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Combination of microwave with acid deep eutectic solvent pretreatment for reed (Phragmites australis) fractionation

Author

Listed:
  • Xia, Qiuli
  • Zhang, Lin
  • Zhan, Peng
  • Tong, Zhaohui
  • Qing, Yan
  • He, Jiaying
  • Wu, Zhiping
  • Wang, Hui
  • Shao, Lishu
  • Liu, Na

Abstract

The cost-effective and low-carbon fractionation of lignocellulosic biomass will enhance the economic viability of bio-refining. To achieve efficient reed fractionation under favorable conditions, microwave-assisted choline chloride and p-toluene sulfonic acid (M-ChCl/p-TsOH) pretreatment was employed. The fractionation of reed components demonstrated higher effectiveness with M-ChCl/p-TsOH pretreatment compared to conventional DES pretreatment. Under M-ChCl/p-TsOH conditions, a high hemicellulose removal rate (∼90%) and delignification rate (∼65%) were achieved while achieving a saccharification rate of 88% during cellulase hydrolysis. Microwave assistance not only significantly reduced reaction time to less than 60 s but also enhanced the pretreatment efficacy. Furthermore, the obtained lignin products consisted of low-polymerization lignin (MW < 800 g/mol) and acid-soluble lignin, providing a solid foundation for subsequent high-value utilization of lignin. This study provides a promising strategy for the low carbon fractionation of reed using DES, aiming to simultaneously achieve efficient cellulose hydrolysis and obtain tractable lignin.

Suggested Citation

  • Xia, Qiuli & Zhang, Lin & Zhan, Peng & Tong, Zhaohui & Qing, Yan & He, Jiaying & Wu, Zhiping & Wang, Hui & Shao, Lishu & Liu, Na, 2024. "Combination of microwave with acid deep eutectic solvent pretreatment for reed (Phragmites australis) fractionation," Renewable Energy, Elsevier, vol. 225(C).
    • Handle: RePEc:eee:renene:v:225:y:2024:i:c:s0960148124003513
    DOI: 10.1016/j.renene.2024.120286
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