Catalytic hydrogenolysis of organosolv lignin: Cleaving C–O bonds over CuMgAlO_(x)-layered porous metal oxide catalysts for oriented monophenols production  

作　　者：Juping Liu Yang Yang Ziyue Tang Yingquan Chen Hanping Chen Xianhua Wang Haiping Yang 

机构地区：[1]State Key Laboratory of Coal Combustion Huazhong University of Science and Technology,Wuhan,Hubei 430074,China

出　　处：《Green Carbon》2024年第2期211-220,共10页绿碳（英文）

基　　金：supported by the National Natural Science Fund for Distinguished Young Scholars(52125601).

摘　　要：To understand the catalytic conversion of lignin into high-value products,lignin depolymerization was performed using a layered polymetallic oxide(CuMgAlO_(x))catalyst.The effects of the conversion temperature,hydrogen pressure,and reaction time were studied,and the ability of CuMgAlO_(x)to break the C–O bond was evaluated.The CuMgAlO_(x)(Mg/Al=3:1)catalyst contained acidic sites and had a relatively homogeneous elemental distribution with a high pore size and specific surface area.Theβ-O-4 was almost completely converted by disassociating the C–O bond,resulting in yields of 14.74%ethylbenzene,47.58%α-methylphenyl ethanol,and 36.43%phenol.The highest yield of lignin-derived monophenols was 85.16%under reaction conditions of 280℃ and 3 Mpa for 4 h.As the reaction progressed,depolymerization and condensation reactions occurred simultaneously.Higher temperatures(>280℃)and pressures(>3 Mpa)tended to produce solid char.This study establishes guidelines for the high-value application of industrial lignin in the catalytic conversion of polymetallic oxides.

关 键 词：LIGNIN Catalytic depolymerization Monophenols CuMgAlO_(x) Layered polymetallic oxide catalyst 

分 类 号：O64[理学—物理化学]