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Derived high reducing sugar and lignin colloid particles from corn stover.

Wei Liu1, Shengnan Zhuo2,3,4, Mengying Si5,6

  • 1School of Life Science, Tonghua Normal University, Tonghua, 134000, China.

BMC Chemistry
|December 11, 2020
PubMed
Summary

This study used tetrahydrofuran-water pretreatment of corn stover to boost reducing sugar yields for biofuels and create tunable lignin colloid particles (LCPs) for biomaterials.

Keywords:
Corn stoverLigninLignin colloid particlesReducing sugarTHF–H2O pretreatment

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Area of Science:

  • Biomass Conversion and Biorefining
  • Materials Science
  • Sustainable Energy

Background:

  • Lignocellulosic biomass is a key resource for biofuels and biomaterials.
  • Efficient cellulose conversion and lignin utilization remain significant challenges in biorefineries.
  • Developing integrated processes for both sugar and lignin valorization is crucial for sustainability.

Purpose of the Study:

  • To investigate the use of tetrahydrofuran-water (THF-H2O) pretreatment for corn stover (CS).
  • To achieve high reducing sugar yields and simultaneously produce lignin colloid particles (LCPs) of varying sizes.
  • To understand the factors influencing LCP formation and size for optimized biorefinery design.

Main Methods:

  • Corn stover pretreatment using a THF-H2O co-solvent system.
  • Optimization of pretreatment conditions (temperature, time, solvent ratio) for sugar yield and LCP characteristics.
  • Analysis of lignin structure, concentration, and syringyl/guaiacyl (S/G) ratio to correlate with LCP size.

Main Results:

  • THF-H2O pretreatment significantly increased reducing sugar yield by 6.66-fold compared to untreated CS.
  • Spherical LCPs ranging from 202 to 732 nm were formed via self-assembly from the pretreatment liquor.
  • Optimal conditions (120 °C, 2 h) yielded 588.4 mg/g reducing sugar and 243 nm LCPs.
  • LCP size was positively correlated with lignin concentration and S/G ratio.

Conclusions:

  • THF-H2O pretreatment offers an effective method for simultaneous high reducing sugar production and tunable LCP generation from corn stover.
  • Lignin characteristics, specifically concentration and S/G ratio, dictate LCP size and morphology.
  • This approach provides a novel strategy for integrated lignocellulosic biomass conversion and valorization.