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In situ rheometry of concentrated cellulose fibre suspensions and relationships with enzymatic hydrolysis

Nguyen, Tien-Cuong and Anne-Archard, Dominique and Coma, Véronique and Cameleyre, Xavier and Lombard, Eric and Binet, Cédric and Nouhen, Arthur and To, Kim Anh and Fillaudeau, Luc In situ rheometry of concentrated cellulose fibre suspensions and relationships with enzymatic hydrolysis. (2013) Bioresource Technology, 133. 563-572. ISSN 0960-8524

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Official URL: http://dx.doi.org/10.1016/j.biortech.2013.01.110


This work combines physical and biochemical analyses to scrutinize liquefaction and saccharification of complex lignocellulose materials. A multilevel analysis (macroscopic: rheology, microscopic: particle size and morphology and molecular: sugar product) was conducted at the lab-scale with three matrices: microcrystalline cellulose (MCC), Whatman paper (WP) and extruded paper-pulp (PP). A methodology to determine on-line viscosity is proposed and validated using the concept of Metzner and Otto (1957) and Rieger and Novak’s (1973). The substrate suspensions exhibited a shear-thinning behaviour with respect to the power law. A structured rheological model was established to account for the suspension viscosity as a function of shear rate and substrate concentration. The critical volume fractions indicate the transition between diluted, semi-diluted and concentrated regimes. The enzymatic hydrolysis was performed with various solid contents: MCC 273.6 gdm/L, WP 56.0 gdm/L, PP 35.1 gdm/L. During hydrolysis, the suspension viscosity decreased rapidly. The fibre diameter decreased two fold within 2h of starting hydrolysis whereas limited bioconversion was obtained (10–15%).

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/ 10.1016/j.biortech.2013.01.110
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux - ENSCPB (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Other partners > Institut Polytechnique de Bordeaux - IPB (FRANCE)
Other partners > Université de Bordeaux 1 (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Vietnam Academy of Science and Technology - VAST (VIETNAM)
Laboratory name:
Programme de Bourses d’Excellence 2011 (French Embassy in Viet Nam)
Deposited On:15 Jul 2013 09:55

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