Facilitating enzymatic hydrolysis with a novel guaiacol-based deep eutectic solvent pretreatment

Huang, Chen; Zhan, Yunni; Cheng, Jinyuan; Wang, Jia; Meng, Xianzhi; Zhou, Xuelian; Fang, Guigan; Ragauskas, Arthur J.

doi:10.1016/j.biortech.2021.124696

Facilitating enzymatic hydrolysis with a novel guaiacol-based deep eutectic solvent pretreatment

Journal Article · Tue Jan 12 00:00:00 EST 2021 · Bioresource Technology

DOI:https://doi.org/10.1016/j.biortech.2021.124696· OSTI ID:1769227

Huang, Chen ^[1]; Zhan, Yunni ^[2]; Cheng, Jinyuan ^[2]; Wang, Jia ^[3]; Meng, Xianzhi ^[4]; Zhou, Xuelian ^[3]; Fang, Guigan ^[5]; ^[6]

Jiangsu Province Key Lab. of Biomass Energy and Materials, Nanjing (China); Nanjing Forestry Univ. (China); Univ. of Tennessee, Knoxville, TN (United States)
Jiangsu Province Key Lab. of Biomass Energy and Materials, Nanjing (China)
Nanjing Forestry Univ. (China)
Univ. of Tennessee, Knoxville, TN (United States)
Jiangsu Province Key Lab. of Biomass Energy and Materials, Nanjing (China); Nanjing Forestry Univ. (China)
Univ. of Tennessee, Knoxville, TN (United States); The Univ. of Tennessee Inst. of Agriculture, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this work, we established a novel deep eutectic solvent (DES) using lignin-derived guaiacol as hydrogen bond donor (HBD). The sole ChCl/guaiacol system was found to be inefficient for the fractionation of wheat straw (WS), while the incorporation of trace AlCl₃ significantly facilitated the degradation of hemicellulose and lignin, resulting in a complete enzymatic digestibility of the pretreated WS. Further, this study revealed that the DES-degraded lignin was readily precipitated during the washing process, and thus hindered the enzymatic hydrolysis of poplar and bamboo (with hydrolysis yield of 42.03% and 71.67%, respectively). Alkali washing offers a possible approach to remove the precipitated lignin, after which a near 100% hydrolysis yield was also obtained for poplar and bamboo.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: China Postdoctoral Science Foundation; National Natural Science Foundation of China for Youth; USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1769227

Journal Information:: Bioresource Technology, Journal Name: Bioresource Technology Vol. 326; ISSN 0960-8524

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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