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Depolymerization of Organosolv Lignin over Silica-alumina Catalysts
Qing-yun Wu,Long-long Ma,Jin-xing Long,Ri-yang Shu,Qi Zhang,Tie-jun Wang,Ying Xu
Author NameAffiliationE-mail
Qing-yun Wu Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China  
Long-long Ma Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China  
Jin-xing Long Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China  
Ri-yang Shu Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;University of Chinese Academy of Sciences, Beijing 100049, China  
Qi Zhang Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China  
Tie-jun Wang Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China  
Ying Xu Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China xuying@ms.giec.ac.cn 
Abstract:
E cient 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 in uence 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 effcient 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 effcient solvent.
Key words:  Lignin  SiO2-Al2O3  Phenols  Deoxygenation  Alkylation
FundProject:This work was supported by the National Key Technology R&D Program (No.2014BAD02B01) and the National Natural Science Foundation of China (No.51476178).
硅铝催化剂催化有机溶剂木质素的解聚
吴青云,马隆龙,龙金星,舒日洋,张琦,王铁军,徐莹
摘要:
使用一系列的硅铝催化剂(SiO2-Al2O3,HY,Hβ和HZSM-5)催化解聚木质素转化为芳香烃和苯酚类化合物. 研究了催化剂结构和其解聚木质素性能之间的关系. 结果表明催化剂的酸性和孔道尺寸都会影响木质素解聚. 经气相色谱质谱联用检测,发现产物中含量最主要的酚类产物是苯酚类化合物. SiO2-Al2O3是效果最好的催化剂,以它为催化剂时木质素转化率为90.96%,芳香烃和苯酚类产物的收率分别为2.41%和12.91%. 产物的红外吸收光谱和核磁共振氢谱的分析也表明反应过程中发生了脱氧和烷基化反应. 最后也对溶剂对反应的影响进行了研究,发现乙醇是最佳的反应溶剂.
关键词:  木质素  SiO2-Al2O3  苯酚类化合物  脱氧反应  烷基化反应
DOI:10.1063/1674-0068/29/cjcp1601017
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