硫酸铝辅助稀硫酸选择性去除半纤维素
Selective Removal of Hemicellulose by Diluted Sulfuric Acid Assisted by Aluminum Sulfate.
作者信息
Jiang Huabin, Nie Jiaqi, Zeng Lei, Zhu Fei, Gao Zhongwang, Zhang Aiping, Xie Jun, Chen Yong
机构信息
Institute of Biomass Engineering, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Engineering Technology Research Center of Agricultural and Forestry Biomass, South China Agricultural University, Guangzhou 510642, China.
College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
出版信息
Molecules. 2024 Apr 28;29(9):2027. doi: 10.3390/molecules29092027.
Hemicellulose can be selectively removed by acid pretreatment. In this study, selective removal of hemicellulose was achieved using dilute sulfuric acid assisted by aluminum sulfate pretreatment. The optimal pretreatment conditions were 160 °C, 1.5 wt% aluminum sulfate, 0.7 wt% dilute sulfuric acid, and 40 min. A component analysis showed that the removal rate of hemicellulose and lignin reached 98.05% and 9.01%, respectively, which indicated that hemicellulose was removed with high selectivity by dilute sulfuric acid assisted by aluminum sulfate pretreatment. Structural characterizations (SEM, FTIR, BET, TGA, and XRD) showed that pretreatment changed the roughness, crystallinity, pore size, and functional groups of corn straw, which was beneficial to improve the efficiency of enzymatic hydrolysis. This study provides a new approach for the high-selectivity separation of hemicellulose, thereby offering novel insights for its subsequent high-value utilization.
半纤维素可通过酸预处理选择性去除。在本研究中，使用硫酸铝预处理辅助的稀硫酸实现了半纤维素的选择性去除。最佳预处理条件为160℃、1.5 wt%硫酸铝、0.7 wt%稀硫酸和40分钟。成分分析表明，半纤维素和木质素的去除率分别达到98.05%和9.01%，这表明通过硫酸铝预处理辅助的稀硫酸可高选择性地去除半纤维素。结构表征（扫描电子显微镜、傅里叶变换红外光谱、比表面积分析仪、热重分析仪和X射线衍射仪）表明，预处理改变了玉米秸秆的粗糙度、结晶度、孔径和官能团，这有利于提高酶解效率。本研究为半纤维素的高选择性分离提供了一种新方法，从而为其后续高值利用提供了新的见解。
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