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Industrial Crops and Products

Industrial Crops and Products

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Sustainable recycling of phenol-assisted deep eutectic solvent for efficient lignocellulose fractionation and enzymatic hydrolysis

Published:4 December 2024 DOI: 10.1016/j.indcrop.2024.120173
Diyan Wang, Si Hong, Ziyue Chen, Qian Sun, Chao Xie, Jiaming Wang, Aocheng Wei, Lupeng Shao, Xiaojun Shen

Abstract

Pretreatment centers on facilitating the efficient removal of lignin for enhancing enzymatic saccharification but difficulty avoids the formation of the condensed lignin. However, the specific effects of the condensed lignin on cellulose properties are still not clear. Herein, a recyclable lignin-derived phenol-assisted ternary eutectic solvent (DES), with the ability to make lignin's proclivity towards condensation, is proposed for enhancing lignocellulose fractionation and enzymatic hydrolysis. The effect of the DES types, molar ratio, temperature, and time on lignocellulosic fractionation and cellulose structure was explored comprehensively. Under the optimum conditions (choline chloride/phenol/formic acid DES with a molar ratio of 1:0.05:2, 120?°C, 6?h), the DES pretreatment promoted the removal of lignin (76.36?%) and hemicelluloses (85.09?%). Meanwhile, the glucose and xylose yield of the cellulose-rich residue by enzymatic hydrolysis dramatically enhanced to 99.51?% and 76.72?%, which was 4 times and 12 times higher than that of the raw material, respectively. The increased efficiency was due to the introduction of phenol to efficiently promote lignin dissolution, enhancing the accessibility, surface area, and crystallinity of cellulose. After five recycling processes, the recycled DES still preserved an ultrahigh efficiency in lignocellulosic fractionation and enzymatic saccharification. This green phenols-assisted DES pretreatment opens a novel avenue for efficient lignocellulosic fractionation and cellulose enzymatic hydrolysis.

Substances (9)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Acetic acid 64-19-7 C2H4O2 1775 suppliers $10.00-$9280.00
Sodium acetate 127-09-3 C2H3NaO2 1417 suppliers $8.00-$2420.00
Formic acid 64-18-6 CH2O2 1231 suppliers $7.62-$5923.38
Betaine 107-43-7 C5H11NO2 1012 suppliers $4.00-$4341.04
Ethanol 64-17-5 C2H6O 956 suppliers $10.00-$28350.00
Guaiacol 90-05-1 C7H8O2 930 suppliers $5.00-$7454.72
Phenol 108-95-2 C6H6O 906 suppliers $10.16-$6297.50
Tetrabutyl ammonium chloride 1112-67-0 C16H36ClN 655 suppliers $6.00-$3198.90
cellulase 9012-54-8 NULL 519 suppliers $22.00-$2030.00
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