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Investigating skin formation during the filtration of micro-crystalline cellulose
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center. Chalmers University of Technology, Sweden.
2013 (English)In: FILTRATION, ISSN 1479-0602, Vol. 13, no 2, 114-121 p.Article in journal (Refereed) Published
Abstract [en]

Separating solids from liquids through filtration is an important unit operation employed in a wide range of industrial sectors. It is vital that accurate and applicable models are employed when designing industrial sized filters. Comprehensive models are readily available for materials that form incompressible cakes, whereas those for compressible cakes are lacking. Materials that form compressible filter cakes may also form a dense initial cake close to the filter medium, i.e. a 'skin'. In this study the local filtration properties of a model material, TiO<inf>2</inf>, and micro-crystalline cellulose (MCC), are measured to investigate skin formation in a compressible filter cake. Indications of the formation of a skin in the filtration experiments using MCC could be observed; local pressure measurements were found to be useful in the investigation of its formation. Both the choice of the filter medium and the electrostatic interactions affected the skin formation. The tendency for skin to form was reduced at a lower pH, this lower pH corresponding to less charged particles and filter media.

Place, publisher, year, edition, pages
2013. Vol. 13, no 2, 114-121 p.
Keyword [en]
Cellulose, Crystalline materials, Filters (for fluids), Incompressible flow, Comprehensive model, Filtration experiments, Incompressible cakes, Industrial sector, Local filtration properties, Micro-crystalline cellulose, Model materials, Skin formation, Filtration
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-175139Scopus ID: 2-s2.0-84940237961OAI: oai:DiVA.org:kth-175139DiVA: diva2:859998
Note

QC 20151009

Available from: 2015-10-09 Created: 2015-10-09 Last updated: 2017-05-30Bibliographically approved

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