典型文献
Insights into depolymerization pathways and mechanism of alkali lignin over a Ni1.2-ZrO2/WO3/γ-Al2O3 catalyst
文献摘要：
This study performed catalytic depolymerization of alkali lignin over Ni-based catalysts.Effects of different promoters(Zr and W),Ni loadings,reaction temperatures,and the addition of formic acid and catalyst on lignin conversion and products distribution were all investigated.The result showed that the highest oil yield(40.1％(mass))was obtained at 240℃over Ni1.2/γ-Al2O3 promoted by Zr and W spe-cies.Quantitative analysis indicates that Zr and W species prefer to lignin depolymerization while Ni active phase prefer to hydrodeoxygenation and hydrogenation.The interconversion of products derived from lignin depolymerization was determined by gas chromatography-mass spectrometer,which demonstrated that phenolic compounds were dominant products in all lignin derived bio-oils,wherein the proportion of vanillin was highest(65.7％)at 180℃,while that of alkyl guaiacols increased with the increase of temperature(from 12.45％at 180℃to 66.67％at 240℃).Residual lignin obtained after lignin depolymerization was also investigated for detecting differences on functional groups,wherein the disappearing peaks at 1511 cm1(stretching of aromatic rings),1267,1215 and 1035 cm-1(vibrations of guaiacyl and syringyl units)were detected by Fourier transform infrared spectrometry.Additionally,the higher O/C ratio measured by elemental analysis also confirmed that alkali lignin was depolymerized effectively under mild conditions.
文献关键词：
中图分类号：
作者姓名：
Xinyu Lu;Dandan Wang;Haoquan Guo;Pengcheng Xiu;Jiajia Chen;Yu Qin;Hossain Mahmud Robin;Chaozhong Xu;Xingguang Zhang;Xiaoli Gu
作者机构：
Co-Innovation Center for Efficient Processing and Utilization of Forest Products,College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,China;Department of Chemistry,School of Science,University of Shanghai for Science and Technology,Shanghai 200093,China
文献出处：
引用格式：
[1]Xinyu Lu;Dandan Wang;Haoquan Guo;Pengcheng Xiu;Jiajia Chen;Yu Qin;Hossain Mahmud Robin;Chaozhong Xu;Xingguang Zhang;Xiaoli Gu-.Insights into depolymerization pathways and mechanism of alkali lignin over a Ni1.2-ZrO2/WO3/γ-Al2O3 catalyst)[J].中国化学工程学报（英文版）,2022(08):191-201
A类：
guaiacols,guaiacyl,syringyl
B类：
Insights,into,depolymerization,pathways,mechanism,alkali,lignin,over,Ni1,ZrO2,WO3,Al2O3,This,study,performed,catalytic,catalysts,Effects,different,promoters,loadings,reaction,temperatures,addition,formic,acid,products,distribution,were,investigated,result,showed,that,highest,yield,mass,was,obtained,promoted,by,Quantitative,analysis,indicates,species,prefer,while,active,phase,hydrodeoxygenation,hydrogenation,interconversion,derived,from,determined,gas,chromatography,spectrometer,which,demonstrated,phenolic,compounds,dominant,bio,oils,wherein,proportion,vanillin,alkyl,increased,Residual,after,also,detecting,differences,functional,groups,disappearing,peaks,cm1,stretching,aromatic,rings,vibrations,units,detected,Fourier,transform,infrared,spectrometry,Additionally,higher,measured,elemental,confirmed,depolymerized,effectively,under,mild,conditions
AB值：
0.540944
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