Characterization of particle deposition during crossflow filtration as influenced by permeate flux and crossflow velocity using a microfluidic filtration system

被引:0
作者
Hongzhan Di
Gregory J. O. Martin
Dave E. Dunstan
机构
[1] University of Melbourne,Department of Chemical and Biomolecular Engineering
来源
Frontiers of Chemical Science and Engineering | 2021年 / 15卷
关键词
particle deposition; crossflow filtration; microfluidics; confocal microscopy;
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中图分类号
学科分类号
摘要
Particle deposition during crossflow filtration is significantly influenced by the operating conditions, in particular the permeate flux and crossflow velocity. However, there is a lack of detailed knowledge about how deposit layer structures and distributions depend on operating parameters. This study uses a microfluidic visualisation filtration system to examine the influence of operating conditions on the deposition process during crossflow ultrafiltration from a microscopic perspective. Increasing the permeate flux caused an increasing amount of deposition and a thicker deposit layer. Higher crossflow velocities reduced the extent of deposition. The degree of deposition varied over a range of operating conditions due to the altered hydrodynamic forces exerted on the particles, which can be examined by the deposition probability according to an existing model. Building on this, an empirical correlation between the deposition probability and volume of deposition as a function of filtration time was developed, which gave good agreement with experimental results. The effect of solution conditions was also involved in this correlation as a interaction energies. This could be useful for predicting the dynamic deposition process during crossflow filtration over a range of operating and solution conditions. [graphic not available: see fulltext]
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页码:552 / 561
页数:9
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