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On the Possibility of Thermokinetic Oscillations in the Reaction of Methane Oxidation on Nickel

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Abstract

The paper demonstrates the possibility of occurrence of thermokinetic oscillations during the methane oxidation on a nickel industrial catalyst at real values of the parameters. It is shown that reaction rate oscillations can originate under the conditions of short contact times and in the region where periodic oxidation–reduction processes do not occur. The origin of these thermokinetic oscillations is the periodic blocking of the surface with carbon and its cleaning by removing carbon from the catalyst surface.

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Funding

This study was performed under government contract no. 122040500058-1.

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Authors and Affiliations

  1. Faculty of Computational Mathematics and Cybernetics, Moscow State University, 119992, Moscow, Russia

    N. V. Peskov

  2. Semenov Institute of Chemical Physics, 119991, Moscow, Russia

    M. M. Slinko

Authors
  1. N. V. Peskov
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  2. M. M. Slinko
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Correspondence to M. M. Slinko.

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Abbreviations and notations: XPA, X-ray phase analysis; θ, coverage degree; θ*, coverage of free surface active sites; k0, pre-exponential konstant for adsorption processes; s, sticking coefficient; m, the molecular mass; kB, Boltzmann’s constant; Тg, the gas temperature; NS, number of adsorption sites per unit catalyst area; E, activation energy; Tc, catalyst temperature; R, gas constant; \({{N}_{{\text{A}}}}\), Avogadro number; W, catalyst mass; Sc, catalyst surface; \({{C}_{{\text{p}}}}\), specific heat capacity of the catalyst; \(h\), effective heat transfer coefficient; \(\Delta H\), heat effect; t, time; P, pressure; V, the reactor volume; F, feed rate.

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Peskov, N.V., Slinko, M.M. On the Possibility of Thermokinetic Oscillations in the Reaction of Methane Oxidation on Nickel. Kinet Catal 64, 303–310 (2023). https://doi.org/10.1134/S0023158423030072

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  • DOI: https://doi.org/10.1134/S0023158423030072

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