纳滤膜结构特征对纳滤过程分离性能的影响

Effect of nano-filtration membrane characteristics on its separation capacity during the nano-filtration process

以预测纳滤过程分离性能为目的,讨论了纳滤膜结构特征对分离性能的影响。采用基于扩展的Nernst-Planck方程的DSPM模型进行预测,通过计算机模拟计算,研究了纳滤膜孔径(rp)、膜内电荷密度(X)以及膜厚与孔隙率的比值(λ/Ak)对纳滤分离过程的影响,为纳滤膜的工业化应用提供借鉴。

To predict the separation capacity of nano-filtration process,the effect of nano-filtration membrane struc-ture characteristics on its separation capacity is discussed.The DSPM which is based on the extended Nernst-Planck equation has been used for the prediction.By means of the simulated calculation by computer,the effect of pore ra-dius（rp） of nano-filtration membrane,charge density（X） in membrane,and the ratio（λ/Ak） of membrane thickness and porosity on the separation process are studied.It provides valuable reference for the industrial application of nano-filbration membranes.