N-Hexane Isomerization on Ni-Pt/Catalysts Supported on Mordenite

DOI: 10.4236/mrc.2013.24017   PDF   HTML     4,922 Downloads   9,454 Views   Citations

Abstract

The aim of this work was to evaluate the catalytic properties for n-hexane isomerization of bifunctional monometallic (Ni or Pt) and bimetallic catalysts (Pt-Ni), using HMOR zeolite as support. The method used for metal dispersion in the zeolite was competitive ion exchange using ammine complexes [Ni(NH3)6]Cl2 and [Pt(NH3)4]Cl2 as precursors. The catalysts were characterized by X-Ray diffraction, X-Ray energy dispersion spectroscopy, temperature-programmed reduction and transmission electron microscopy. The n-hexane isomerization reaction using the catalysts was carried out to evaluate the catalyst activity. The reaction was carried out in a fixed bed reactor operating at 250?C, 1 atm, H2/C6 = 9 molar ratio. The profiles obtained from TPR suggest that, for bimetallic catalysts, the presence of platinum facilitates the reduction of Ni2+ cations. The bimetallic catalysts presented a higher activity in the isomerization of n-hexane when compared to the monometallic ones, as well better stability as the Pt content in the solid increases.

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G. Martins, E. Santos, M. Rodrigues, G. Pecchi, C. Yoshioka and D. Cardoso, "N-Hexane Isomerization on Ni-Pt/Catalysts Supported on Mordenite," Modern Research in Catalysis, Vol. 2 No. 4, 2013, pp. 119-126. doi: 10.4236/mrc.2013.24017.

Conflicts of Interest

The authors declare no conflicts of interest.

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