Abstract：
The productive separation and conversion of corn straw offers significant prospects for the economic viability of biorefineries centered on straw resources. In this work, a graded utilization method was proposed to produce xylo-oligosaccharides (XOS), ethanol and lignin from corn straw by nicotinic acid (NA) hydrolysis and water/pentanol pretreatment. A XOS yield of 52.6 % was achieved under optimized conditions of 100 mM NA, 170 °C and 30 min. The solid residue was directly treated with water/pentanol, achieving a lignin removal rate of 79.7 %, and the total XOS yield was improved to 62.6 %. The lignin recovered from pentanol had a high purity of 97.6 %, with high phenolic OH content. Simultaneous saccharification and fermentation of final residue resulted in an ethanol yield of 92.0 %, which yielded 55.3 g/L ethanol. Thus, NA hydrolysis and water/pentanol pretreatment provided an efficient, environmentally friendly approach to fractionate corn straw for the co-production of XOS, ethanol, and lignin.
摘要：
玉米秸秆的生产性分离和转化为以秸秆资源为中心的生物炼油厂的经济可行性提供了重要前景。在这项工作中,提出了一种分级利用方法来生产低聚木糖(XOS)，通过烟酸（NA）水解和水/戊醇预处理从玉米秸秆中提取乙醇和木质素。在100mMNA的优化条件下，XOS产率达到52.6%。170°C和30分钟。固体残余物直接用水/戊醇处理,木质素去除率达到79.7%，总XOS产率提高到62.6%。从戊醇中回收的木质素具有97.6%的高纯度,具有高的酚类OH含量。同时糖化和发酵最终残渣的乙醇产率为92.0%，其产生55.3g/L乙醇。因此，NA水解和水/戊醇预处理提供了一种有效的，用于联合生产XOS的玉米秸秆分馏的环保方法，乙醇,和木质素。
