Modification of flow properties of concentrated lignite dispersions

Concentrated water-based lignite suspensions (pastes) possess unpleasant flow behaviour. Under extrusion-like conditions suspension is rapidly compacted, viscosity rises considerably and flow effectively ceases. Using diluted aqueous solution of carboxymethylcellulose sodium salt as a dispersion med...

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Bibliographic Details
Published in:Colloid and polymer science 2005-10, Vol.284 (1), p.112-116
Main Authors: PEKAR, Miloslav, DIVISOVA, Pavia, KLIMOVIC, Michal
Format: Article
Language:English
Subjects:
Applied sciences
Aqueous solutions
Brown coal
Compacting
Description
Dispersions
Energy
Exact sciences and technology
Fuels
Lignite
Pastes
Pseudoplasticity
Sodium salts
Viscosity
Wood. Peat. Brown coal
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Description
Summary:Concentrated water-based lignite suspensions (pastes) possess unpleasant flow behaviour. Under extrusion-like conditions suspension is rapidly compacted, viscosity rises considerably and flow effectively ceases. Using diluted aqueous solution of carboxymethylcellulose sodium salt as a dispersion medium eliminates this adverse phenomenon and keeps liquid-like flowing of suspension. Moreover, effective dilatant suspension behaviour is transformed to pseudoplastic.[PUBLICATION ABSTRACT]
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-005-1379-1