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Chaotic Dynamics in the Three-Variable Kinetic Model of CO Oxidation on Platinum Group Metals Full article

Conference XVIII International Conference on Chemical Reactors
29 Sep - 3 Oct 2008 , Valletta
Journal Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212
Output data Year: 2009, Volume: 154, Number: 1-3, Pages: 82-87 Pages count : 6 DOI: 10.1016/j.cej.2009.02.017
Tags Catalytic reaction, Chaotic dynamics, CO oxidation, Kinetic model, Oscillations, Surface modification
Authors Lashina E.A. 1 , Chumakova N.A. 1 , Chumakov G.A. 1,2 , Boronin A.I. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, pr. Akad. Lavrentieva 5, 630090 Novosibirsk, Russia
2 Sobolev Institute of Mathematics SB RAS, pr. Akad. Koptyuga 4, 630090 Novosibirsk, Russia

Funding (1)

1 Siberian Branch of the Russian Academy of Sciences 107

Abstract: The paper addresses the development of a simple three-variable kinetic model of CO oxidation on metallic catalysts under isothermal conditions and the numerical study of chaotic dynamics of the reaction rate. It is suggested that, at some concentrations of the adsorbed oxygen, a surface modification occurs and the reaction capability of adsorbed oxygen changes, so that the activation energy of the interaction between the adsorbed species increases sharply. Moreover, oxygen atoms can penetrate into the subsurface catalyst layer. At some critical values of the subsurface oxygen concentration, the catalyst surface reconstructs and the probability of oxygen adsorption decreases sharply. Based on these suggestions, a three-variable kinetic model of CO oxidation on the metals of the platinum group is developed, which has the hierarchy of characteristic times and one slow variable. For the purpose of studying the dynamics of the model, the one-parameter family of two-variable subsystems with fast variables is considered, and the steady states and periodic solutions of these subsystems were investigated. The conditions are described under which the dynamics of the model becomes chaotic by means of a cascade of period-doubling bifurcations or owing to complex multipeak oscillations.
Cite: Lashina E.A. , Chumakova N.A. , Chumakov G.A. , Boronin A.I.
Chaotic Dynamics in the Three-Variable Kinetic Model of CO Oxidation on Platinum Group Metals
Chemical Engineering Journal. 2009. V.154. N1-3. P.82-87. DOI: 10.1016/j.cej.2009.02.017 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Dec 15, 2008
Accepted: Feb 13, 2009
Published online: Feb 25, 2009
Published print: Nov 15, 2009
Identifiers:
Web of science: WOS:000274348700012
Scopus: 2-s2.0-75149153038
Elibrary: 20545359
Chemical Abstracts: 2009:1511491
Chemical Abstracts (print): 152:198442
OpenAlex: W1979637310
Citing:
DB Citing
Web of science 21
Scopus 26
Elibrary 25
OpenAlex 22
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