Efficient Fast Fractionation of Biomass Using a Diol-Based Deep Eutectic Solvent for Facilitating Enzymatic Hydrolysis and Obtaining High-Quality Lignin

Cheng, Jinyuan; Liu, Xuze; Zhan, Yunni; Wang, Jia; Meng, Xianzhi; Zhou, Xuelian; Geun Yoo, Chang; Huang, Caoxing; Huang, Chen; Fang, Guigan; Ragauskas, Arthur J.

doi:10.1002/cssc.202301161

DOE OSTI · 2376315

Efficient Fast Fractionation of Biomass Using a Diol-Based Deep Eutectic Solvent for Facilitating Enzymatic Hydrolysis and Obtaining High-Quality Lignin

Cheng, Jinyuan·Liu, Xuze·Zhan, Yunni·Wang, Jia·Meng, Xianzhi·Zhou, Xuelian·Geun Yoo, Chang·Huang, Caoxing·Huang, Chen·Fang, Guigan·Ragauskas, Arthur J.

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Abstract

Current DES pretreatment is often performed under relatively severe conditions with high temperature, long time, and high DES usage. This work studied a short-time diol DES (deep eutectic solvent) pretreatment under mild conditions to fractionate the bamboo, facilitate enzymatic hydrolysis, and obtain high-quality lignin. At an optimized condition of 130 °C for only 10 min, lignin and xylan removal reached 61.34% and 84.15 %, with residual glucan showing a ~90% enzymatic hydrolysis yield. Equally important, the dissolved lignin could be readily recovered with 97.51% yield, exhibiting 96.65 % β-O-4 preservation. The fractionation and lignin protection mechanisms were unveiled by XRD, FTIR, cellulose-DP, 2D HSQC NMR, 31 P NMR and GPC analysis. Finally, this study highlighted that short-time fractionation of bamboo can be achieved by a diol-based DES which is an ideal strategy to upgrade the lignocellulose biomass for high enzymatic hydrolysis yields and high-quality lignin stream.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY delignification diol DES enzymatic hydrolysis lignin protection short-time pretreatment

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Cheng, Jinyuan, Liu, Xuze, Zhan, Yunni, Wang, Jia, Meng, Xianzhi, Zhou, Xuelian, Geun Yoo, Chang, Huang, Caoxing, Huang, Chen, Fang, Guigan, Ragauskas, Arthur J.. 2023-12-20. Efficient Fast Fractionation of Biomass Using a Diol-Based Deep Eutectic Solvent for Facilitating Enzymatic Hydrolysis and Obtaining High-Quality Lignin. https://doi.org/10.1002/cssc.202301161

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