Optimization of a formic/acetic acid delignification treatment on beech wood and its influence on the structural characteristics of the extracted lignins
[en] Background
In order to replace petrochemicals by bio-based lignin products in a lot of high value-added applications, a formic/acetic acid treatment was adapted to beech wood (Fagus sylvatica L.) for lignin extraction.
Results
Beech wood particles were delignified at atmospheric pressure by a formic acid/acetic acid/water mixture. Cooking time and temperature were optimized for delignification, pulp yield and 2-furfural concentration. Response surface design analysis revealed that delignification yield increased with cooking time and temperature.
Conclusion
The multi-criteria optimization of delignification was used to find the ideal cooking conditions (5h07 min, 104.2°C) which could be satisfactory for the maximization of delignification (70.5%) and pulp yield (58.7%) and, to a lesser extent, for the minimization of 2-furfural production. Treatment conditions were found to influence the chemical structure of extracted lignins. Cooking time and temperature influenced inversely lignin molecular weights.
Disciplines :
Life sciences: Multidisciplinary, general & others
Author, co-author :
Simon, Mathilde
Brostaux, Yves ; Université de Liège - ULiège > Sciences agronomiques > Statistique, Inform. et Mathém. appliquée à la bioingénierie
Vanderghem, Caroline ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Jourez, Benoît ; Université de Liège - ULiège > Forêts, Nature et Paysage > Gestion des ressources forestières et des milieux naturels
Paquot, Michel ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Richel, Aurore ; Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Language :
English
Title :
Optimization of a formic/acetic acid delignification treatment on beech wood and its influence on the structural characteristics of the extracted lignins
Publication date :
2014
Journal title :
Journal of Chemical Technology and Biotechnology
ISSN :
0268-2575
Publisher :
John Wiley & Sons Ltd., Chichester, United Kingdom
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