抑制木质素降解中间体再聚合的研究进展

doi:10.3969/j.issn.0253-2417.2021.04.016

摘要/Abstract

摘要：

木质素的降解往往会伴随其解聚中间体的再聚合，从而增加进一步降解的难度，严重影响木质素的降解率。因此，有效抑制中间体的再聚合是提高木质素降解率的关键。抑制再聚合可以通过改变木质素降解体系的反应路径或者反应环境来达到。主要从抑制或减少木质素再聚合的角度出发，综述了对反应体系添加阻聚剂、缩短反应停留时间和提供温和的反应环境3种有效方法来提高木质素的降解率。

关键词: 木质素, 再聚合, 阻聚剂, 降解率

Abstract:

The degradation of lignin is freguently accompanied by the repolymerization of its intermediates, which increases the difficulty of further degradation and seriously affects the degradation efficiency of lignin. Therefore, effectively inhibiting the repolymerization of intermediates is the key to improve the degradation efficiency of lignin. Inhibiting repolymerization can achieve the purpose of inhibiting polymerization by changing the reaction path or reaction environment of the lignin degradation system. From the perspective of inhibiting or reducing lignin repolymerization, the thesis summarized three effective methods to increase the degradation rate of lignin by adding inhibitors to the reaction system, shortening the reaction residence time and providing a mild reaction environment.

Key words: lignin, repolymerization, inhibitor, degradation efficiency

中图分类号:

TQ35

李梦竹, 王霆. 抑制木质素降解中间体再聚合的研究进展[J]. 林产化学与工业, 2021, 41(4): 124-134.

Mengzhu LI, Ting WANG. Research Progress in Inhibiting Repolymerization of Lignin Degradation Intermediates[J]. Chemistry and Industry of Forest Products, 2021, 41(4): 124-134.

图/表 6

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超临界溶剂 supercritical solvent	催化剂¹⁾ catalyst	条件 conditions	底物 substrate	产品(产量) products(yield)	参考文献 references
甲醇methanol	Cu₂₀La₂₀PMO	310 ℃，6 h	桐树木质素 candlenut lignin	生物油bio-oil (98%)	[13]
	Ag掺杂的Mn₂O₃纳米片 Ag-doped Mn₂O₃ nanosheets	180 ℃，2 h	碱性木质素 alkali lignin	液态乙醇liquid alcohols (42.5%)	[14]
	Fe³⁺，H₂O₂	250 ℃，3 h 6.5 MPa	甜高粱渣木质素 sweet sorghum bagasse lignin	酚醛树脂phenolic oil (75.85%)	[15]
乙醇ethanol	Ru/C，Ni/ZSM-5，CuNiAl	290 ℃，3 h	碱性木质素 alkali lignin	生物油bio-oil (81.8%)	[16]
	WO₃/γ-Al₂O₃	320 ℃，8 h	酶解木质素 enzymatic hydrolysis lignin	烷基酚alkylphenols (86.9%)	[17]
	Ru/C-MgO-ZrO₂	320 ℃，4 h， 3 MPa-H₂	有机溶剂木质素 organosolv lignin	生物油bio-oil (76.2%)，酚类单体phenolic monomer(31.44%)	[18]
丙酮acetone	甲酸 formic acid	300-370 ℃，10 MPa	硬木hardwood, 麦秆木质素 wheat straw lignin	丁香酚syringol (3.6%), 丁香酸syringic acid (2.0%)	[19]

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