Xue Fengyang, Li Wenzhi, An Shengxin, Li Cunshuo, Li Xu, Wu Mingwei, Wei Xiuzhi
Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China Hefei 230026 PR China.
Institute of Energy, Hefei Comprehensive National Science Center Hefei 230031 China.
RSC Adv. 2021 Apr 14;11(23):14140-14147. doi: 10.1039/d0ra10877d. eCollection 2021 Apr 13.
A highly efficient pretreatment strategy using ethylene glycol with dilute sulfuric acid was developed for the fractionation of lignocellulose. The pretreatment behaviors were related to the composition analysis and structure of the samples analyzed by SEM, XRD, FTIR and 2D HSQC NMR, resulting in 80.3% delignification and 84.7% retention of cellulose under the selected conditions (120 °C, 60 min, and 0.6 wt% HSO (w/w)). The enzymatic hydrolysis sugar yield significantly increased from 24.1 to 70.6% (3 FPU g), which displayed immense improvement compared with untreated corn stover (24.1%), nearly 3-fold higher than its untreated counterparts. Besides, the regenerated lignin could be fitted to valorize renewable aromatic chemicals and alkane fuels. The present study shows that the pretreatment is a simple, efficient and promising process for corn stover biorefinery.
开发了一种使用乙二醇和稀硫酸的高效预处理策略用于木质纤维素的分级分离。预处理行为与通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和二维异核单量子相干核磁共振（2D HSQC NMR）分析的样品组成和结构相关，在选定条件（120℃、60分钟和0.6重量%硫酸（w/w））下实现了80.3%的脱木质素率和84.7%的纤维素保留率。酶解糖产率从24.1%显著提高到70.6%（3 FPU/g），与未处理的玉米秸秆（24.1%）相比有巨大改善，比未处理的同类样品高出近3倍。此外，再生木质素可用于增值可再生芳香化学品和烷烃燃料。本研究表明，该预处理对于玉米秸秆生物炼制是一个简单、高效且有前景的过程。
