Lignocellulose pretreatment by deep eutectic solvents and related technologies: A review

Lignocellulose is the main component of plants and has a wide range of sources. The high-value production of lignocellulose lies in the biorefinery of lignin, cellulose and hemicellulose. The ad-vantages and disadvantages of traditional lignocellulose pretreatment methods were summarized, and the effective pretreatment parameters were listed. As a green solvent system with excellent performance, deep eutectic solvents (DES) are considered to be the most potential biomass pre-treatment system. Based on this, the new trend and progress of DES in lignocellulose pretreatment were reviewed, focusing on the effects of distinct kinds of lignocellulose raw materials, distinct components of DES, distinct reaction conditions and assisted by microwave ultrasound on the pre-treatment of lignocellulose, and the recyclability of DES solution system was discussed. Finally, the application and development direction of DES in lignocellulose pretreatment are proposed and prospected.

Automated summary

This paper summarizes the advantages and disadvantages of traditional lignocellulose pretreatment methods and lists effective pretreatment parameters. Deep eutectic solvents (DES), as a green solvent system with excellent performance, are considered the most potential biomass pretreatment system. Based on this, the new trends and progress of DES in lignocellulose pretreatment are reviewed, focusing on the effects of different types of lignocellulosic raw materials, different components of DES, different reaction conditions, and the use of microwave ultrasound. The recyclability of DES solution system is also discussed. Finally, the application and future development direction of DES in lignocellulose pretreatment are proposed and prospected.