4.8 Article

In-depth investigation of formic acid pretreatment for various biomasses: Chemical properties, structural features, and enzymatic hydrolysis

Journal

BIORESOURCE TECHNOLOGY
Volume 374, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2023.128747

Keywords

Formic acid pretreatment; Biomass; Physical -chemical properties; Enzymatic hydrolysis

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Formic acid pretreatment is a promising method for biomass fractionation due to its efficient recycling and removal of hemicellulose and lignin. This study investigated the influence of formic acid pretreatment on woody and herbaceous biomasses, revealing that herbaceous biomass had higher xylan and lignin removal than woody biomass. The study also demonstrated that formic acid pretreatment improved enzymatic efficiency for both herbaceous and poplar biomasses.
Formic acid pretreatment is a promising approach for fractionating biomass, and it has the advantages of efficient recycling and removal of hemicellulose and lignin. Biomass is one of the most plentiful resources on earth, yet its chemical structure differs significantly between woody and herbaceous biomass. The influence of formic acid pretreatment on the fractionation of woody and herbaceous biomasses, as well as changes in physical-chemical properties, was investigated in this study. The results indicated that formic acid is universal in the biorefinery of different biomass, however, herbaceous biomass had greater xylan and lignin removal than woody biomass (especially softwood). Formic acid pretreatment not only considerably improved the enzymatic efficiency of herbaceous biomass, but also had a good effect on the enzymatic efficiency of poplar. This study also found that the correlation between residual xylan content and enzymatic efficiency after pretreatment was much higher than that of lignin content.

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