Carbon Nanofibers Modified with Heteroatoms as Metal-Free Catalysts for the Oxidative Dehydrogenation of Propane

Authors

  • Yanila Marco,

    1. Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318
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  • Dr. Laura Roldán,

    1. Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318
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  • Dr. Edgar Muñoz,

    1. Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318
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  • Dr. Enrique García-Bordejé

    Corresponding author
    1. Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318
    • Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza (Spain), Fax: (+34) 976733318

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Abstract

Carbon nanofibres (CNFs) were modified with B and P by an ex situ approach. In addition, CNFs doped with N were prepared in situ using ethylenediamine as the N and C source. After calcination, the doped CNFs were used as catalysts for the oxidative dehydrogenation of propane. For B-CNFs, the effects of boron loading and calcination temperature on B speciation and catalytic conversion were studied. For the same reaction temperatures and conversions, B- and P-doped CNFs exhibited higher selectivities to propene than pristine CNFs. The N-CNFs were the most active but the least selective of the catalysts tested here. Our results also show that the type of P precursor affects the selectivity to propene and that CNFs modified using triphenylphosphine as the precursor provided the highest selectivity at isoconversion.

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