Cu 基等级孔 ZSM-5 分子筛单晶的制备及硝基苯加氢催化性能

Xiaolan Xie, Zhan Liu, Jiamin Lyu, Shen Yu, Xiaoyun Li, Baolian Su, Lihua Chen

Research output: Contribution to journalArticlepeer-review

Abstract

In order to solve the problem of irreversible damage of zeolite framework in the process of intracrystalline hierarchically porous creation,a single crystal of silica-alumina zeolite ZSM-5(OMMS-ZSM-5)with hierarchically ordered macro-meso-microporous structure was successfully bottom-up in situ synthesized by using ordered macromesomicroporous carbon with anti-opal structure as a hard template,which possesses high external specific surface area(195.8 m2/g)and pore volume(0.27 cm3/g). In addition,a series of Cu-OMMS-ZSM-5 catalysts with different Cu loadings(mass fraction:1%,5%,10%)was prepared by impregnation method using OMMS-ZSM-5 as a carrier to investigate the catalytic ability of different metal loading catalysts in the liquid-phase hydrogenation reaction of nitro⁃ benzene. The physical and chemical properties of the prepared catalysts were comprehensively characterized by SEM,TEM,XRD,NMR,N2adsorption-desorption,NH3-TPD,XPS and H2-TPR tests,which shows that the Cu elements are highly dispersed in the form of CuO,and the conversion of nitrobenzene reaches up to 96.8% and the selectivity of aniline reaches 99.3% when the loading is 9.58%(mass fraction). Compared with the Cu-based micron ZSM-5 zeolite catalytic material,the aniline selectivity and the nitrobenzene conversion of Cu-OMMS-ZSM-5 are improved by 32.4% and 26.1%,respectively,and the high catalytic activity is maintained after three cycles.
Original languageChinese (Traditional)
Article number20230109
JournalGaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities
Volume44
Issue number10
DOIs
Publication statusPublished - 10 Oct 2023

Keywords

  • Aniline
  • Cu-ZSM-5
  • Hierarchically porous zeolite
  • Nitrobenzene hydrogenation

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