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A green pretreatment approach of corn stalk wastes for obtaining micro/nano-cellulose fibers, monosaccharides and lignin fractions

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  • Yang, Shibo
  • Chen, Keli
  • Zhu, Zhengliang
  • Guan, Qingqing
  • Zhou, Huajing
  • He, Liang

Abstract

Efficient separation of carbohydrates and lignin from lignocellulosic biomass, and further high-value conversion are still the main challenge of biorefinery. Oxygen-enhanced alkali treatment as a green method for separating polysaccharides and lignin from gramineous materials with environmental, economic and low energy consumption. Herein, oxygen-enhanced alkali technology was used to pretreatment corn stalk pith, and then realize high-value transformation. The results showed that oxygen-enhanced alkali treatment combined with acid precipitation, ethanol precipitation, enzymatic hydrolysis or ultrasonic can achieve clean, efficient separation and subsequent high-value transformation of various components of corn pith. The enzymatic efficiencies of solid and liquid polysaccharides were 75.42% and 50.52% respectively, and the structure of micro/nano-cellulose fiber is mostly flaky and granular. In addition, the separated lignin contains many small molecular compounds, which has the potential value of further utilization. In this study, oxygen-enhanced alkali treatment can achieve clean, efficient separation and subsequent high-value transformation of various components in corn stalk or lignocellulosic biomass, which has important practical significance.

Suggested Citation

  • Yang, Shibo & Chen, Keli & Zhu, Zhengliang & Guan, Qingqing & Zhou, Huajing & He, Liang, 2022. "A green pretreatment approach of corn stalk wastes for obtaining micro/nano-cellulose fibers, monosaccharides and lignin fractions," Renewable Energy, Elsevier, vol. 194(C), pages 746-759.
    • Handle: RePEc:eee:renene:v:194:y:2022:i:c:p:746-759
    DOI: 10.1016/j.renene.2022.05.137
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    References listed on IDEAS

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    1. Pin, Thaynara C. & Nascimento, Viviane M. & Costa, Aline C. & Pu, Yunqiao & Ragauskas, Arthur J. & Rabelo, Sarita C., 2020. "Structural characterization of sugarcane lignins extracted from different protic ionic liquid pretreatments," Renewable Energy, Elsevier, vol. 161(C), pages 579-592.
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    Cited by:

    1. Pant, Manish & Pant, Tanuja, 2023. "Maximising biotransformation of pine needles to microbial lipids using Lipomyces starkeyi MTCC 1400T," Renewable Energy, Elsevier, vol. 206(C), pages 574-581.

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