Abstract

Demonstrated to be highly effective for lignocellulosic biomass pretreatment, deep eutectic solvent (DES) has attracted increasing attention owing to its advantages of simple synthesis, relatively low chemical cost, and better biocompatibility as compared to certain ionic liquids. Here we provide a critical review of the status of the design/selection of DES for the pretreatment of biomass feedstocks with an emphasis on the process intensification strategies: 1) integration of microwave, ultrasound, and high solid extrusion for pretreating biomass, 2) one-pot DES pretreatment, enzymatic hydrolysis, and fermentation, 3) strategies for DES recycling and product recovery; and 4) recent progress on molecular simulations toward understanding the interactions between DES and biomass compounds such as lignin and cellulose. Lastly, we provide perspectives toward cost-effective, continuous, high-solid, environmental-benign, and industrial-relevant applications and point to future research directions to address the challenges associated with DES pretreatment.

Document Type

Article

Publication Date

2-2023

Notes/Citation Information

0960-8524/© 2022 Elsevier Ltd. All rights reserved.

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.biortech.2022.128394

Funding Information

The authors acknowledge US Department of Agriculture, National Institute of Food and Agriculture (under accession number #1015068 and #1018315), and University of Kentucky Igniting Research Collaborations for financial support.

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