Efficient conversion of lignin to alkylphenols over highly stable inverse spinel MnFe_(2)O_(4) catalysts  

作　　者：Yi Qi Xuezhi Zeng Lingyingzi Xiong Xuliang Lin Bowen Liu Yanlin Qin 

机构地区：[1]Guangdong Provincial Key Laboratory of Plant Resources Biorefinery,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第8期1085-1095,共11页化学科学与工程前沿（英文版）

基　　金：We gratefully acknowledge the financial supports from the National Natural Science Foundation of China(Grant Nos.22038004 and 22078069).

摘　　要：The aromatic properties of lignin make it a promising source of valuable chemicals and fuels.Developing efficient and stable catalysts to effectively convert lignin into high-value chemicals is challenging.In this work,MnFe_(2)O_(4) spinel catalysts with oxygen-rich vacancies and porous distribution were synthesized by a simple solvothermal process and used to catalyze the depolymerization of lignin in an isopropanol solvent system.The specific surface area was 110.5 m^(2)∙g^(–1),which substantially increased the active sites for lignin depolymerization compared to Fe3O4.The conversion of lignin reached 94%,and the selectivity of alkylphenols exceeded 90% after 5 h at 250℃.Underpinned by characterizations,products,and density functional theory analysis,the results showed that the catalytic performance of MnFe_(2)O_(4) was attributed to the composition of Mn and Fe with strong Mn–O–Fe synergy.In addition,the cycling experiments and characterization showed that the depolymerized lignin on MnFe_(2)O_(4) has excellent cycling stability.Thus,our work provides valuable insights into the mechanism of lignin catalytic depolymerization and paves the way for the industrial-scale application of this process.

关 键 词：lignin depolymerization SPINEL CATALYSTS HYDROGENATION 

分 类 号：O64[理学—物理化学]