Investigation of skin formation during filtration of micro crystalline cellulose
Artikel i vetenskaplig tidskrift, 2013

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 2 , 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.

Local filtration properties

Filters (for fluids)

Crystalline materials

Comprehensive model

Incompressible cakes

Micro-crystalline cellulose

Model materials

Filtration

Filtration experiments

Cellulose

Industrial sector

Incompressible flow

Skin formation

Författare

Tuve Mattsson

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Maria Sedin

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Hans Theliander

Wallenberg Wood Science Center (WWSC)

Chalmers, Kemi- och bioteknik, Skogsindustriell kemiteknik

Filtration

1479-0602 (ISSN)

Vol. 13 114-121

Styrkeområden

Energi

Ämneskategorier

Kemiteknik