Kinetic modelling of multiple-site activity and the kinetics of inhibition reactions in the hydrogenolysis of C2H6 on a nickel wire catalyst

S. Kristyán, Richard B. Timmons

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4 Citations (Scopus)

Abstract

Analysis of kinetic data on the rate of CH4 production in the hydrogenolysis of C2H6 carried out using a specially activated Ni wire catalyst indicates the presence of at least two distinct types of active surface sites on the catalyst. The results are interpreted in terms of competitive catalysis at these two sites but with only one type of site subject to irreversible inhibition. A model involving parallel competitive poisoning on one type of site is developed and shown to account for the observed results. From this model the separate activation energies for the normal hydrogenolysis reaction (129 kJ mol-1) and the self-poisoning reaction (146 kJ mol-1) are calculated.

Original languageEnglish
Pages (from-to)2825-2833
Number of pages9
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical chemistry in Condensed Phases
Volume83
Issue number9
DOIs
Publication statusPublished - 1987

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hydrogenolysis
Hydrogenolysis
poisoning
Nickel
nickel
wire
Wire
catalysts
Catalysts
Kinetics
kinetics
Catalysis
catalysis
Activation energy
activation energy

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

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AU - Kristyán, S.

AU - Timmons, Richard B.

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N2 - Analysis of kinetic data on the rate of CH4 production in the hydrogenolysis of C2H6 carried out using a specially activated Ni wire catalyst indicates the presence of at least two distinct types of active surface sites on the catalyst. The results are interpreted in terms of competitive catalysis at these two sites but with only one type of site subject to irreversible inhibition. A model involving parallel competitive poisoning on one type of site is developed and shown to account for the observed results. From this model the separate activation energies for the normal hydrogenolysis reaction (129 kJ mol-1) and the self-poisoning reaction (146 kJ mol-1) are calculated.

AB - Analysis of kinetic data on the rate of CH4 production in the hydrogenolysis of C2H6 carried out using a specially activated Ni wire catalyst indicates the presence of at least two distinct types of active surface sites on the catalyst. The results are interpreted in terms of competitive catalysis at these two sites but with only one type of site subject to irreversible inhibition. A model involving parallel competitive poisoning on one type of site is developed and shown to account for the observed results. From this model the separate activation energies for the normal hydrogenolysis reaction (129 kJ mol-1) and the self-poisoning reaction (146 kJ mol-1) are calculated.

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