首页|5-Sulfosalicylic acid as an acid hydrotrope for the rapid and green fractionation of woody biomass
5-Sulfosalicylic acid as an acid hydrotrope for the rapid and green fractionation of woody biomass
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NSTL
Elsevier
? 2021 Elsevier B.V.This study reported that 5-sulfosalicylic acid (5-SSA), a solid acid with hydrotropic properties, could efficiently and rapidly fractionate poplar biomass in an aqueous solution at mild conditions. The experimental results showed that 5-SSA-treatment could deconstruct the biomass recalcitrant intercellular structure and has excellent potential in lignin and hemicellulose dissolution and glucose release through subsequent enzymatic hydrolysis. Under the optimum conditions (80 wt% aqueous 5-SSA solution, 110 °C, and 60 min), a lignin removal rate of approximately 69.97%, cellulose recovery yield of more than 80.18% saccharification yield of 76.1% were achieved. 5-SSA acted as a catalyst to depolymerize lignin and hemicellulose by cleaving ether bonds and served as a solvent to dissolve lignin macromolecules by forming 5-SSA clusters and aggregates in water during fractionation. Density functional theory (DFT) indicated that strong H-bonding interactions between 5-SSA and lignin fragments contributed to the breakage of H-bonding network between lignin fragments.
Institute of Chemical Industry of Forest Products Chinese Academy of Forestry Key Lab. of Biomass Energy and Material Jiangsu Province National Engineering Lab. for Biomass Chemical Utilization Key and Open Lab. on Forest Chemical Engineering SFA
United States Department of Agriculture (USDA) Forest Service Southern Research Station
NSTL
Elsevier
