Separation of binary mixtures by thermostatic sweeping gas membrane distillation: I. Theory and simulations

A math. model describing a novel sweeping gas membrane distn. (SGMD) configuration is presented and the sepn. of two volatile components from binary mixts. by this membrane process is theor. investigated. SGMD configuration is modified by using a thermostated sweeping gas in order to enhance the driving forces decrease along the module. A Stefan-Maxwell-based model that includes vapor-liq. equil. and heat and mass transfer relations is used. This model that takes into account temp. and concn. polarization effects as well as temp. and concn. variation along the module length is employed to predict the flux and selectivity under the relevant operating conditions. Finally, a theor. evaluation of this particular configuration with respect to direct contact MD configuration is discussed. [on SciFinder (R)]

[1]  Mohamed Khayet,et al.  Theory and experiments on sweeping gas membrane distillation , 2000 .

[2]  M. Gryta,et al.  Mass transfer of HCl and H2O across the hydrophobic membrane during membrane distillation , 2000 .

[3]  M. C. García-Payo,et al.  Separation of binary mixtures by thermostatic sweeping gas membrane distillation: II. Experimental results with aqueous formic acid solutions , 2002 .

[4]  Giulio C. Sarti,et al.  A desalination process through sweeping gas membrane distillation , 1987 .

[5]  Giulio C. Sarti,et al.  Low energy cost desalination processes using hydrophobic membranes , 1985 .

[6]  E. Korin,et al.  Air sweep water pervaporation with hollow fiber membranes , 1993 .

[7]  Enrico Drioli,et al.  Direct contact membrane distillation: modelling and concentration experiments , 2000 .

[8]  U. Stockar,et al.  Azeotropic mixtures may be broken by membrane distillation , 1994 .

[9]  J. Robert Selman,et al.  Mass-Transfer Measurements by the Limiting-Current Technique , 1978 .

[10]  D. Katz,et al.  Fluid Dynamics and Heat Transfer , 1959 .

[11]  Fawzi Banat,et al.  Desalination by Membrane Distillation: A Parametric Study , 1998 .

[12]  M. C. García-Payo,et al.  Air gap membrane distillation of aqueous alcohol solutions , 2000 .

[13]  Giulio C. Sarti,et al.  Separation of liquid mixtures by membrane distillation , 1989 .

[14]  M. C. García-Payo,et al.  Direct Contact Membrane Distillation of Sugar Aqueous Solutions , 1999 .

[15]  Ross Taylor,et al.  Multicomponent mass transfer , 1993 .

[16]  M. Shannag,et al.  On the effect of inert gases in breaking the formic acid–water azeotrope by gas-gap membrane distillation , 1999 .

[17]  Mohamed Khayet,et al.  Nature of flow on sweeping gas membrane distillation , 2000 .

[18]  R. Sardesai,et al.  Verification of multicomponent mass transfer models for condensation inside a vertical tube , 1981 .

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

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