木质素氧化还原解聚研究现状

发布时间：2019-05-23 07:14

【摘要】：木质素是自然界中含量巨大的天然酚类聚合物,其总量仅次于纤维素。由于其结构复杂性,仅有不到2%的木质素用于工业生产,因此实现木质素的高效综合利用是目前该领域的难题,而木质素的氧化还原转化为芳香化合物是目前一个重要且有前景的手段:木质素氧化解聚能显著降低其主要化学键键能,促进木质素转化为香草醛、紫丁香醛和高香草醛等高度官能化的单体;而木质素还原解聚可将其结构中含氧官能团脱除,转化为低氧/无氧木质素生物油,可作为高热值生物燃油,且在反应中能显著抑制缩合反应的进行。本文简要介绍了木质素的结构单元以及联接方式,同时从反应条件和催化剂等方面全面综述了国内外木质素氧化还原解聚的最新研究进展,并对其反应机理进行了详细探讨。在此基础上,针对当前木质素解聚过程中的难题提出了未来该领域的研究重点和方向。
[Abstract]:Lignin is a natural phenolic polymer with huge content in nature, and its total amount is second only to cellulose. Because of the complexity of its structure, less than 2% of lignin is used in industrial production, so it is a difficult problem in this field to realize the efficient and comprehensive utilization of lignin. The redox conversion of lignin to aromatic compounds is an important and promising means at present: lignin oxygen depolymerization can significantly reduce its main chemical bond energy and promote the conversion of lignin to vanillin. Highly functional monomers such as eugenaldehyde and vanillin; The reductive depolymerization of lignin can remove the oxygen-containing functional groups in its structure and convert it into low oxygen / oxygen-free lignin biooil, which can be used as high calorific value biofuel, and can significantly inhibit the condensation reaction in the reaction. In this paper, the structural units and bonding methods of lignin are briefly introduced. at the same time, the latest research progress of lignin redox depolymerization at home and abroad is reviewed from the aspects of reaction conditions and catalysts, and the reaction mechanism is discussed in detail. On this basis, the future research focus and direction in this field are put forward to solve the problems in the process of lignin depolymerization.
【作者单位】：北京林业大学林木生物质化学北京市重点实验室;
【基金】：中央高校基本科研基金项目(No.2015ZCQ-CL-02) 国家自然科学基金重点项目(No.31430092) 国家林业局公益行业专项面上项目(No.201404617)资助~~
【分类号】：O636.2

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