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Local solidosity of microcrystalline cellulose during dead-end filtration and sedimentation
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
2013 (English)In: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 91, no 6, 1155-1162 p.Article in journal (Refereed) Published
Abstract [en]

Solid-liquid separation by filtration and sedimentation are important operations used in a wide range of industries. One important characteristic of both the filtration and sedimentation processes is the solidosity of the filter cake/sediment that is formed, affecting the efficiency and design of the separation. In this study local solidosity was investigated using a gamma-attenuation method during both filtration and sedimentation experiments for microcrystalline cellulose, a highly crystalline cellulose with particles of about 2-80 mu m in diameter. Constitutive relationships for the solidosity were investigated using both filtration (i.e. cake build-up and expression) and sedimentation data for experiments at different pH and suspension concentrations. The sedimentation behaviour under these different conditions was also investigated. It was found that a three parameter empirical model could be used to describe the constitutive relationship between local solidosity and local solid compressible pressure for the sediment formed and the filter cake after both cake build-up and expression. This correlation worked well for the material investigated even at low solid compressible pressures.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 91, no 6, 1155-1162 p.
Keyword [en]
Sedimentation, Dead-end filtration, Local filtration properties, Micro crystalline cellulose, Separation, Constitutive relationships
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-124980DOI: 10.1016/j.cherd.2013.01.007ISI: 000320495600021ScopusID: 2-s2.0-84878192915OAI: diva2:638973
Knut and Alice Wallenberg FoundationSwedish Research Council

QC 20130805

Available from: 2013-08-05 Created: 2013-08-02 Last updated: 2013-08-05Bibliographically approved

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Theliander, Hans
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