Journal
BIORESOURCE TECHNOLOGY
Volume 371, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2023.128591
Keywords
Lignocellulosic biomass; Biphasic system; Enzymatic digestibility; Reactive unaltered lignin; Furfural
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A new cutting-edge lignocellulose fractionation technology was introduced using mannitol-assisted p-toluenesulfonic acid/pentanol pretreatment, resulting in the co-production of glucose, native-like lignin, and furfural. The addition of 5% mannitol increased delignification rate, surface area, biomass porosity, and glucose yield. The extracted lignin exhibited properties of native cellulosic enzyme lignin and the solubilized hemicellulose was converted into furfural. This waste-free biorefinery pathway contributes to a circular bioeconomy.
A new cutting-edge lignocellulose fractionation technology for the co-production of glucose, native-like lignin, and furfural was introduced using mannitol (MT)-assisted p-toluenesulfonic acid/pentanol pretreatment, as an eco-friendly process. The addition of optimized 5% MT in pretreatment enhanced the delignification rate by 29% and enlarged the surface area and biomass porosity by 1.07-1.80 folds. This increased the glucose yield by 45% (from 65.34 to 94.54%) after enzymatic hydrolysis relative to those without MT. The extracted lignin in the organic phase of pretreatment exhibited beta-O-4 bonds (61.54/100 Ar) properties of native cellulosic enzyme lignin. Lignin characterization and molecular docking analyses revealed that the hydroxyl tails of MT were incorporated with lignin and formed etherified lignin, which preserved high lignin integrity. The solubilized hemicellulose (96%) in the liquid phase of pretreatment was converted into furfural with a yield of 83.99%. The MT-assisted pretreatment could contribute to a waste-free biorefinery pathway toward a circular bioeconomy.
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