催化作用
果糖
化学
异构化
吸附
热解
无机化学
氮气
化学工程
有机化学
工程类
作者
Qidong Hou,Mian Laiq Ur Rehman,Xinyu Bai,Chao Xie,Ruite Lai,Hengli Qian,Tianliang Xia,Guanjie Yu,Takeshi Yao,Haijiao Xie,Ju Mei
标识
DOI:10.1016/j.apcatb.2023.123443
摘要
Glucose isomerization to fructose is an essential step for biomass valorization, but implementing this reaction via chemocatalysis suffers from low reaction efficiency and inferior catalyst reusability. Herein, MgO was incorporated into nitrogen-doped carbon via pyrolysis of ZIF-8 with MgCl2 to synchronously enhance the catalytic performance and stability. The resultant MgO/NC-700 catalyst gave fructose yields of 42.9 and 41.2% at glucose loading of 10 and 20 wt%, respectively, approaching to the upper limit of reaction equilibrium. The average fructose productivity was 0.2267 mmol g-1 h-1, more than 2.29 times higher than the state-of-the-art heterogeneous catalysts. Moreover, the catalyst showed good stability and reusability without complicated regeneration steps. Isotope labelling study by NMR spectra revealed that the reaction is mainly proceeded via proton transfer mechanism. Both static adsorption experiment and DFT calculation indicated that the shift of reaction equilibrium towards fructose is due to the preferential adsorption of glucose.
科研通智能强力驱动
Strongly Powered by AbleSci AI