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首页> 外文期刊>Journal of Membrane Science >Vacuum assisted removal of volatile to semi volatile organic contaminants from water using hollow fiber membrane contactors II: A hybrid numerical-analytical modeling approach
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Vacuum assisted removal of volatile to semi volatile organic contaminants from water using hollow fiber membrane contactors II: A hybrid numerical-analytical modeling approach

机译：使用中空纤维膜接触器真空辅助去除水中的挥发性至半挥发性有机污染物II：混合数值分析建模方法

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摘要

Applying a new hybrid numerical and analytical approach in the finite element simulator RockFlow/GeoSys for hydraulic flow and mass transport, the efficiency of the removal of organic contaminants from water using a microporous polypropylene hollow fiber membrane module (HFM) was accurately modeled for a large range of operating conditions. The modeling results were validated against 177 experimental measurements under a wide range of operating conditions for 12 organic compounds with different diffusion coefficients and a wide variety of Henry's law constants, from Naphthalene at circa 0.017 to 1,1 -dichloroethene with circa 1.19. The hybrid numerical analytical approach enables prediction of the removal efficiencies within a few minutes, whereas a pure numerical approach would require several hours to days due to numerical stability controls. The input parameters for the model are defined by the geometry of the HFM and the operating conditions, no empirical formulations are applied. This model allows the investigation of the main factors controlling the removal characteristics, e.g., the dependency on Henry's law coefficient, gas side diffusional resistance, and aqueous diffusion limitation, and also enables the efficient design of further organic removal systems based on the HFM technology.
机译：在有限元模拟器RockFlow / GeoSys中将新的混合数值和分析方法应用于液压流量和质量传输，使用微孔聚丙烯中空纤维膜组件（HFM）精确模拟了从水中去除有机污染物的效率工作条件范围。在各种操作条件下，对十二种具有不同扩散系数和亨利定律常数的有机化合物（从大约0.017的萘到大约1.19的1,1-二氯乙烯）进行了177次实验测量，验证了建模结果。混合数值分析方法能够在几分钟内预测去除效率，而纯数值方法由于需要进行数值稳定性控制，因此需要数小时至数天的时间。模型的输入参数由HFM的几何形状和操作条件定义，没有经验公式。该模型允许研究控制去除特性的主要因素，例如对亨利定律的依赖性，气体侧扩散阻力和水扩散极限的依赖性，还可以基于HFM技术高效设计其他有机去除系统。

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