Particle capture processes and evaporation on a microscopic scale in wet filters

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Title Particle capture processes and evaporation on a microscopic scale in wet filters
Author Mullins, Benjamin James; Braddock, Roger David; Agranovski, Igor E
Year Published 2004
Place of publication San Diego, CA USA
Abstract This paper details results of an experimental study of the capture of solid and liquid aerosols on fibrous filters wetted with water. A microscopic cell containing a single fibre (made from a variety of materials) was observed via a microscope, with a high speed CCD camera used to dynamically image the interactions between liquid droplets, zeolite and PSL particles and fibres. Variable quantities of liquid irrigation were used, and the possibility for subsequent fibre regeneration after clogging or drying was also studied. It was found that drainage of the wetting liquid (water) from the fibres occurred, even at very low irrigation rates when the droplet consisted almost completely of captured particles. It was also found that the fibre was rapidly loaded with captured particles when the irrigation was not supplied. However, almost complete regeneration (removal of the collected cake) by the liquid droplets occurred shortly after recommencement of the water supply. The study also examined the capture of oily liquid aerosols on fibres wetted with water. A predominance of the barrel shaped droplet on the fibre was observed, with oil droplets displacing water droplets (if the oil and fibre combination created a barrel shaped droplet), creating various compound droplets of oil and water not previously reported in literature. This preferential droplet shape implies that whatever the initial substance wetting a filter, a substance with a greater preferential adherence to the fibre will displace the former one.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2004 Elsevier : Reproduced in accordance with the copyright policy of the publisher. This journal is available online - use hypertext links.
Volume 279
Page from 213
Page to 227
ISSN 0021-9797
Date Accessioned 2005-03-30
Language en_AU
Faculty Faculty of Environmental Sciences
Subject PRE2009-Science & Technology
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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