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

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
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 Президиум СО РАН 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 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Dec 15, 2008
Accepted: Feb 13, 2009
Published online: Feb 25, 2009
Published print: Nov 15, 2009
Identifiers:
publication_identifier.wos_identifier_type WOS:000274348700012
publication_identifier.scopus_identifier_type 2-s2.0-75149153038
publication_identifier.rinz_identifier_type 20545359
publication_identifier.accession_number_identifier_type 2009:1511491
publication_identifier.chemical_accession_number_identifier_type 152:198442
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