Abstract
Through the integration of the film theory with a pore flow model it is possible to predict the ultrafiltration performance at different operating conditions and for membranes of various pore sizes. At the fluid phase-membrane interface the film theory is used to establish a correlation between the mass transfer coefficient, the Reynolds and the Schmidt numbers. The effect of osmotic pressure and variation of transport properties with concentration is taken into account. Assuming a normal pore size distribution at the membrane surface the mass transfer is described using a pore flow model. p]The predicted values are compared with experimental ultrafiltration data. The experiments were carried out for cellulose acetate membranes with five different pore sizes.
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