Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 10, Issue 6, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2022.108764
Keywords
Fractionation; Peracetic acid and maleic acid; Organic solvent; Lignin; Xylose
Categories
Funding
- Innovation Team Project of the Education Ministry [IRT-17R105]
- Open Project of the State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) [KF2020202]
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As an efficient lignocellulose fractionation process, peracetic acid and maleic acid (PAM) pretreatment is integrated into a multi-product platform for the simultaneous manufacture of cellulose, lignin, and xylose. The strategy employs various organic solvents for the recovery of xylose and lignin, with 2-methyltetrahydrofuran (2-MeTHF) showing superior performance. The recovered lignin is esterified with maleic acid during PAM pretreatment, enhancing its antioxidant ability.
As an efficient lignocellulose fractionation process, peracetic acid and maleic acid (PAM) pretreatment is inte-grated into a multi-product platform for the simultaneous manufacture of cellulose, lignin, and xylose. Employing such strategy, 100 g corn stover (dry basis) yielded 39.63 g cellulose-rich solids along with 11.88 g xylose and 12.00 g lignin recovered from the pretreatment liquor. The recovery of xylose and lignin was assessed with various organic solvents, of which 2-methyltetrahydrofuran (2-MeTHF) showed superior performance, giving high lignin yield (75.23%) and xylose yield (67.32%). The recovered lignin (2-MeTHF-L) was charac-terized by high purity, relatively low molecular weight, and large numbers of carboxyl group. Besides, 2D-HSQC NMR analysis revealed that the 2-MeTHF-L was esterified with maleic acid during PAM pretreatment, partly responsible for its enhanced antioxidant ability. This strategy maximizes feedstock utilization and improves the processability in downstream valorization, offering a prospect for sustainable and efficient biorefineries.
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