Di Giovanni, BA, Mahdi, FM orcid.org/0000-0002-3046-4389, Starov, VM et al. (1 more author) (2012) Particulate clusters and permeability in porous media. Chemical Engineering Research and Design, 90 (9). pp. 1168-1176. ISSN 0263-8762
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 28nm, from consideration of the surface area and density of the particles, and the cluster size during permeation and filtration was close to 100nm. During sedimentation the cluster size was determined to be close to 10m, which is the same size obtained by laser diffraction when measuring under conditions of low shear. Using the above two sizes (28nm and 10m) 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.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Keywords: | permeation; cluster size; porous media; sedimentation; filtration |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 May 2019 11:26 |
Last Modified: | 14 May 2019 11:26 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.cherd.2011.11.019 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121828 |