Mechanistic details of the oscillatory Belousov-Zhabotinskii reaction

Györgyi, László; Turányi, Tamas; Field, Richard J.

doi:10.1021/j100381a039

Cited by 221 publications

(211 citation statements)

References 2 publications

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“…In particular, reducing the concentrations of H 2 SO 4 and NaBrO 3 resulted in a "slower" version of the BZ reaction and consequently in an acceptable production of CO 2 . Nevertheless, analogous trends of the effects induced upon addiction of SDS have been observed in both cases.…”

Section: Experimental Methodsmentioning

confidence: 99%

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Spatio-Temporal Perturbation of the Dynamics of the Ferroin Catalyzed Belousov−Zhabotinsky Reaction in a Batch Reactor Caused by Sodium Dodecyl Sulfate Micelles

et al. 2008

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The effects of the anionic surfactant sodium dodecyl sulfate (SDS) on the spatio-temporal and temporal dynamics of the ferroin-catalyzed Belousov-Zhabotinsky (BZ) reaction have been studied over a wide surfactant concentration range. For the first time, investigations were performed also for unstirred systems. The presence of SDS in the reaction mixture influences the oscillatory parameters to an extent that significantly depends on the surfactant concentration. The trend of the wave speed V upon the increasing amount of SDS was found to have a maximum at [SDS] ) 0.075 mol dm -3 (V ) 0.071 mm s -1 ), after which the speed decreased to 0.043 mm s -1 at [SDS] ) 0.5 mol dm -3 , which is below the value found in the absence of the surfactant (V ) 0.055 mm s -1 ). The response of the oscillatory BZ system to the addition of SDS has been ascribed to two different causes: (a) the peculiar capability of the organized surfactant assemblies to affect the reactivity by selectively sequestering some key reacting species and (b) the modifications induced by SDS on the physical properties of the medium. These hypotheses have been corroborated by performing spectrophotometric investigations on the stirred BZ system. Complementary viscosity measurements gave useful hints for the clarification of the surfactant role.

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Section: Experimental Methodsmentioning

confidence: 99%

“…3 The BZ reaction mechanism is very complex, and the latest proposed full models for the cerium catalyzed reaction involves more than 80 elemental steps. 4,5 In the Appendix section, we show a simplified model used for ferroin catalyzed BZ systems; we employed this model to perform the simulations reported in the discussion section.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Perturbation of the Dynamics of the Ferroin Catalyzed Belousov−Zhabotinsky Reaction in a Batch Reactor Caused by Sodium Dodecyl Sulfate Micelles

et al. 2008

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“…The numerous dynamic states such as simple, mixed−mode and chaotic oscillations obtained in BZ reaction system under various experimental conditions [18][19][20][21], can be obtained by numerical simulations using different models. They all have an important role in the modeling of a BZ reaction [14,[22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Short Overview Of the Belousov − Zhabotinsky Reactionmentioning

confidence: 99%

Current rates and reaction rates in the Stoichiometric Network Analysis (SNA)

et al. 2014

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Abstract:In stoichiometric network analysis (SNA) the instability condition is calculated by the current rates. Recently, we have shown that in the final result the current rates can be substituted by reaction rates, which is a more appropriate value for the examination of instability from experimental point of view. Here, we elaborate the problem of whether the current rates are necessary parameters in the calculation, with the aim of obtaining the region of instability. All calculations are performed on a model for Belousov-Zhabotinsky (BZ) reaction, which has not been examined by SNA.

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“…These requirements are met simultaneously through Process C, which involves the organic reactant, malonic acid (MA). A detailed understanding of Process C has only recently begun to emerge Györgyi, Turanyi e Field, 1990. However, the original representation of FKN allows to analyze the different aspects from a qualitative point of view.…”

Section: The Belousov-zhabotinsky Reactionmentioning

confidence: 99%