The cornerstone of realizing lignin value-addition: Exploiting the native structure and properties of lignin by extraction methods
The cornerstone of realizing lignin value-addition: Exploiting the native structure and properties of lignin by extraction methods
复制标题
实现木质素增值的基石：通过提取方法开发木质素的天然结构和性质
DOI：
10.1016/j.cej.2020.126237
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发表时间：
2020-12-15
影响因子：
15.1
通讯作者：
Zhang, Qing
中科院分区：
文献类型：
--
作者：
Huang, Danlian;Li, Ruijin;Zhang, Qing
纤维素、半纤维素和木质素之间复杂的交织结构以及木质素本身的独特性质限制了木质素的增值利用。木质素分离技术作为生物炼制的“上游”工艺，对木质素转化为高价值材料至关重要。然而，从生物质原料中提取结构相对完整而不影响性能的木质素并不容易。值得注意的是，大多数关于木质素的综述集中在其降解方面。提取或分离方法没有详细介绍，这些方法对原料或木质素的影响也没有报道。本文综述了近年来几种温和的有机溶剂萃取方法和新型离子液体对木质素理化性质和结构的影响。并对这些木质素的应用及潜在的经济效益进行了综述。这些方法促进了木质素的有效利用，不再局限于热能，也解决了木质素作为废物流所带来的固体废物处理问题。最后对木质素的分离、解聚及应用前景进行了展望。为生物炼油技术的发展提供参考。
The complex interlacing structure among cellulose, hemicellulose and lignin and the unique properties of lignin itself limit the value-added utilization of the lignin. As the "upstream" process of biorefinery, lignin separation technology is very important for lignin conversion into high-value materials. However, it is not easy to extract lignin with relatively complete structure without affecting performance from biomass raw materials. Notably, most of reviews regarding lignin focus on its degradation. The extraction or separation methods are not introduced in detail, and the effects of these methods on raw materials or lignin have not been reported. Herein, this paper critically reviews the changes in physicochemical properties and structure of lignin caused by several mild organic solvent extraction methods and new ionic liquids which has been widely used in recent years. Furthermore, the application and potential economic benefits of these lignin are summarized. These methods promote the effective utilization of lignin, which is no longer limited to heat energy, but also alleviates the solid waste disposal problem caused by lignin as waste stream. Finally, perspectives on the future research on the lignin separation, depolymerization and application are highlighted. This review may provide an insight for the development of bio-refining technology.