Understanding the induction period of the Belousov-Zhabotinsky reaction

Cadena, Ariel; Pérez, Néstor; Ágreda, Jesús; Barragán, Daniel

doi:10.1590/s0103-50532005000200014

Cited by 20 publications

(19 citation statements)

References 6 publications

(8 reference statements)

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“…The reaction was carried out at 25.8 °C and the data recording lasted for 12 850 s. Figure depicts the dynamic variation of the absorbance values for cerium (IV) ions as a representative of [Ce 4+ ]. As can be seen in Figure , an induction period of about 830 s precedes the concentration oscillations in our experiment, which is in agreement with the findings reported by Cadena et al…”

Section: Methodssupporting

confidence: 94%

Feedback control strategies for a cerium‐catalyzed Belousov–Zhabotinsky chemical reaction system

et al. 2015

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A number of control schemes including nonlinear feedback, dislocated feedback, and speed feedback have been proposed and assessed for a bromate-malonic acid-cerium Belousov-Zhabotinsky batch reaction process. The tuning parameters of the Oregonator model were firstly adjusted based on a UV-vis spectrophotometric analysis in the experimental part of the research. The adjusted Oregonator model successfully reproduced the innate induction time and periodicity of the BZ-batch system. Subsequently, the controllers were implemented and numerical simulations were carried out by employing the multi-stage Adomian decomposition method. The nominal analysis method was used to study the linear stability of each design. All the controlled systems were found to be linearly stable for certain continuous regions of controller gain. The performance of the proposed control laws was assessed and the dislocated feedback control strategy was shown to be able to drive the system states toward desired setpoints quickly. Furthermore, the validity of the dislocated feedback control design was doubly ensured by the sliding mode control theory. It was found that those feedback schemes which manipulate cerium ion concentration can be practically realized by means of electrochemical oxidation or oxygen aeration. Our results were confirmed by the Simulink software package and the block diagram representations are included in the paper.

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Section: Methodssupporting

confidence: 94%

Feedback control strategies for a cerium‐catalyzed Belousov–Zhabotinsky chemical reaction system

et al. 2015

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“…According to the GTF model [4] the length of IP is determined by the concentration of bromomalonic acid (BrMA). The crucial amount of BrMA necessary for the onset of oscillations is produced through two main pathways: (a) the bromination of the enol form of malonic acid by Br 2 and (b) the reaction between Br 2 and the malonyl radical formed in the Ce-MA subsystem [8]. Previous works showed a direct relationship between the enolization constant of different organic substrates in BZ-like oscillating systems and the length of the IP [9–11].…”

Section: Introductionmentioning

confidence: 99%

Isotopic Effect on the Kinetics of the Belousov-Zhabotinsky Reaction

Rossi

Rustici

Rossi

et al. 2007

IJMS

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“…From figure , it was observed that the number of oscillations increased while as amplitude and induction period of the oscillations evolved a decreasing trend when perturbed before induction period. The change in the amplitude of the oscillations on perturbation testifies the interaction between Mac 3H and the metal catalyst i. e., cerium.…”

Section: Resultsmentioning

confidence: 96%

Interaction of a Weak Acid Cation Exchange Resin (Dowex Mac 3H) with the Belousov‐Zhabotinsky Reaction and Estimation of Metal Ions

Rashid

Ganaie²,

Peerzada

2020

ChemistrySelect

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The work pertains to the study on direct and indirect interaction of a macroporous weak acid cation exchange resin-Dowex Mac 3H form with Belousov-Zhabotinsky (BZ) reaction based on malonic acid-cerium-bromate-sulfuric acid system. In the direct mode, the above reaction was perturbed by adding 10% (w/w) of Dowex Mac 3H at three different time intervals, i. e., before the start of induction period, during the induction period and after the commencement of oscillations. This mode of interaction was studied to investigate the effect of heterogeneity on the dynamics of BZ reaction. The indirect interaction of the resin was studied by interacting the resin individually with the optimized metal catalyst for a particular period of time after which the supernatant was used as initial reagent in the otherwise optimized BZ system. The interaction was monitored with respect to the change in oscillatory parameters before and after loading the resin with metal catalyst. The selectivity of the resin towards cerium and iron (ferroin) was studied through the said BZ reaction using potentiometry as the main technique. It was found that resin is more selective towards ferroin. The selectivity of the resin towards the various metal ions was followed by their estimation using UV-Visible spectrophotometry. The effect of solvents on the ion exchange capacity (IEC) of the resin was also studied through the BZ reaction. Some solvents increased its IEC while others decreased it. The potentiometric results obtained were validated by spectroscopic findings and electrochemical studies.

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Understanding the induction period of the Belousov-Zhabotinsky reaction

Cited by 20 publications

References 6 publications

Feedback control strategies for a cerium‐catalyzed Belousov–Zhabotinsky chemical reaction system

Feedback control strategies for a cerium‐catalyzed Belousov–Zhabotinsky chemical reaction system

Isotopic Effect on the Kinetics of the Belousov-Zhabotinsky Reaction

Interaction of a Weak Acid Cation Exchange Resin (Dowex Mac 3H) with the Belousov‐Zhabotinsky Reaction and Estimation of Metal Ions

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