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

Muhammad R. Usman, Faisal M. Alotaibi

Research output: Contribution to journalArticle

1 Citation (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

Fingerprint

Zeolites
heptanes
catalysts
Catalysts
Kinetics
kinetics
selectivity
Catalyst selectivity
Surface reactions
Isomers
Temperature
surface reactions
Reaction rates
Catalyst activity
reaction kinetics
isomers
low pressure
Activation energy
activation energy
temperature

Keywords

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

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Unified kinetics of n-heptane hydroisomerisation over various Pt/zeolite catalysts. / Usman, Muhammad R.; Alotaibi, Faisal M.

In: Progress in Reaction Kinetics and Mechanism, Vol. 41, No. 2, 2016, p. 177-192.

Research output: Contribution to journalArticle

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