Unified kinetics of n-heptane hydroisomerisation over various Pt/zeolite catalysts

Muhammad R. Usman, Faisal M. Alotaibi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Hydroisomerisation of n-heptane has been carried out over six Pt-loaded zeolite-based catalysts. The activity and selectivity of each catalyst under various operating conditions of temperature, pressure and time were studied. Generally, a low pressure and high temperature favoured the overall n-heptane conversion while the selectivity towards isomers decreased at high temperature as the overall conversion increased to a high value. Based on the initial rates, kinetic modelling of the experimental data was carried out using power law kinetics and a simplified dual-site Langmuir-Hinshelwood-Hougen-Watson (LHHW) model. The LHHW approach was found more appropriate in representing the experimental data obtained over each catalyst and a kinetic model equation developed on the basis of surface reaction rate controlling best fitted to the experimental data. The activation energies were found to be in the range 94-143 kJ mol-1.

Original languageEnglish
Pages (from-to)177-192
Number of pages16
JournalProgress in Reaction Kinetics and Mechanism
Volume41
Issue number2
DOIs
Publication statusPublished - 2016

Keywords

  • Dual-site Langmuir-Hinshelwood-Hougen-Watson model
  • Hydroisomerisation
  • N-heptane
  • Platinum catalyst
  • Zeolite

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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