Study of Transition Zones in the Carbon Monoxide Catalytic Oxidation on Platinum Using the Network Simulation Method

Juan Francisco Sánchez-Pérez, Jose Andres Moreno Nicolas, Francisco Alhama and Manuel Canovas
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Juan Francisco Sánchez-Pérez: Department of Applied Physics and Naval Technology, Universidad Politécnica de Cartagena (UPCT), Campus Alfonso XIII, 30202 Cartagena, Spain
Jose Andres Moreno Nicolas: Department of Mechanical Engineering, Materials and Manufacturing, Universidad Politécnica de Cartagena (UPCT), 30202 Cartagena, Spain
Francisco Alhama: Department of Applied Physics and Naval Technology, Universidad Politécnica de Cartagena (UPCT), Campus Alfonso XIII, 30202 Cartagena, Spain
Manuel Canovas: Metallurgical and Mining Engineering Department, Universidad Católica del Norte, Antofagasta 1240000, Chile

Mathematics, 2020, vol. 8, issue 9, 1-16

Abstract: A study of transition zones in the carbon monoxide catalytic oxidation over platinum is presented. After the design of a network model following the rules of the Network Simulation Method, it is run in a standard (free) software providing the fractional coverages of all species for different values of carbon monoxide partial pressure, the main parameter that produces the change between a stationary or periodic response. The design of the model is explained in detail and no assumptions are made concerning the removing of oxidation fractional coverage. The illusory chaotic behavior associated with an inadequate time step in the numerical algorithm is studied. This work provides an explanation for the transition (bifurcation) between the stationary and the periodical response studies making use of Poincaré plane and phase-diagrams. The extinction of variable fluctuation in the transition zone is analyzed to understand its relation with given values of transition partial pressures. Of particular interest is the small time span of the superficial fractional coverage of carbon monoxide fluctuation near the second transition partial pressure.

Keywords: catalyst; carbon monoxide; network simulation method; surface; transition zone; interface; dynamical systems; numerical techniques (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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