Particulate clusters and permeability in porous media.pdf (1.31 MB)
Particulate clusters and permeability in porous media
journal contribution
posted on 2012-09-21, 09:21 authored by B.A. Di Giovanni, Faiz Mahdi, Victor Starov, Richard HoldichThe 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.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
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.Publisher
© The Institution of Chemical Engineers. Published by Elsevier B.V.Version
- AM (Accepted Manuscript)
Publication date
2012Notes
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/S0263876211004564ISSN
0263-8762Publisher version
Language
- en