Evaluation of chemical processing impact on E. globulus wood lignin and comparison with bark lignin

被引:38
|
作者
Esteves Costa, Carina A. [1 ]
Rodrigues Pinto, Paula Cristina [1 ]
Rodrigues, Alirio Egidio [1 ]
机构
[1] Univ Porto, LSRE, Associate Lab LSRE LCM, Dept Chem Engn,Fac Engn, P-4200465 Oporto, Portugal
关键词
Eucalyptus globulus lignins; Kraft; Organosolv; Mild acidolysis; Wood; Bark; Structural characterization; NMR; NUCLEAR-MAGNETIC-RESONANCE; STRUCTURAL-CHARACTERIZATION; ORGANOSOLV PRETREATMENT; NMR; OXIDATION; EXTRACTION; ETHANOL; FRACTIONATION; CONDENSATION; OPTIMIZATION;
D O I
10.1016/j.indcrop.2014.07.045
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
In this work a comprehensive characterization of different Eucalyptus globulus lignins was performed in order to evaluate the influence of the industrial process on its structure: LOrg - lignin produced by organosolv process, LKraft - lignin isolated from black liquor (obtained by kraft process) and further purified, taking LEg(wood) - lignin produced by wood mild acidolysis, as representative of wood lignin. Lignin from bark, LEg(bark), also isolated by mild acidolysis, was characterized and compared with LEg(wood). Besides the contaminants content (inorganic material plus carbohydrates - 1-3%), lignins structure were studied with reference to yields obtained by nitrobenzene oxidation (NO), and with reference to functional groups and typical structures/linkages by quantitative C-13, H-1 and P-31 nuclear magnetic resonance (NMR). NO yield order was found to be LKraft (21%) < LOrg (26%) < LEg(wood) (31%) approximate to LEg(bark) (33%), demonstrating that the industrial processing, particularly the kraft one, induced unfavorable changes for a valorization route involving production of functionalized aldehydes by depolymerization. The main changes were the increase of degree of condensation (DC), cleavage of beta-aryl ether linkages, and demethoxylation, in particular for the lignin resulting from the kraft process. The NO yield was successful correlated with DC and Syringyl/Guaiacyl (S/G) ratio from 31P NMR and also a good correlation was obtained between beta-aryl ether content and DC, clearly ascertaining the structural features related with the potential of the E. globulus lignin as source of functionalized aldehydes. LEg(wood) and LEg(bark) have similar structures, whilst the presence of p-hydroxyphenyl (H) detected in the bark lignin leads to a S:G:H (73:23:4) different from wood lignin (80:20:0). The overall results showed that organosolv or a mild delignification process would be a preferable process to obtain lignin from E. globulus wood or bark for production of functionalized aldehydes. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:479 / 491
页数:13
相关论文
共 50 条
  • [41] Structural Features of Alkaline Dioxane Lignin and Residual Lignin from Eucalyptus grandis x E. urophylla
    Chen, Wei-Jing
    Zhao, Bao-Cheng
    Cao, Xue-Fei
    Yuan, Tong-Qi
    Shi, Quentin
    Wang, Shuang-Fei
    Sun, Run-Cang
    JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2019, 67 (03) : 968 - 974
  • [42] A Comparison among Lignin Modification Methods on the Properties of Lignin-Phenol-Formaldehyde Resin as Wood Adhesive
    Younesi-Kordkheili, Hamed
    Pizzi, Antonio
    POLYMERS, 2021, 13 (20)
  • [43] Chemical Alterations of Pine Wood Lignin during Heat Sterilization
    Kacik, Frantisek
    Luptakova, Jana
    Smira, Pavel
    Nasswettrova, Andrea
    Kacikova, Danica
    Vacek, Vladimir
    BIORESOURCES, 2016, 11 (02): : 3442 - 3452
  • [44] WOOD-CHEMICAL VIEWPOINTS OF LIGNIN-CONTAINING BLEACHING
    GIERER, J
    PAPIER, 1968, 22 (07): : 411 - &
  • [45] On the importance of lignin-carbohydrate complexes in wood and chemical pulps
    Gellerstedt, Goran
    Research Progress in Pulping and Papermaking, 2006, 2006, : 7 - 10
  • [46] Comparison of the pyrolysis behavior of pyrolytic lignin and milled wood lignin by using TG-FTIR analysis
    Wang, Shurong
    Lin, Haizhou
    Ru, Bin
    Sun, Wuxing
    Wang, Yurong
    Luo, Zhongyang
    JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2014, 108 : 78 - 85
  • [47] STUDIES ON THE CHEMICAL NATURE OF MILLED WOOD LIGNIN OF JUTE STICK
    ROY, AK
    BAG, SC
    SEN, SK
    CELLULOSE CHEMISTRY AND TECHNOLOGY, 1987, 21 (04): : 343 - 348
  • [48] Chemical structural elucidation of total lignins in woods I: fractionation of the lignin in residual wood meal after extraction of milled wood lignin
    Shuichi Hirosawa
    Rui Katahira
    Fumiaki Nakatsubo
    Journal of Wood Science, 2002, 48 : 46 - 50
  • [49] EVALUATION OF CHEMICAL COMPOSITION AND LIGNIN STRUCTURAL FEATURES OF SIMAROUBA VERSICOLOR WOOD ON ITS PULPING PERFORMANCE
    Silva, Teresa Cristina F.
    Gomide, Jose Livio
    Santos, Ricardo Balleirini
    BIORESOURCES, 2012, 7 (03): : 3910 - 3920
  • [50] Elucidation of LCC bonding sites via γ-TTSA lignin degradation: crude milled wood lignin (MWL) from Eucalyptus globulus for enrichment of lignin xylan linkages and their HSQC-NMR characterization
    Ando, Daisuke
    Nakatsubo, Fumiaki
    Takano, Toshiyuki
    Yano, Hiroyuki
    HOLZFORSCHUNG, 2016, 70 (06) : 489 - 494