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8 results on '"Janas, Sébastien"'

5. Influence of steam explosion on the thermal stability of cellulose fibres

Author

Université de Liège - Chimie et bio-industries > Chimie biologique industrielle, UCL - SST/IMCN/BSMA - Bio and soft matter, Université de Liège - Chimie et bio-industries > Technologie des industries agro-alimentaires, UCL - Autre, Jacquet, Nicolas, Quievy, Nicolas, Vanderghem, Caroline, Janas, Sébastien, Blecker, Christophe, Devaux, Jacques, Wathelet, Bernard, Paquot, Michel, Université de Liège - Chimie et bio-industries > Chimie biologique industrielle, UCL - SST/IMCN/BSMA - Bio and soft matter, Université de Liège - Chimie et bio-industries > Technologie des industries agro-alimentaires, UCL - Autre, Jacquet, Nicolas, Quievy, Nicolas, Vanderghem, Caroline, Janas, Sébastien, Blecker, Christophe, Devaux, Jacques, Wathelet, Bernard, and Paquot, Michel

Abstract

The aim of the present study was to compare the effect of different steam explosion treatments on the thermal degradation of a bleached cellulose. The intensity of a steam explosion treatment, which allows breakdown of the structural lignocellulosic material was determined by a correlation between time and temperature of the process. Results of this study showed that thermal degradation of cellulose fibres was limited when the severity factor applied was below 4.0. For higher intensities, determination of the degradation products in the water-soluble extract showed an important increase of the 5-hydroxymethyl-furfural concentration with the temperature. When the severity factor reached 5.2., TGA analysis showed that the increase of degradation products was coupled to an increase of the char level meaning a strong degradation of the cellulose. dTGA behaviour also showed that thermal stability of the steam explosion samples decreased with the intensity of the treatment. To conclude, a theoretical diagram predicting the degradation of the cellulose during the steam explosion treatment was established.

Published
2011

6. Comparaison d'un modèle empirique et d'un modèle physique de séchage de grains de maïs en lit fluidisé.

Author

Janas, Sébastien, Malumba, Paul, Deroanne, Claude, and Béra, François

Subjects
CORN drying, EFFECT of temperature on crops, GRAIN, MASS transfer, AGRICULTURE
Abstract

Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2010

7. Possibilités de prise en compte des phénomènes de transferts internes aux grains lors de la modélisation du séchage en lit fixe du maïs: revue.

Author

Janas, Sébastien, Malumba, Paul, and Béra, François

Subjects
GRAIN transportation, FIXED bed reactors, CORN drying, META-analysis, FOOD preservation, MASS transfer, HEAT transfer
Abstract

Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2012

8. Structure de l'amidon de maïs et principaux phénomènes impliqués dans sa modification thermique.

Author

Malumba, Paul, Janas, Sébastien, Deroanne, Claude, Masimango, Thaddée, and Béra, François

Subjects
CORNSTARCH, HEAT treatment, MICROSTRUCTURE, GELATION, RELAXATION phenomena, LIPIDS, PECTINS, GLASS transition temperature
Abstract

Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2011

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