Fernández Pineda, CristóbalIzquierdo Gil, María AmparoGarcía Payo, María del Carmen2023-06-202023-06-202002-03-31[1] K.W. Lawson, D.R. Lloyd, Review: membrane distillation, J. Membr. Sci. 124 (1997) 1. [2] K.W. Lawson, M.S. Hall, D.R. Lloyd, Compaction of microporous membranes used in membrane distillation. I. Effect on gas permeability, J. Membr. Sci. 101 (1995) 99. [3] J.L. Bert, Membrane compaction: a theoretical and experimental explanation, J. Polym. Sci., Part B: Polym. Lett. 7 (1969) 685. [4] P.F. Fuls, M.P. Dell, I.A. Pearson, Non-linear flow through compressible membranes and its relation to osmotic pressure, J. Membr. Sci. 66 (1992) 37. [5] R.E. Kesting, A.K. Fritzsche, Polymeric Gas Separation Membranes, Wiley, New York, 1993. [6] M.A. Izquierdo Gil, M.C. García Payo, C. Fernández Pineda, Direct contact membrane distillation of sugar aqueous solutions, Sep. Sci. Technol. 34 (9) (1999) 1773. [7] J.I. Mengual, J.M. Ortiz de Zárate, L. Peña, A. Velázquez, Osmotic distillation through porous hydrophobic membranes, J. Membr. Sci. 82 (1993) 129. [8] M. Khayet, P. Godino, J.I. Mengual, Nature of flow on sweeping gas membrane distillation, J. Membr. Sci. 170 (2000) 243. [9] G.C. Sarti, C. Gostoli, S. Bandini, Extraction of organic components from aqueous streams by vacuum membrane distillation, J. Membr. Sci. 80 (1993) 21. [10] M.A. Izquierdo Gil, M.C. García Payo, C. Fernández Pineda, Air gap membrane distillation of sugar aqueous solutions, J. Membr. Sci. 155 (1999) 291. [11] M.C. García Payo, M.A. Izquierdo Gil, C. Fernández Pineda, Air gap membrane distillation of aqueous alcohol solutions, J. Membr. Sci. 169 (2000) 61. [12] R.W. Schofield, A.G. Fane, C.J.D. Fell, Gas and vapour transport through microporous membranes. I. Knudsen–Poiseuille transition, J. Membr. Sci. 53 (1990) 159. [13] R.W. Schofield, A.G. Fane, C.J.D. Fell, Gas and vapour transport through microporous membranes. II. Membrane distillation, J. Membr. Sci. 53 (1990) 173. [14] E.A. Mason, A.P. Malinauskas, R.B. Evans III, Flow and diffusion of gases in porous media, J. Chem. Phys. 46 (8) (1967) 3199. [15] E.A. Mason, A.P. Malinauskas, Gas Transport in Porous Media: The Dusty-Gas Model, Elsevier, Amsterdam, 1983. [16] S. Chapman, T.G. Cowling, The Mathematical Theory of Non-uniform Gases, Cambridge University Press, Cambridge, 1970. [17] R.D. Present, Kinetic Theory of Gases, McGraw-Hill, New York, 1958. [18] E.H. Kennard, Kinetic Theory of Gases, McGraw-Hill, New York, 1938. [19] P.C. Carman, Flow of Gases Through Porous Media, Academic Press, New York, 1956. [20] E.A. Mason, R.B. Evans III, G.M. Watson, Gaseous diffusion in porous media. III. Thermal transpiration, J. Chem. Phys. 38 (8) (1963) 1808. [21] R.W. Schofield, A.G. Fane, C.J.D. Fell, Heat and mass transfer in membrane distillation, J. Membr. Sci. 33 (1987) 299.0376-738810.1016/S0376-7388(01)00605-6https://hdl.handle.net/20.500.14352/59031© 2002 Elsevier Science B.V. The authors wish to thank CICYT (Spain), Project PB-98-07-88, for the financial support accorded to this work.Gas permeation experiments using helium, air and argon and direct contact membrane distillation (DCMD) experiments using distilled water are reported. From gas permeation experiments the characteristic parameters of the Knudsen and Poiseuille transport mechanisms were determined. Such parameters were extrapolated in order to obtain the values corresponding to water vapour and these were used to estimate theoretical fluxes in DCMD processes employing two different models, one proposed by Schofield et al. (with some improvements) and another one according to the "Dusty-Gas" literature. In both models, the different transport mechanisms: ordinary diffusion, Knudsen flow and Poiseuille flow were taken into account. A good agreement between the experimental fluxes and their theoretical predictions was found. A comparison between both models was also carried out. It was proved that in both models the viscous flow could be neglected under our experimental conditions.engjournal articlehttp://dx.doi.org/10.1016/S0376-7388(01)00605-6http://www.sciencedirect.com/restricted access536Direct contact membrane distillationGas permeation"Dusty-gas" modelKnudsen flowOrdinary diffusionViscous flowTermodinámica2213 Termodinámica