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Optimization of a formic/acetic acid delignification treatment on beech wood and its influence on the structural characteristics of the extracted lignins
Author(s) -
Simon Mathilde,
Brostaux Yves,
Vanderghem Caroline,
Jourez Benoit,
Paquot Michel,
Richel Aurore
Publication year - 2014
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4123
Subject(s) - furfural , lignin , beech , formic acid , acetic acid , chemistry , pulp (tooth) , yield (engineering) , pulp and paper industry , extraction (chemistry) , response surface methodology , nuclear chemistry , organic chemistry , chromatography , botany , materials science , catalysis , composite material , medicine , pathology , engineering , biology
Background In order to replace petrochemicals by bio‐based lignin products in 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 (5 h 07 min, 104.2 °C) to maximize delignification (70.5%) and pulp yield (58.7%) and, to a lesser extent, minimize 2‐furfural production. Treatment conditions were found to influence the chemical structure of extracted lignins. Cooking time and temperature inversely influenced lignin molecular weights. © 2013 Society of Chemical Industry