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The mass transfer coefficient k is an important parameter for predicting the concentration polar-ization of reverse osmosis and other membrane separation processes.In order to determine the k valueprecisely,a limiting diffusion current method with specially designed porous electrode has been devel-oped.This method can be used to determine the k values for both one dimensional and two dimensionalflow.It seems that the actual situation of membrane process is closely approached,so the dimensionlessempirical equations obtained have a practical significance.The equations of present work have been compared with the data of previous authors,and manyresults seem to be in good agreements.Therefore this paper offers useful reference for the investiga-tion and design of diversified membrane separation systems in future.
The mass transfer coefficient k is an important parameter for predicting the concentration polar-ization of reverse osmosis and other membrane separation processes. In order to determine the k value precise, a limiting diffusion current method with specially designed porous electrode has been devel- oped.This method can be used to determine the k values for both one and two dimensional flow. It seems that the actual situation of the membrane process is closely approached, so the dimension equations experiment equations have have a practical significance. The equations of present work have been compared with the data of previous authors, and manyresults seem to be in good agreements.Therefore this paper offers useful references for the investiga- tion and design of diversified membrane separation systems in future.