Optimization of Different Acid-Catalyzed Pretreatments on Co-Production of Xylooligosaccharides and Glucose from Sorghum Stalk

Polymers

Xiaoliu Liu¹  Minglong Zhang²  Yuheng Tao³  Xiaocui Yang⁴  Xinshuai Xu⁵  Hanzhou Yang⁵  Yequan Sheng⁵ 

[1] College of Bioscience and Engineering, Hebei University of Economics and Business, Shijiazhuang 050061, China;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;Department of Bioengineering, School of Pharmacy & School of Medicine, Changzhou University, Changzhou 213164, China;Engineering Training Center, Nanjing Vocational University of Industry Technology, Nanjing 210023, China;Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;

关键词: sorghum stalk;    xylooligosaccharide;    acid hydrolysis;    enzymatic hydrolysis;    glucose;   

DOI  :  10.3390/polym14040830

来源: DOAJ

【 摘 要 】

There is an increasing emphasis on the transformation of lignocellulosic biomass into versatile products. The feasibility of preparing xylooligosaccharides (XOS) by hydrolysis of sorghum stalk (SS) using organic and inorganic acids was studied. The influences of different acids (gluconic acid, acetic acid, sulfuric acid, and oxalic acid), process time and temperature on the hydrolysis of SS were explored. The findings indicated XOS yield can be maintained at a high level under different conditions with organic acid pretreatments. Optimum yield of XOS (39.4%) was obtained using sulfuric acid (pH 2.2) at 170 °C and 75 min of process time. It is suggested when reaction temperature and time were increased, both X5 and X6 are cracked into XOS with lower molecular mass such as X2, X3, and X4. Moreover, the results based on mass balance showed that up to 110 g (XOS) plus 117 g (glucose) can be recovered from 1000 g of SS. Results will give insights into establishing an efficient acid pretreatment of sorghum stalk to coproduction of XOS and glucose.

【 授权许可】

Unknown