Oxidative Dehydrogenation of Propane over MoOx and POx Supported on Carbon Nanotube Catalysts

Authors

  • Zhenwei Bai,

    1. State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning (China), Fax: (+86) 411-84986113
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  • Peng Li,

    1. State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning (China), Fax: (+86) 411-84986113
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  • Liping Liu,

    1. State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning (China), Fax: (+86) 411-84986113
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  • Prof. Dr. Guang Xiong

    Corresponding author
    1. State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning (China), Fax: (+86) 411-84986113
    • State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning (China), Fax: (+86) 411-84986113

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Abstract

Catalytic performance of MoOx–POx supported on oxidized carbon nanotube (oCNT) catalysts for oxidative dehydrogenation of propane has been investigated. The catalysts were characterized by XRD, TEM, and IR spectroscopy techniques and then tested through the propane oxidation dehydrogenation reaction. The results reveal that the addition of MoOx significantly improves the catalytic activity but reduces the selectivity to propene. In contrast, adding POx decreases the reactivity and increases the selectivity by suppressing the combustion reaction. Adding both POx and MoOx can improve the selectivity at the same conversion rate and thus increase the yield of the catalyst. As compared to MoOx/oCNTs, the stability of the MoOx–POx/oCNT catalyst is significantly improved. This is because the addition of POx can promote MoOx dispersion on the CNT surface and hence improve the catalytic performance.

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