Inorganic Chemicals Industry ›› 2023, Vol. 55 ›› Issue (2): 141-148.doi: 10.19964/j.issn.1006-4990.2022-0316

• Catalytic Materials • Previous Articles    

Nitriding SBA-15 loaded highly dispersed transition metals for efficient direct dehydrogenation of propane

LI Haitao1(),ZHAO Yinfeng2()   

  1. 1. Shenyang University of Chemical Technology,Shenyang 110142,China
    2. Dalian Institute of Chemical Physics,Chinese Academy of Sciences,National Engineering Research Center of Lower-Carbon Catalysis Technology,Dalian 116023,China
  • Received:2022-05-23 Online:2023-02-10 Published:2023-02-16
  • Contact: ZHAO Yinfeng E-mail:1435913777@qq.com;yfzhao@dicp.ac.cn

Abstract:

Dehydrogenation catalysts with different transition metals of Co,Ni,Fe,Cu were prepared by impregnation method with SBA-15 modified by nitridation method as carrier.The mesoporous structure of the support after nitridation was confirmed by X-ray diffraction(XRD) and N2 adsorption desorption analysis.Scanning electron microscopy(SEM) confirmed that the metal was in a good state of high dispersion.Temperature programmed reduction(H2-TPR) and X-ray photoelectron spectroscopy(XPS) proved that nitriding SBA-15 changed the electronic structure of the metal,and the interaction between the carrier and the metal was significantly enhanced.Metal-loaded samples with a content of 1% were prepared by quantitative impregnation method,and their properties were evaluated.The experimental results showed that the order of catalytic PDH activity of different metals for propane dehydrogenation was Co-SBA-15N900-1%,Fe-SBA-15N900-1%,Cu-SBA-15N900-1%,Ni-SBA-15N900-1%.The Co-SBA-15N900-1% exhibited a propane conversion of 33% and a propylene selectivity of 88%,indicating its promising utilization in industry.

Key words: dehydrogenation of propane, transition metals, high dispersion, nitrided SBA-15

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