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Study on the Solubility of Industrial Lignin in Choline Chloride-Based Deep Eutectic Solvents

Author

Listed:
  • Haiyu Chen

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Ailin Wang

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Cancan Yan

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Shiwei Liu

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Lu Li

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Qiong Wu

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Yue Liu

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Yuxiang Liu

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Genkuo Nie

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

  • Shuangxi Nie

    (Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China)

  • Shuangquan Yao

    (Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China)

  • Hailong Yu

    (State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
    Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China)

Abstract

Deep eutectic solvents (DESs) have emerged as a promising class of solvents for lignin dissolution, which could significantly expand the application potential of lignin. In this study, over forty ChCl-based DESs of three major types were synthesized and subjected to investigate the solubilisation of two industrial lignins in DES. The results showed that higher HBD content, shorter carbon chain length in the HBD, and fewer functional groups favored lignin solubilization. DESs containing carboxyl groups were found to be more favorable for breaking β-O-4 bonds and solubilizing lignin. Additionally, high temperature and appropriate water content were observed to promote lignin solubilization. The pretreatment of poplar and maize straw with ChC/FA(1:3), ChC/LA(1:3), ChC/Gly(1:3), ChC/EG(1:3), ChC/Urea(1:3), and ChC/TEOA(1:3) showed good solubilization of lignin, with ChCl/FA(1:3) being particularly effective in solubilizing poplar lignin and maize straw lignin, achieving lignin solubilization of 82% and 57%, respectively. Overall, these findings suggest that DESs have great potential as solvents for lignin dissolution.

Suggested Citation

  • Haiyu Chen & Ailin Wang & Cancan Yan & Shiwei Liu & Lu Li & Qiong Wu & Yue Liu & Yuxiang Liu & Genkuo Nie & Shuangxi Nie & Shuangquan Yao & Hailong Yu, 2023. "Study on the Solubility of Industrial Lignin in Choline Chloride-Based Deep Eutectic Solvents," Sustainability, MDPI, vol. 15(9), pages 1-16, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:9:p:7118-:d:1131578
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    References listed on IDEAS

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    1. Liu, Ying & Yan, Hanzhao & Liu, Jia & Dong, Wanglai & Cao, Zhi & Hu, Xingbang & Zhou, Zheng, 2020. "Acidic deep eutectic solvents with long carbon chains as catalysts and reaction media for biodiesel production," Renewable Energy, Elsevier, vol. 162(C), pages 1842-1853.
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    Cited by:

    1. Veronika Jančíková & Michal Jablonský, 2024. "Exploiting Deep Eutectic Solvent-like Mixtures for Fractionation Biomass, and the Mechanism Removal of Lignin: A Review," Sustainability, MDPI, vol. 16(2), pages 1-22, January.

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