Aliphatic extractive effects on acetic acid catalysis of typical agricultural residues to xylo-oligosaccharide and enzymatic hydrolyzability of cellulose

Biotechnology for Biofuels

Junhua Zhang¹  Yong Xu²  Kaixuan Huang²  Jianming Guo²  Rou Cao² 

[1] College of Forestry, Northwest A&F University, 3 Taicheng Road, Yangling, 712100, Shanxi, People’s Republic of China;Key Laboratory of Forestry Genetics & Biotechnology, Ministry of Education, College of Chemical Engineering, Nanjing Forestry University, 210037, Nanjing, People’s Republic of China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, 210037, Nanjing, People’s Republic of China;Jiangsu Province Key Laboratory of Green Biomass-Based Fuels and Chemicals, 210037, Nanjing, People’s Republic of China;

关键词: Aliphatic extractives;    Acetic acid acidolysis;    Xylo-oligosaccharides;    Enzymatic hydrolysis;    Agricultural residues;   

DOI  :  10.1186/s13068-021-01952-8

来源: Springer

【 摘 要 】

BackgroundXylo-oligosaccharide is the spotlight of functional sugar that improves the economic benefits of lignocellulose biorefinery. Acetic acid acidolysis technology provides a promising application for xylo-oligosaccharide commercial production, but it is restricted by the aliphatic (wax-like) compounds, which cover the outer and inner surfaces of plants.ResultsWe removed aliphatic compounds by extraction with two organic solvents. The benzene–ethanol extraction increased the yield of acidolyzed xylo-oligosaccharides of corncob, sugarcane bagasse, wheat straw, and poplar sawdust by 14.79, 21.05, 16.68, and 7.26% while ethanol extraction increased it by 11.88, 17.43, 1.26, and 13.64%, respectively.ConclusionThe single ethanol extraction was safer, more environmentally friendly, and more cost-effective than benzene–ethanol solvent. In short, organic solvent extraction provided a promising auxiliary method for the selective acidolysis of herbaceous xylan to xylo-oligosaccharides, while it had minimal impact on woody poplar.

【 授权许可】

CC BY