Mass transfer coefficient of tubular ultrafiltration membranes under high-flux conditions
Mass transfer coefficient of tubular ultrafiltration membranes under high-flux conditions
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DOI：
10.1002/aic.16052
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发表时间：
2018-05
期刊：
影响因子：
3.7
通讯作者：
Kazuki Akamatsu;Keita Ishizaki;S. Yoshinaga;S. Nakao
中科院分区：
文献类型：
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作者：
Kazuki Akamatsu;Keita Ishizaki;S. Yoshinaga;S. Nakao
研究了抽吸流量对管式超滤膜传质系数的影响，特别是在高通量条件下。我们指出 正比于 在紊流条件下，当吸入流的影响不可忽略时，比例常数B超过0.023。我们使用MWCO为20 k和100 k的超滤膜和分子量为40，000和70，000的葡聚糖在以下条件下进行速度变化法，其中 超过了我们证明了抽吸流的影响不仅包括通量，而且还包括溶质的扩散系数，并且通量与扩散系数的比率，表示为，是一个重要的指标。最后，我们得出结论，当 小于，给出戴斯勒方程本身，当 超过。© 2017美国化学工程师学会AIChE J，64：1778-1782，2018
The effect of suction flow on the mass transfer coefficient of tubular ultrafiltration membranes, in particular that under a high‐flux condition, was studied. We pointed out that is proportional to under turbulent conditions, and that the proportional constant, b, exceeds 0.023 when the effect of suction flow is not negligible. We conducted the velocity variation method using ultrafiltration membranes with MWCOs of 20k and 100k and dextrans having molecular weights of 40,000 and 70,000 at the conditions, where exceeded . We demonstrated that the effect of suction flow includes not only flux but also the diffusion coefficient of solute, and that the ratio of the flux to the diffusion coefficient, expressed as , is an important index. Finally, we concluded that , when is smaller than , giving the Deissler equation itself, and that , when exceeds . © 2017 American Institute of Chemical EngineersAIChE J, 64: 1778–1782, 2018