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Lignin preparation from oil palm empty fruit bunches by sequential acid/alkaline treatment - A biorefinery approach.

Coral Medina, Jesus David, Woiciechowski, Adenise Lorenci, Zandona, Arion, Noseda, Miguel Daniel, Brar, Satinder Kaur et Soccol, Carlos Ricardo (2015). Lignin preparation from oil palm empty fruit bunches by sequential acid/alkaline treatment - A biorefinery approach. Bioresource Technology , vol. 194 . p. 172-178. DOI: 10.1016/j.biortech.2015.07.018.

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Résumé

Lignin is an important raw material for the sustainable biorefineries and also the forerunner of high-value added products, such as biocomposite for chemical, pharmaceutical and cement industries. Oil palm empty fruit bunches (OPEFB) were used for lignin preparation by successive treatment with 1% (w/w) H₂SO₄ at 121 °C for 60 min and 2.5% NaOH at 121 °C for 80 min resulting in the high lignin yield of 28.89%, corresponding to 68.82% of the original lignin. The lignin obtained was characterized by gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). The results indicated a lignin with molecular masses ramping from 4500 kDa to 12,580 kDa. FTIR and NMR of these lignins showed more syringyl and p-hydroxyphenyl than guaiacyl units. Moderate acid/alkaline treatment provided lignin with high industrial potential and acid hydrolyzates rich in fermentable sugars and highly porous cellulosic fibers.

Type de document: Article
Mots-clés libres: oil palm empty fruit bunches; acid/alkaline pretreatment; lignin extraction; characterization; biorefineries
Centre: Centre Eau Terre Environnement
Date de dépôt: 19 avr. 2018 19:11
Dernière modification: 19 avr. 2018 19:11
URI: https://espace.inrs.ca/id/eprint/3822

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