Qin Hengfei, Zhou Yue, Huang Qianyu, Yang Zhou, Dong Ruoyu, Li Long, Tang Jianghong, Zhang Chunyong, Jiang Feng
School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, China.
Sustainable Functional Biomaterials Lab, Department of Wood Science, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
ACS Appl Mater Interfaces. 2021 Feb 3;13(4):5460-5468. doi: 10.1021/acsami.0c21664. Epub 2021 Jan 20.
3D monolithic reactor has shown great promise for varied heterogeneous catalysis reactions including water treatment, energy generation and storage, and clean fuel production. As a natural porous material, macroporous wood is regarded as an excellent support for inorganic catalyst due to its abundant polar functional groups and channels. On the other hand, a metal organic framework (MOF) has been widely used as heterogeneous catalyst due to its high specific surface area and large amount of microporosities. Combining macroporous wood and a microporous MOF is expected to produce a high-performance 3D reactor and is demonstrated here for Fischer-Tropsch synthesis. The carbonized MOF/wood reactor retains the original cellular structure with over 180 000 channels/cm. When being decorated with hexagonal-shaped core-shell Co@C nanoparticles aggregates derived from Co-MOF, the MOF/wood reactor resembles a multi-cylinders reactor for Fischer-Tropsch synthesis. Because of the unique combination of macro- and microporous hierarchical structure, the 3D MOF/wood reactor demonstrates exceptional performance under high gas hourly space velocity (81.2% CO conversion and 48.5% C selectivity at 50 L·h·g GHSV). This validates that MOF/wood can serve as a multi-cylinders and high-power reactor for catalytic reactions, which is expected to be applicable for environmental and energy applications.
3D整体式反应器在包括水处理、能源生产与存储以及清洁燃料生产等多种多相催化反应中展现出了巨大的潜力。作为一种天然多孔材料，大孔木材因其丰富的极性官能团和通道而被视为无机催化剂的优良载体。另一方面，金属有机框架（MOF）因其高比表面积和大量微孔而被广泛用作多相催化剂。将大孔木材与微孔MOF相结合有望制备出高性能的3D反应器，本文展示了其在费托合成中的应用。碳化的MOF/木材反应器保留了原始的细胞结构，每厘米有超过180000个通道。当用源自Co-MOF的六边形核壳Co@C纳米颗粒聚集体进行修饰时，MOF/木材反应器类似于用于费托合成的多气缸反应器。由于宏观和微观多孔分级结构的独特组合，3D MOF/木材反应器在高气时空速下表现出卓越的性能（在50 L·h·g GHSV时，CO转化率为81.2%，C选择性为48.5%）。这证实了MOF/木材可作为用于催化反应的多气缸和高功率反应器，有望应用于环境和能源领域。
