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Electroosmotic dewatering of cellulose nanocrystals
KTH. Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Royal Inst Technol, Wallenberg Wood Sci Ctr, S-10044 Stockholm, Sweden..
KTH. Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Royal Inst Technol, Wallenberg Wood Sci Ctr, S-10044 Stockholm, Sweden..
KTH. Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Royal Inst Technol, Wallenberg Wood Sci Ctr, S-10044 Stockholm, Sweden..
KTH. Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden.;Chalmers Univ Technol, Royal Inst Technol, Wallenberg Wood Sci Ctr, S-10044 Stockholm, Sweden..
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2018 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 25, no 4, p. 2321-2329Article in journal (Refereed) Published
Abstract [en]

One of the main challenges for industrial production of cellulose nanocrystals is the high energy demand during the dewatering of dilute aqueous suspensions. It is addressed in this study by utilising electroosmotic dewatering to increase the solid content of suspensions of cellulose nanocrystals. The solid content was increased from 2.3 up to 15.3 wt%, i.e. removal of more than 85% of all the water present in the system, at a much lower energy demand than that of thermal drying. Increasing the strength of the electric field increased not only the dewatering rate but also the specific energy demand of the dewatering operation: the electric field strength used in potential industrial applications is thus a trade-off between the rate of dewatering and the energy demand. Additionally, it was found that high local current intensity had the potential of degrading cellulose nanocrystals in contact with the anode. The maximum strength of the electric field applied should therefore be limited depending on the equipment design and the suspension conditions.

Place, publisher, year, edition, pages
SPRINGER , 2018. Vol. 25, no 4, p. 2321-2329
Keywords [en]
Cellulose nanocrystals, Nanocellulose, Electroosmotic dewatering, Solid-liquid separation, Energy demand
National Category
Energy Systems Other Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-226190DOI: 10.1007/s10570-018-1733-3ISI: 000428925300012Scopus ID: 2-s2.0-85044764758OAI: oai:DiVA.org:kth-226190DiVA, id: diva2:1206190
Note

QC 20180516

Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2018-05-16Bibliographically approved

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Theliander, Hans

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Wetterling, JonasSahlin, KarinMattsson, TuveWestman, GunnarTheliander, Hans
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