Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials, Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Int J Biol Macromol. 2022 Oct 1;218:431-438. doi: 10.1016/j.ijbiomac.2022.07.120. Epub 2022 Jul 25.
The search for renewable energy sources to replace fossil fuel has made lignin a promising carbon-containing resource. In this paper, LaNiO perovskite catalyst supported by mesoporous carrier with specific pore structure was prepared by the pore filling of MCM-41 with citrate complex precursors of nickel and lanthanum. Then the catalysts applied to maize straw lignin depolymerization. The results of low-angle XRD, N adsorption-desorption, IR spectroscopy and SEM confirmed that the catalyst has been successfully manufactured. Based on the yield of phenolic monomer, low molecular weight lignin derived bio-oil and high molecular weight lignin derived bio-oil as standard, the catalyst showed best catalytic effect when the reaction temperature was 250 °C, the reaction time was 6 h, the ratio of lignin to catalyst mass was 5: 1 and with ultrasonic assist. The yield of phenolic monomer was 11.46 wt% and that of bio-oil was 68.0 wt%. In general, this method is an excellent embodiment of the principle of Lignin-first as well as an excellent strategy for the production of value-added phenolics and high-quality bio-oils from lignin. It plays an important role in promoting the high value utilization of lignin in the future.
寻找可再生能源来替代化石燃料，使得木质素成为一种很有前途的含碳资源。本文采用柠檬酸络合前驱体填充 MCM-41 的方法，制备了具有特定孔结构的中孔载体负载的 LaNiO 钙钛矿催化剂。然后将催化剂应用于玉米秸秆木质素的解聚。通过小角 XRD、N2 吸附-脱附、IR 光谱和 SEM 等测试结果证实了催化剂的成功制备。基于酚类单体的产率、低分子质量木质素衍生生物油和高分子质量木质素衍生生物油为标准，当反应温度为 250℃、反应时间为 6 h、木质素与催化剂的质量比为 5:1 且超声辅助时，催化剂表现出最佳的催化效果。酚类单体的产率为 11.46wt%，生物油的产率为 68.0wt%。总的来说，这种方法是木质素优先原则的一个极好体现，也是从木质素生产增值酚类和高质量生物油的极好策略。它在未来促进木质素的高值化利用方面发挥着重要作用。
