Xu Hao, Li Zhaofei, Meng Shijun, Jarvis Jack, Song Hua
Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB, Canada.
Commun Chem. 2021 Mar 11;4(1):34. doi: 10.1038/s42004-021-00472-8.
Cyclohexene skeletal isomerization towards methylcyclopentene is an economically favorable process due to the higher added value of the product. Traditional oxide-based catalysts face the challenge of achieving both high activity and stability. In this work, cyclohexene skeletal isomerization is achieved under mild conditions over designed zeolite-based catalysts with 96.8 wt.% liquid yield, 95.8 wt.% selectivity towards methylcyclopentene and satisfactory stability for multiple runs. The favorable performance is attributed to the unique acidic, structural and morphological features of the optimized cobalt/NaUZSM-5 catalyst. Further experimental data and DFT studies suggest that a carboncationic mechanism might be followed and that the reaction mainly occurs within the internal pores of the zeolite structures.
由于产物具有更高的附加值，环己烯向甲基环戊烯的骨架异构化是一个经济上有利的过程。传统的氧化物基催化剂面临着实现高活性和稳定性的挑战。在这项工作中，在温和条件下，通过设计的沸石基催化剂实现了环己烯骨架异构化，液体产率为96.8 wt.%，对甲基环戊烯的选择性为95.8 wt.%，并且在多次运行中具有令人满意的稳定性。这种良好的性能归因于优化后的钴/NaUZSM-5催化剂独特的酸性、结构和形态特征。进一步的实验数据和密度泛函理论研究表明，可能遵循碳阳离子机理，并且反应主要发生在沸石结构的内部孔道内。
