Role of the reagents consumption in the chaotic dynamics of the Belousov–Zhabotinsky oscillator in closed unstirred reactors

Maria Liria Turco Liveri, Marcello Antonio Budroni, Federico Rossi, Nadia Marchettini, Marco Masia, Mauro Rustici

Risultato della ricerca: Articlepeer review

22 Citazioni (Scopus)

Abstract

Chemical oscillations generated by the Belousov–Zhabotinsky reaction in batch unstirredreactors, show a characteristic chaotic transient in their dynamical regime, which is generallyfound between two periodic regions. Chemical chaos starts and finishes by following a direct andan inverse Ruelle–Takens–Newhouse scenario, respectively. In previous works we showed, bothexperimentally and theoretically, that the complex oscillations are generated by the couplingamong the nonlinear kinetics and the transport phenomena, the latter due to concentration anddensity gradients. In particular, convection was found to play a fundamental role. In this paper,we develop a reaction–diffusion–convection model to explore the influence of the reagentsconsumption (BrO 3 in particular) in the inverse transition from chaos to periodicity.We demonstrated that, on the route towards thermodynamic equilibrium, the reagentsconcentration directly modulates the strength of the coupling between chemical kinetics andmass transport phenomena. An effective sequential decoupling (reaction–diffusion–convection -reaction–diffusion - reaction) takes place upon the reagents consumption and this is at the basisof the transition from chaos to periodicity
Lingua originaleEnglish
pagine (da-a)11062-11069
Numero di pagine8
RivistaPhysical Chemistry Chemical Physics
Volume12
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

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  • Physical and Theoretical Chemistry

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