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Closed Access item Electrostatic precipitation of ultrafine particles enhanced by simultaneous diffusional deposition on wire screens.

Authors:Alonso Gámez, Manuel
Alguacil, Francisco José
Keywords:Fiber filter, Electrostatic precipitator, Flue gas dust removal, Physicochemical purification, Nanoparticle, Submicron particle, Ultrafine particle, Aerosols, Flue gas purification
Issue Date:2002
Publisher:Air & Waste Management Association
Citation:Journal of the Air & Waste Management Association 52 (11) : 1342-1347 (2002)
Abstract:A laboratory-scale electrostatic precipitator has been designed and constructed in which the grounded collector plate has been substituted by a set of wire screens placed perpendicularly to the gas flow. Particles are deposited onto the screens by two mechanisms-electrostatic deposition and diffusional deposition-which act simultaneously. On the one hand, electrostatic deposition is effective for relatively large particles, but it is quite ineffective for the smallest ones because their charging probability in the corona field is too low. On the other hand, the diffusional collection efficiency of particles on fibers is high for small particles but low for the larger ones. Therefore, the simultaneous diffusional-electrostatic precipitation may become a useful technique for efficient filtration of particles below 0.1 μm. A preliminary experimental evaluation of this filtering device has shown that submicrometer particles with diameters down to a few nanometers can be collected with number efficiencies greater than 99%.
Publisher version (URL):http://secure.awma.org/journal/Archives.aspx
URI:http://hdl.handle.net/10261/43825
ISSN:1096-2247
Appears in Collections:(CENIM) Artículos

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