Hydroisomerization and cracking of n-octane and C8 isomers on Ni-containing zeolites

Alois Lugstein, Andreas Jentys, Hannelore Vinek

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The hydrocracking and hydroisomerization of n-octane, 2,5-dimethylhexane and 2,2,4-trimethylpentane on Ni-containing ZSM-5, mordenite and beta catalysts was investigated at 20 bar hydrogen pressure and a temperature of 533 K. The activity decreased in the sequence ZSM-5≫BETA≈MOR for the n-octane conversion and increased in this sequence for the conversion of 2,5-dimethylhexane and 2,2,4-trimethylpentane. The selectivity for isomerization of n-octane and 2,5-dimethylhexane was the highest on NiHBETA and the lowest on NiHZSM-5. The trends in the activity and selectivity were explained by the accessibility of the acid sites, estimated by adsorption of probe molecules followed by IR spectroscopy, and by a simulation of the space available in the pores of these zeolites.

Original languageEnglish
Pages (from-to)119
Number of pages1
JournalApplied Catalysis A: General
Issue number1
StatePublished - 1999
Externally publishedYes


  • Beta catalysts
  • Hydrocracking
  • Hydroisomerization
  • Mordenite
  • ZSM-5
  • Zeolites
  • n-Octane


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