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首页> 外文期刊>Journal of Applied Polymer Science >Effect of Swelling on Mass Transfer Performance in Membrane Extraction
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Effect of Swelling on Mass Transfer Performance in Membrane Extraction

机译：溶胀对膜萃取中传质性能的影响

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The membrane extraction experiments were performed with tributyl phosphate/acetic acid (HAc)/water, n-butanol/HAc/water and 20% Alamine (in kerosene); HAc; and water as working systems. HAc was transferred from the aqueous phase to the organic phase. The effect of flat membranes seelling on mass transfer was studied. The membranes were microporous polysulfone and microporous polytetrafluoroethylene.The overall mass transfer coefficients based on the water phase were calculated and compared between nonswollen and swollen membranes. The experimental results show that the physical structure of the flat membranes used in our experiments was changed if soaked by organic solvents;however,change in thickness was not found.The overall mass transfer coefficients clearly were decreased after the flat membranes were swollen. The most likely reason is that the mass transfer resistance was increased because of the change of the membrane structure. The results also show that it is better to choose a hydrophilic membrane to reach high mass transfer performance when the equilibrium constant is very low.
机译：用磷酸三丁酯/乙酸（HAc）/水，正丁醇/ HAc /水和20％的铝胺（在煤油中）进行膜萃取实验。 HAc;和水作为工作系统。 HAc从水相转移到有机相。研究了平膜固着对传质的影响。膜为微孔聚砜和微孔聚四氟乙烯。计算了基于水相的总传质系数，并比较了未膨胀和膨胀的膜。实验结果表明，本实验所用的平膜的物理结构在被有机溶剂浸泡后发生了变化;但是，厚度没有变化。溶胀后，整体传质系数明显降低。最可能的原因是由于膜结构的改变而增加了传质阻力。结果还表明，当平衡常数非常低时，最好选择亲水膜以达到较高的传质性能。

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