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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; 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: http://espace.inrs.ca/id/eprint/3822

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