Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Bioresour Technol. 2018 Dec;269:465-475. doi: 10.1016/j.biortech.2018.08.065. Epub 2018 Aug 17.
Lignin is an abundant biomass resource in aromatic structure with a low price in market, which can serve as renewable precursors of value-added products. However, valorization rate of annually produced lignin is less than 2%, suggesting the need for technological advancement to capitalize lignin as a versatile feedstock. In recent years, efficient utilization of lignin has attracted wide attention. This paper summarizes the research advances in the utilization of lignin resources (mainly in the last three years), with a particular emphasis on two major approaches of lignin utilization: catalytic degradation into aromatics and thermochemical treatment for carbon material production. Hydrogenolysis, direct pyrolysis, hydrothermal liquefaction, and hydrothermal carbonization of lignin are discussed in detail. Based on this critical review, future research directions and development prospects are proposed for sustainable and cost-effective lignin valorization.
木质素是一种具有芳香结构的丰富生物质资源，市场价格低廉，可作为附加值产品的可再生前体。然而，每年生产的木质素的增值率小于 2%，这表明需要技术进步来充分利用木质素作为一种通用的原料。近年来，木质素的高效利用引起了广泛关注。本文总结了木质素资源利用的研究进展（主要集中在过去三年），特别强调了木质素利用的两种主要方法：催化降解为芳烃和热化学处理生产碳材料。详细讨论了木质素的氢解、直接热解、水热液化和水热碳化。在此基础上，提出了可持续和经济高效木质素增值的未来研究方向和发展前景。
