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绿液预处理过程中杨木木质素结构的变化(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年06期
Page:
93-98
Column:
研究论文
publishdate:
2014-12-09

Article Info:/Info

Title:
Structural changes of poplar lignin in the process of green liquor pretreatment
Article ID:
1000-2006(2014)06-0093-06
Author(s):
MENG Xin WU Wenjuan JIN Yongcan*
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China
Keywords:
poplar wood green liquor pretreatment lignin alkaline nitrobenzene oxidation
Classification number :
TS743.14
DOI:
10.3969/j.issn.1000-2006.2014.06.018
Document Code:
A
Abstract:
Green liquor(Na2S and Na2CO3)was used as a pretreating regent for poplar wood, and the effects of green liquor pretreatment on lignin removal, and lignin structure were investigated in this paper. The residual lignin in the pretreated poplar was characterized by alkaline nitrobenzene oxidation(NBO). The results showed that the total NBO products yield of poplar lignin was 2.61 mmol/g, and the molar ratio of n(S+SA)/n(V+VA)in non-condensed lignin was 2.0. With the increasing of TTA charge and H-factor of green liquor pretreatment, lignin was effectively removed, and the yields of total NBO products, and the molar ratio of n(S+SA)/n(V+VA)decreased. The condensation degree of residual lignin in pretreated solid increased with the lignin removal, and the syringyl lignin was more degradable as compared to guaiacyl type in green liquor pretreatment.

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Last Update: 2014-12-31