Membrane distillation. II. Direct contact MD

Abstract Pure water direct contact membrane distillation (DCMD) experiments were used to measure the permeability parameter associated with the molecular diffusion in membrane distillation (MD). The fluxes given by a recently reported MD model, which is based on the dusty-gas model of gas transport through porous media, showed good agreement with the experimental results over the entire range of feed temperatures studied. The model was also capable of predicting flux as a function of the difference between bulk feed and permeate temperatures for the limiting case in which only molecular diffusion contributes to flow. The DCMD experiments were performed in this work with a new laboratory-scale module that does not require a support for flat-sheet membranes. The resulting DCMD fluxes were two to three times higher than those reported in the literature for either DCMD or reverse osmosis. The MD model was also used to predict the performance of DCMD desalination, and the results were compared to those of reverse osmosis, in terms of both water production rates and NaCl rejection.

[1]  Enrico Drioli,et al.  Theoretical and Experimental Study on Membrane Distillation in the Concentration of Orange Juice , 1994 .

[2]  D. R. Lloyd,et al.  Membrane distillation. I. Module design and performance evaluation using vacuum membrane distillation , 1996 .

[3]  M. Tomaszewska,et al.  Concentration of the extraction fluid from sulfuric acid treatment of phosphogypsum by membrane distillation , 1993 .

[4]  Enrico Drioli,et al.  Membrane distillation in the textile wastewater treatment. , 1991 .

[5]  D. Davis,et al.  Chemical engineering monographs , 1944 .

[6]  Enrico Drioli,et al.  Membrane distillataion in the treatment of aqueous solutions , 1987 .

[7]  E. A. Mason,et al.  Gas Transport in Porous Media: The Dusty-Gas Model , 1983 .

[8]  Anthony G. Fane,et al.  Heat and mass transfer in membrane distillation , 1987 .

[9]  Anthony G. Fane,et al.  Gas and vapour transport through microporous membranes. II. Membrane distillation , 1990 .

[10]  Siegfried Ripperger,et al.  Membranes and modules for transmembrane distillation , 1988 .

[11]  E. Drioli,et al.  Membranes and Membrane Processes , 1986 .

[12]  Yonglie Wu,et al.  An experimental study on membrane distillation-crystallization for treating waste water in taurine production☆ , 1991 .

[13]  V. M. Nikulin,et al.  Treatment of waste water for removing heavy metals by membrane distillation , 1994 .

[14]  Anthony G. Fane,et al.  Factors affecting flux in membrane distillation , 1990 .

[15]  G. C. Sarti,et al.  Use of Hydrophobic Membranes in Thermal Separation of Liquid Mixtures: Theory and Experiments , 1986 .

[16]  Robert E. Kesting,et al.  Synthetic polymeric membranes , 1971 .

[17]  Giulio C. Sarti,et al.  Separation efficiency in vacuum membrane distillation , 1992 .

[18]  Shoji Kimura,et al.  Transport phenomena in membrane distillation , 1987 .

[19]  D. R. Lloyd,et al.  Compaction of microporous membranes used in membrane distillation. I. Effect on gas permeability , 1995 .

[20]  Shoji Kimura,et al.  Experiments on sea water desalination by membrane distillation , 1988 .