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Title: Particulate clusters and permeability in porous media
Authors: Di Giovanni, B.A.
Mahdi, F.M.
Starov, Victor
Holdich, R.G.
Keywords: Permeation
Cluster size
Porous media
Sedimentation
Filtration
Issue Date: 2012
Publisher: © The Institution of Chemical Engineers. Published by Elsevier B.V.
Citation: Di Giovanni, B.A. ... et al., 2012. Particulate clusters and permeability in porous media. Chemical Engineering Research and Design, 90 (9), pp. 1168 - 1176.
Abstract: The permeability of particulate colloidal titanium dioxide, P25, was investigated during sedimentation, permeation and filtration when suspended in water at a consistent ionic strength similar to tap water. Happel’s cell model of permeability was used to determine the apparent particle size during these processes, and compared with the size of particle clusters measured using laser diffraction under identical ionic conditions and varying degree of shear. The primary particle size of the P25 was determined to be 28 nm, from consideration of the surface area and density of the particles, and the cluster size during permeation and filtration was close to 100 nm. During sedimentation the cluster size was determined to be close to 10 m, which is the same size obtained by laser diffraction when measuring under conditions of low shear. Using the above two sizes (28 nm and 10 m) as limits in Happel’s permeability model it was possible to determine an ‘operating envelope’ of permeability that matched the experimentally measured values for the sedimentation, permeation and filtration processes.
Description: This article was published in the journal, Chemical Engineering Research and Design [© The Institution of Chemical Engineers. Published by Elsevier B.V.] and the definitive version is available at: http://www.sciencedirect.com/science/article/pii/S0263876211004564
Version: Accepted for publication
DOI: 10.1016/j.cherd.2011.11.019
URI: https://dspace.lboro.ac.uk/2134/10402
Publisher Link: http://dx.doi.org/10.1016/j.cherd.2011.11.019
ISSN: 0263-8762
Appears in Collections:Published Articles (Chemical Engineering)

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