Deep Eutectic Solvent Extraction of High‐Purity Lignin from a Corn Stover Hydrolysate

Dylan Cronin, Xiaowen Chen, Lalehvash Moghaddam, Xiao Zhang

Research output: Contribution to journalArticlepeer-review

46 Scopus Citations

Abstract

A lactic acid/chlorine chloride-based deep eutectic solvent (DES) was used for the extraction of high-purity lignin (up to 94.7 %) in high yield (up to 75 %) from the hydrolysis/fermentation residue corn stover hydrolysate (CSH), which was generated from a pilot-plant-scale biorefinery. A range of extraction conditions were investigated, which involved varying reaction temperature, time, and DES composition. The relationship between lignin yield, purity, and structural characteristics with DES treatment conditions was determined. The extraction of high-purity lignin from hydrolysis/fermentation residues presents a promising approach for enhancing the economic feasibility of a lignocellulose biorefinery. It was also determined that DES extraction can produce lignin with a controlled range of molecular weight and functional group content.

Original languageAmerican English
Pages (from-to)4678-4690
Number of pages13
JournalChemSusChem
Volume13
Issue number17
DOIs
StatePublished - 2020

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

NREL Publication Number

  • NREL/JA-5100-77536

Keywords

  • corn stover
  • deep eutectic solvents
  • depolymerization
  • hydrolysis
  • lignin

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