A review on the impact of choline chloride-based DES on sugarcane bagasse

Research focus has turned to sustainable and ecologically friendly energy sources due to the growing dependence on nonrenewable fuels. The lignocellulosic biomass’s (LCB) intrinsic recalcitrance makes the bioprocess’s downstream processing difficult. Over the past 20 years, pretreatment procedures have drawn a lot of attention since they are acknowledged as essential operations for effective biomass refining. In order to achieve more sustainable practices, deep eutectic solvents (DESs) are proven to be useful for LCB valorization. DESs are thermochemically stable, recyclable, non-flammable, and contain very little vapor pressure. In the present article, an extensive summarization of the types, characteristics, and functions of DESs in the efficient conversion of sugarcane bagasse is reviewed. In addition to outlining the principles of DES composition, an overview is provided on the factors influencing the ChCl-DES-assisted extraction of the compositional components from sugarcane bagasse. Furthermore, an in-depth insight into the mechanism behind the ChCl-based-DES reactions on sugarcane bagasse will provide useful highlights for future studies. The most recent advancements for the years 2018–2023 on the DES-based valorization of sugarcane bagasse into various products are then thoroughly covered. Finally, the paper is concluded with a discussion of the technical issues and potential directions for the future research works.