ortiz de Zárate, J.I. Mengual, Steady states in membrane distillation: Influence of membrane wetting, J. Chem. Soc. Faraday Trans. 89(24) (1993) 4333. [11] M.P. Godino, L. Peña, J.I. Mengual, Membrane distillation: theory and experiments, J. Membr. Sci. 121 (1996) 83. [12] K.W. Lawson, D.R. Lloyd, Membrane distillation, J. Membr. Sci. 124 (1997) 1. [13] J.M. Ortiz de Zárate, F. García López, J.I. Mengual, Temperature polarization in non-isothermal mass transport through membranes, J. Chem. Soc. Faraday Trans. 86(16) (1990) 2891. [14] R.W. Schofield, A.G. Fane, C.J.D. Fell, Gas and vapour transport through microporous membranes. I and II. Knud-sen-Poiseuille transition and membrane distillation, J. Membr. Sci. 53 (1990) 159. [15] A. Velázquez, J.I. Mengual, Temperature polarization coefficients in membrane distillation, Ind. Eng. Chem. Res. 34(2) (1995) 585. [16] N. Pagliuca, U. Bencivenga, D.G. Mita, G. Perna, F.S. Gaeta, Isothermal and non-isothermal water transport in porous membranes II. The steady state, J. Membr. Sci. 33 (1987) 1. [17] J.M. Ortiz de Zárate, F. García López, J.I. Mengual, Nonisothermal water transport through membranes, J. Membr. Sci. 56 (1991) 181. [18] R.W. Schofield, A.G. Fane, C.J.D. Fell, R. Macoun, Factors affecting flux in membrane distillation, Desalination 77 (1990) 279. [19] M.I. Vázquez González, L. Martínez, Water distillation through PTFE hydrophobic membranes in a stirred cell, J. Chem. Soc. Faraday Trans. 90(14) (1994) 2043.
Collections