Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11565
Title: Skin effect in nanofiber filtration of submicron aerosols
Authors: Leung, WWF 
Hung, CH
Keywords: Air filtration
Loading
Nanofibers
Pressure drop
Skin layer
Sub-micron aerosol
Issue Date: 2012
Publisher: Pergamon Press
Source: Separation and purification technology, 2012, v. 92, p. 174-180 How to cite?
Journal: Separation and purification technology 
Abstract: Nanofiber filter, with fibers 98-300 nm, has been used to effectively remove sub-micron aerosol. Despite the effectiveness of filtration, the pressure drop of the filter is high and increases with solid aerosol loading. In this study, the pressure drop and filtration efficiency of nanofiber filter were investigated experimentally. In particular, the empirical model of Brown was modified to determine the distribution of aerosol deposit across filter thickness using the experimental parameters. It was found that there is a large pressure drop across the loaded thin nanofiber layer, and likewise aerosol deposit distributed largely non-uniformly across the filter thickness, with more aerosol deposited near the face region compared to the back side. This can be regarded as the skin effect that exists particularly in nanofiber filtration of sub-micron aerosol. This skin effect can be mitigated by installing a microfiber filter upstream of the nanofiber filter. This is confirmed by a lower measured pressure drop across the inhomogeneous dual-layer filter.
Description: Special issue with papers presented at European Conference on Fluid-Particle Separation (FPS 2010)
URI: http://hdl.handle.net/10397/11565
ISSN: 1383-5866
EISSN: 1873-3794
DOI: 10.1016/j.seppur.2011.02.020
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