Effect of Pt Incorporation into Ni/ZrO2–SO 4 = /Al2O3 Catalyst for n-Butane Isomerization

Three Ni/ZrO2–SO4=/Al2O3 catalysts with different concentrations of platinum (0.2, 0.3 and 0.4 wt%) were prepare and tested for n-butane isomerization reaction at 338 K, in absence and in presence of hydrogen. The results shown that, at low temperature, platinum contributes to the olefin or butyl io...

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Bibliographic Details
Published in:Catalysis letters 2006-02, Vol.107 (1-2), p.103-110
Main Authors: Pérez-Luna, M, Cosultchi, A, Toledo-Antonio, J A, Angeles-Chavez, C, Arce-Estrada, E M
Format: Article
Language:English
Subjects:
Aluminum oxide
Catalysis
Catalysts
Catalytic activity
Deactivation
Isomerization
Platinum
Zirconium dioxide
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Summary:Three Ni/ZrO2–SO4=/Al2O3 catalysts with different concentrations of platinum (0.2, 0.3 and 0.4 wt%) were prepare and tested for n-butane isomerization reaction at 338 K, in absence and in presence of hydrogen. The results shown that, at low temperature, platinum contributes to the olefin or butyl ion formation and the reaction follows a bimolecular pathway. However, when the reaction occurs in the presence of hydrogen, the formation of butyl ions is inhibited. The main feature of platinum addition is the stabilization of the catalytic activity, which is indicated by the slow deactivation constants compared to that of the unpromoted catalyst.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-005-9737-7