Guo Ge, Li Wenzhi, Ahmed Tauseef, Hu DuoDuo, Cui Ru, Zhang Baikai, Zhang Xia
Laboratory of Basic Research in Biomass Conversion and Utilization, University of Science and Technology of China 96 Jinzhai Road Hefei 230026 PR China
Institute of Energy, Hefei Comprehensive National Science Center Hefei 230031 PR China.
RSC Adv. 2021 Nov 25;11(60):37932-37941. doi: 10.1039/d1ra05354j. eCollection 2021 Nov 23.
Non-noble bimetallic NiMo supported on zeolitic imidazolate framework-derived porous carbon (NiMo@FDC) catalyst for lignin depolymerization has been successfully developed. The synergism between Ni and Mo species in NiMo@FDC catalyst could promote the catalytic cleavage of C-O linkages in Kraft lignin. At a low reaction temperature of 240 °C and under 4 MPa H, the lignin liquefaction yield was 98.85 wt% and minimum coke yield was 1 wt%, particularly when using 10%NiMo@FDC catalyst. Additionally, at a high reaction temperature of 300 °C and under 2 MPa H, there was an overall yield of 86 wt% of liquid product and 42 wt% of petroleum ether soluble product. The higher heating value (HHV) increased from 27.65 MJ kg to 34.11 MJ kg. In the cycling experiment, the bifunctional catalyst also demonstrated reversability and stability. The synergy of Ni hydrogenation sites and Mo coupled adsorption sites identified a possible mechanism path, which could offer considerable potential for lignin depolymerization.
已成功开发出用于木质素解聚的负载在沸石咪唑酯骨架衍生的多孔碳（NiMo@FDC）上的非贵金属双金属NiMo催化剂。NiMo@FDC催化剂中Ni和Mo物种之间的协同作用可促进硫酸盐木质素中C-O键的催化裂解。在240℃的低反应温度和4MPa H条件下，木质素液化产率为98.85 wt%，焦炭产率最低为1 wt%，特别是使用10%NiMo@FDC催化剂时。此外，在300℃的高反应温度和2MPa H条件下，液体产物的总产率为86 wt%，石油醚可溶产物的产率为42 wt%。高热值（HHV）从27.65 MJ kg增加到34.11 MJ kg。在循环实验中，双功能催化剂还表现出可逆性和稳定性。Ni加氢位点和Mo耦合吸附位点的协同作用确定了一条可能的机理路径，这为木质素解聚提供了相当大的潜力。
