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Investigation of skin formation during filtration of micro crystalline cellulose

Tuve Mattsson (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik) ; Maria Sedin (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik) ; Hans Theliander (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
FILTRATION (1479-0602). Vol. 13 (2013), 2, p. 114-121.
[Artikel, refereegranskad vetenskaplig]

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, TiO2, 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.

Nyckelord: 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



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Denna post skapades 2013-04-23. Senast ändrad 2017-03-21.
CPL Pubid: 176000

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)

Ämnesområden

Energi
Kemiteknik

Chalmers infrastruktur