Beijing Key Laboratory of Lignocellulosic Chemistry, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
College of Forestry, Northwest A&F University, Yangling 712100, China.
Food Chem. 2014 Aug 1;156:7-13. doi: 10.1016/j.foodchem.2014.01.112. Epub 2014 Feb 6.
Hemicelluloses from sugarcane bagasse were subjected to microwave-assisted acid hydrolysis at mild temperature to produce xylooligosaccharides (XOS). The hydrolysis was performed with dilute H2SO4 at 90°C and the influence of acid concentration (0.1-0.3M) and reaction time (20-40min) on the XOS production was ascertained with response surface methodology based on central composite design. The fitted models of XOS and xylose yields were in good agreement with the experimental results. Compared to hydrolysis time, acid concentration was a more significant coefficient in the production of XOS. A well-defined degree of polymerisation of XOS and the monomer in the hydrolysates were quantified. No sugar-degraded byproduct was detected. The maximum XOS yield of 290.2mgg(-1) was achieved by hydrolysis with 0.24M H2SO4 for 31min. The results indicated that the yields of xylose and the byproducts can be controlled by the acid concentration and reaction time in microwave-assisted acid hydrolysis.
甘蔗渣中的半纤维素经微波辅助酸水解在温和的温度下产生木低聚糖（XOS）。水解在 90°C 下用稀 H2SO4 进行，并通过基于中心复合设计的响应面法确定酸浓度（0.1-0.3M）和反应时间（20-40min）对 XOS 产率的影响。XOS 和木糖产率的拟合模型与实验结果吻合良好。与水解时间相比，酸浓度是 XOS 生产中更重要的系数。定量分析了水解产物中 XOS 和单体的聚合度。未检测到糖降解副产物。用 0.24M H2SO4 水解 31 分钟可获得最大的 290.2mgg(-1)XOS 产率。结果表明，酸浓度和反应时间可以控制微波辅助酸水解中木糖和副产物的产率。
