Depolymerization of Organosolv Lignin over Silica-alumina Catalysts  

硅铝催化剂催化有机溶剂木质素的解聚

作　　者：吴青云[1] 马隆龙[1,2] 龙金星[2] 舒日洋 张琦[2] 王铁军[2] 徐莹[2] 吴青云;马隆龙;龙金星;舒日洋;张琦;王铁军;徐莹(中国科学技术大学化学与材料科学学院,合肥230026;中国科学院广州能源研究所,广州510640;中国科学院大学,北京100049)

机构地区：[1]中国科学技术大学化学与材料科学学院,合肥230026 [2]中国科学院广州能源研究所,广州510640 [3]中国科学院大学,北京100049

出　　处：《Chinese Journal of Chemical Physics》2016年第4期474-480,I0002,共8页化学物理学报（英文）

摘　　要：Efficient conversion of lignin to fine chemicals and biofuel become more and more attractive in biorefinery. In this work, we used a series of silica-alumina catalysts （i.e., SiO2-Al2O3, HY, Hβ, and HZSM-5） to degrade lignin into arenes and phenols. The relationship between the catalyst structure and lignin depolymerization performance was investigated. The results showed that both acidity and pore size of the catalyst could influence the conversion of lignin. In the volatilizable product, phenols were identified as the main phenolic monomers via gas chromatography-mass spectrometer. SIO2-Al2O3 was the most efficient catalyst, giving 90.96% degree of conversion, 12.91% yield of phenols, and 2.41% yield of arenes in ethanol at 280℃ for 4 h. The Fourier transform infrared spectroscopy and ^1H nuclear magnetic resonance spectroscopy analysis demonstrated that deoxygenation and alkylation occurred in this process. The effect of solvents was also investigated and the results showed that ethanol was the most efficient solvent.

关 键 词：Lignin SIO2-AL2O3 PHENOLS DEOXYGENATION ALKYLATION 

分 类 号：O4[理学—物理]