Recent progress in microwave-assisted lignin conversion

IF 16.3 1区工程技术 Q1 ENERGY & FUELS

Renewable and Sustainable Energy Reviews Pub Date : 2025-05-19 DOI:10.1016/j.rser.2025.115855

Zhongfan Luo, Danyang Cao, Peng Jiang, Jingjing Chen, Tuo Ji, Han Lin, Xiaohua Lu, Liwen Mu, Jiahua Zhu

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Abstract

Lignin, a complex natural phenolic macromolecule, offers considerable potential in the production of high-value phenolic platform chemicals. Despite its abundance, lignin remains one of the most underutilized renewable resources due to challenges associated with its depolymerization and product separation. Therefore, developing efficient and straightforward depolymerization methods to degrade and convert lignin into value-added products is imperative for promoting resource utilization and the sustainable development of biomass materials. In this review, the technical gaps between microwave-assisted and conventional heating methods for lignin conversion are highlighted and compared. Furthermore, the most recent advances in microwave-assisted lignin degradation and conversion to value-added products are summarized. The lignin-degrading mechanisms of thermochemical treatments, solvent effects, catalyst effects, and external fields are comparatively analyzed. In addition, recent trends in the development of microwave-assisted lignin conversion are discussed. This review also provides new insights for future work to address ongoing challenges such as low efficiency, low selectivity, and the scalability of microwave-assisted lignin conversion for industrial applications.

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微波辅助木质素转化研究进展

木质素是一种复杂的天然酚类大分子，在生产高价值酚类平台化学品方面具有相当大的潜力。尽管其丰富，木质素仍然是最未充分利用的可再生资源之一，由于其解聚和产物分离相关的挑战。因此，开发高效、简便的解聚方法降解木质素并将其转化为高附加值产品，对于促进生物质材料的资源利用和可持续发展是势在必行的。在这篇综述中，重点介绍了微波辅助和传统加热方法在木质素转化方面的技术差距。此外，综述了微波辅助木质素降解和转化为增值产品的最新进展。比较分析了热化学处理、溶剂作用、催化剂作用和外场作用对木质素降解机理的影响。此外，还讨论了微波辅助木质素转化的最新发展趋势。这一综述也为未来的工作提供了新的见解，以解决微波辅助木质素转化在工业应用中的低效率、低选择性和可扩展性等持续挑战。

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来源期刊

Renewable and Sustainable Energy Reviews 工程技术-能源与燃料

CiteScore

31.20

自引率

5.70%

发文量

1055

审稿时长

62 days

期刊介绍： The mission of Renewable and Sustainable Energy Reviews is to disseminate the most compelling and pertinent critical insights in renewable and sustainable energy, fostering collaboration among the research community, private sector, and policy and decision makers. The journal aims to exchange challenges, solutions, innovative concepts, and technologies, contributing to sustainable development, the transition to a low-carbon future, and the attainment of emissions targets outlined by the United Nations Framework Convention on Climate Change. Renewable and Sustainable Energy Reviews publishes a diverse range of content, including review papers, original research, case studies, and analyses of new technologies, all featuring a substantial review component such as critique, comparison, or analysis. Introducing a distinctive paper type, Expert Insights, the journal presents commissioned mini-reviews authored by field leaders, addressing topics of significant interest. Case studies undergo consideration only if they showcase the work's applicability to other regions or contribute valuable insights to the broader field of renewable and sustainable energy. Notably, a bibliographic or literature review lacking critical analysis is deemed unsuitable for publication.