Designing asymmetric multilayered membrane filters with improved performance
Designing asymmetric multilayered membrane filters with improved performance
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DOI：
10.1016/j.memsci.2016.02.028
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发表时间：
2016-08-01
影响因子：
9.5
通讯作者：
Stewart, P. S.
中科院分区：
文献类型：
--
作者：
Griffiths, I. M.;Kumar, A.;Stewart, P. S.
非对称多层过滤器由一系列相互堆叠的不同孔径的膜组成，允许以各种新颖的方式定制过滤。我们开发了一个网络模型，可以系统地捕获此类多层过滤器中的复杂过滤行为。该模型使我们能够了解系统在遇到特定进料成分（通过颗粒大小和膜粘附性来表征）时的响应。我们展示了该模型如何能够在参数空间中进行全面且省时的扫描，以确定针对给定过滤挑战的最佳多层过滤器配置，按膜层数、每层之间孔径的变化（过滤器锥角）以及每层之间的跨孔互连水平进行分类。该模型使我们能够隔离和分析每个特定过滤器特性的影响，并确定实际的优点和缺点。特别是，我们预测，最大化过滤器吞吐量的最佳布置是孔径随深度逐渐减小，并且孔隙互连性较小，精确设置是颗粒尺寸、粘附性和过滤层数量的函数。分析结果用于得出有关膜过滤器设计的结论，以实现最佳过滤器性能。 (C) 2016 年由 Elsevier B.V. 出版
Asymmetric multilayered filters, comprising a series of membranes with varying pore sizes stacked on top of one another, allow filtration to be tailored in a variety of novel ways. We develop a network model that systematically captures the complex filtration behaviour in such multilayer filters. The model allows us to understand the response of the system when challenged with a particular feed composition, characterized through the particle size and adhesivity to the membrane. We show how the model enables comprehensive and time-efficient sweeps in parameter space to be conducted that determine the optimal multilayered filter configuration for a given filtration challenge, classified by the number of membrane layers, the change in pore size between each layer (filter taper angle), and the level of trans pore interconnectivity between each layer. The model allows us to isolate and analyse the effect of each of the specific filter characteristics and identify the practical merits and disadvantages. In particular, we predict that the optimal arrangement for maximizing throughput through the filter is to have pore radius gradually decreasing with depth, and a slight level of pore interconnectivity, with the precise set-up a function of the particle size, adhesivity and number of filter layers. The results of the analysis are used to draw conclusions on the design of membrane filters for optimal filter performance. (C) 2016 Published by Elsevier B.V.