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Effect of ascorbic acid assisted dilute acid pretreatment on lignin removal and enzyme digestibility of agricultural residues

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  • Sheng, Yequan
  • Tan, Xin
  • Gu, Yuanjie
  • Zhou, Xin
  • Tu, Maobing
  • Xu, Yong

Abstract

Efficient pretreatment for lignocellulosic biomass is crucial in developing a viable biorefinery process. An ascorbic acid (AsA)-assisted dilute acid pretreatment strategy was developed to improve enzymatic hydrolysis efficiency. In this study, the effect of ascorbic acid addition on the dilute acid pretreatment of wheat straw (WS), corn stover (CS), and corncob (CC) was assessed and compared. The 72 h hydrolysis yield was improved by 12.47, 18.78, and 13.57% in dilute acid pretreated WS, CS, and CC with ascorbic acid addition, respectively. In addition, the cellulose accessibility, enzyme adsorption, chemical composition analysis, and structural features of pretreated biomass with ascorbic acid were determined to better understand its mechanistic effect on enzymatic hydrolysis. The results indicated that the addition of ascorbic acid in the dilute acid pretreatment reduced surface lignin content and enhanced cellulose accessibility, delignification ratio, and enzyme adsorption ability.

Suggested Citation

  • Sheng, Yequan & Tan, Xin & Gu, Yuanjie & Zhou, Xin & Tu, Maobing & Xu, Yong, 2021. "Effect of ascorbic acid assisted dilute acid pretreatment on lignin removal and enzyme digestibility of agricultural residues," Renewable Energy, Elsevier, vol. 163(C), pages 732-739.
    • Handle: RePEc:eee:renene:v:163:y:2021:i:c:p:732-739
    DOI: 10.1016/j.renene.2020.08.135
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    Cited by:

    1. Raj, Tirath & Chandrasekhar, K. & Naresh Kumar, A. & Kim, Sang-Hyoun, 2022. "Lignocellulosic biomass as renewable feedstock for biodegradable and recyclable plastics production: A sustainable approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 158(C).
    2. Zhang, Qilin & Guo, Zongwei & Zeng, Xianhai & Ramarao, Bandaru & Xu, Feng, 2021. "A sustainable biorefinery strategy: Conversion and fractionation in a facile biphasic system towards integrated lignocellulose valorizations," Renewable Energy, Elsevier, vol. 179(C), pages 351-358.
    3. Xie, Xinyu & Song, Kai & Wang, Jing & Hu, Jinguang & Wu, Shufang & Chu, Qiulu, 2024. "Efficient ethanol production from masson pine sawdust by various organosolv pretreatment and modified pre-hydrolysis simultaneous saccharification and fermentation," Renewable Energy, Elsevier, vol. 225(C).
    4. Tong, Wenyao & Chu, Qiulu & Li, Jin & Xie, Xinyu & Wang, Jing & Jin, Yongcan & Wu, Shufang & Hu, Jinguang & Song, Kai, 2022. "Insight into understanding sequential two-stage pretreatment on modifying lignin physiochemical properties and improving holistic utilization of renewable lignocellulose biomass," Renewable Energy, Elsevier, vol. 187(C), pages 123-134.
    5. Nunui, Khanitta & Boonsawang, Piyarat & Chaiprapat, Sumate & Charnnok, Boonya, 2022. "Using organosolv pretreatment with acid wastewater for enhanced fermentable sugar and ethanol production from rubberwood waste," Renewable Energy, Elsevier, vol. 198(C), pages 723-732.

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