One-step lignocellulose fractionation using acid/pentanol pretreatment for enhanced fermentable sugar and reactive lignin production with efficient pentanol retrievability

Meysam Madadi, Zahoor, Guojie Song, Keikhosro Karimi, Daochen Zhu, Mahdy Elsayed, Fubao Sun, Abdelfatah Abomohra

Onderzoeksoutput: Articlepeer review

29 Citaten (Scopus)

Samenvatting

To valorize whole lignocellulosic biomass, this study proposed a biphasic solvent system using dilute acid (DA)/pentanol pretreatment. Effects of the key factors, i.e., temperature and pentanol concentration, on aspen were evaluated. Under identified optimal pretreatment conditions (160 °C, 60% pentanol), 85% and 91% of lignin and hemicellulose were solubilized in separate organic and liquid phases, respectively, while 91.1% of cellulose was retained in solid fraction. Enzymatic digestibility efficiency of pretreated cellulose was ∼ 6.4-times higher than that of untreated biomass. Notably, excellent pentanol recovery rates were obtained after four-times recycling (84%) with great cellulose digestibility (81%) and delignification (71%) performance. The recovered lignin contained low levels of contaminated sugars (<1%), while it could stabilize and protect high amounts of β-O-4 bonds. Besides, high phenolic OH content was found in lignin, which could be utilized for lignin-based biomaterials. Therefore, DA/pentanol pretreatment is an innovative promising technology for lignocellulosic valorization towards biorefinery.

Originele taal-2English
Artikelnummer127503
Aantal pagina's10
TijdschriftBioresource technology
Volume359
DOI's
StatusPublished - sep 2022

Bibliografische nota

Funding Information:
The authors would like to express their thanks to the National Natural Science Foundation of China (31971314, 32061513) and the Key Research and Development Program of Jiangsu Province (BE2021691) for supporting this work.

Publisher Copyright:
© 2022 Elsevier Ltd

Copyright:
Copyright 2022 Elsevier B.V., All rights reserved.

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