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Kinetics and possible mechanism of hydrogen chloride oxidation over supported copper-containing salt catalysts: II. Kinetics of HCl oxidation in the deacon and methane oxychlorination reactions over the CuCl2-KCl-LaCl3 catalyst

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Abstract

The kinetics of HCl oxidation at 350–425°C over the supported CuCl2-KCl-LaCl3 catalyst has been investigated using a gradientless technique. The HCl oxidation kinetics in the Deacon and methane oxychlorination reactions has been studied in order to substantially extend the \(Cl_2 \left( {P_{Cl_2 } } \right)\) partial pressure variation range. When the reaction rate is independent of P HCl, HCl oxidation on the copper-potassium catalysts is described by the same rate equation, irrespective of whether the catalyst contains lanthanum or not. The introduction of lanthanum chloride increases the HCl oxidation rate by one order of magnitude. The rate equation obtained has significant advantages over the equation corresponding to the Kenney-Slama equation. The kinetic features of HCl oxidation over the lanthanum-containing catalyst, whether the process depends on P HCl or not, can be explained in terms of the superposition of the Kenney-Slama dissociative mechanism and the catalytic mechanism suggested here. The role of lanthanum chloride in both HCl oxidation pathways is considered.

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Authors and Affiliations

  1. Karpov Institute of Physical Chemistry, Moscow, 105064, Russia

    A. G. Aglulin

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  1. A. G. Aglulin
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Correspondence to A. G. Aglulin.

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Original Russian Text © A.G. Aglulin, 2014, published in Kinetika i Kataliz, 2014, Vol. 55, No. 5, pp. 610–620.

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Aglulin, A.G. Kinetics and possible mechanism of hydrogen chloride oxidation over supported copper-containing salt catalysts: II. Kinetics of HCl oxidation in the deacon and methane oxychlorination reactions over the CuCl2-KCl-LaCl3 catalyst. Kinet Catal 55, 582–591 (2014). https://doi.org/10.1134/S0023158414050024

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  • DOI: https://doi.org/10.1134/S0023158414050024

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