effect of initial reagent concentrations on the oscillatory behavior of the BZ reaction in a batch reactor

Ganaie, Nadeem B.; Peerzada, Ghulam Mustafa

doi:10.1002/kin.20442

Cited by 11 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This dependence of the oscillatory characteristics such as the induction period and time period is justified on the basis of the FKN mechanism 3,4, according to which the overall BZ reaction may be divided into the following three processes: consumption of bromide ion (process A), an autocatalytic reaction of bromous acid with the oxidation of catalyst (process B), and an organic reaction with the reduction of the catalyst (process C) From the data recorded in Table II, it is observed that with an increase in [BrO − 3 ], the induction period decreases. It is assumed that with an increase in the bromate concentration there is faster accumulation of the bromoderivative of aromatic substrate, thereby, shortening the induction period 19–21. The bromate chemistry harbors the autocatalytic step, which involves the single electron oxidation carried out by BrO 2 • .…”

Section: Resultsmentioning

confidence: 99%

A Kinetic Study on Catechol‐Based Belousov–Zhabotinsky Reaction

Shah¹,

Peerzada²,

Ganaie³

et al. 2012

Int J of Chemical Kinetics

Self Cite

View full text Add to dashboard Cite

The present investigation pertains to the kinetic study on bromate-driven and manganese ion catalyzed Belousov-Zhabotinsky oscillatory chemical reaction having catechol (1,2-dihydroxybenzene) as the organic substrate in aqueous acid media at 30 ± 0.1 o C under stirred conditions. Although some polyphenols as chemical oscillators are known in the literature but the role of catechol has been marginalized. The reaction system with catechol shows long-time series of periodic as well as aperiodic oscillations, which were monitored potentiometrically in the oxidation reduction potential (ORP) mode under batch conditions. The various oscillatory parameters such as induction time (t in ), time period (t p ), amplitude (A), and number of oscillations (N) were obtained by drawing a plot between redox potential (mV) versus time (s). It is found that the oscillatory parameters of the system vary with the concentration of the reacting species. The reaction system was also studied in different aqueous acid media, but the detailed studies with respect to experimental parameters have been made in aqueous sulfuric acid medium as it showed a broad oscillatory window and better oscillatory characteristics. Moreover, the oscillatory parameters in general and induction time in particular vary significantly with temperature (15 to 45 ± 0.1 o C). The activation parameters of the system have also been calculated. The oscillatory behavior of the reaction system was also confirmed spectrophotometrically. C 2012 Wiley Periodicals, Inc. Int J Chem Kinet 45: [141][142][143][144][145][146][147][148][149][150][151] 2013

show abstract

Section: Resultsmentioning

confidence: 99%

A Kinetic Study on Catechol‐Based Belousov–Zhabotinsky Reaction

Shah¹,

Peerzada²,

Ganaie³

et al. 2012

Int J of Chemical Kinetics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The induction period is observed due to the accumulation of crucial concentration of the organic iodinated species prior to the commencement of oscillations. [16][17][18] The steps (3) and (4) in the above skeleton mechanism describe the iodination of organic substrate, where S and S(enol) denote organic substrate and its enolic form respectively and IS stands for the iodinated organic substrate. But, the tyrosine added to the system as additive has favorable iodination sites and undergoes iodination.…”

Section: Effect Of [Tyrosine] As An Additivementioning

confidence: 99%

Effect of Different Chemical Species on the Behavior of Tyrosine in a Typical BR Oscillatory Chemical Reaction

Farhad

Peerzada

Ganaie³

et al. 2017

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Effect on the behavior of Tyrosine through a malonic acid (MA) based Briggs‐Rauscher (BR) oscillatory system was studied in order to understand the mechanistic details of thyroid metabolism in vitro, specifically the iodination of tyrosine. It was observed that the present BR system employing tyrosine as a main additive and malonic acid as substrate provides an example of entrainment oscillations, in which malonic acid is responsible for oscillations and in presence of tyrosine, the system showed different oscillatory behavior. The effects of various other chemical species such as SeO2, KSCN, KNO3, KBr and Fe(III) on the tyrosine in this malonic acid based BR system are studied. The study was supported by UV‐Visible spectrophotometry to study the interactions of these chemical species with Dushmann reaction, which is one of the important reaction steps in BR reaction mechanism, in order to investigate the key factors responsible for tyrosine iodination responsible for thyroxin formation. Needless to mention that, all the aforesaid chemical species have due role in normal thyroid metabolism in vivo and as such, the present BR system containing tyrosine as main (first) additive can help in understanding of thyroid metabolism.

show abstract

“…Oscillatory chemical reactions [1,2], which are very sensitive, are disturbed by various small interfering factors, making them useful as an advanced analytic technique for trace substances. These systems generally include the Belousov-Zhabotinsky(BZ) [3][4][5], Bray-Liebhafsky(BL) [6], and Briggs-Rauscher(BR) [7] oscillation systems. In particular, BZ reactions have been extensively studied to elucidate their mechanisms and to model the wider range of excitable media.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Light-Controlled Chemical Behavior and Mechanism in a Macrocyclic Copper Complex Catalyst–Acetone–Glucose–Bromate–Sulfuric Acid Oscillation System

Cui

Zhang

et al. 2019

Catalysts

View full text Add to dashboard Cite

In this paper, the effect of ultraviolet light on the [CuL](ClO4)2–glucose (Glu)–acetone (Act)–sodium bromate (NaBrO3)–sulfuric acid (H2SO4) oscillation system was studied. The reaction mechanism and Oregonator model were established to verify the mechanism. Comparison of the bromide ion electrode–platinum electrode correlation diagrams with and without ultraviolet light reveals a nontracking phenomenon in the bromide ion electrode–platinum electrode correlation diagram under illumination, indicating that the illumination will affect the changes in the bromide ion concentration in the system. During the process, as UV intensity increases, the concentration of bromide ions in the system increases, and bromide ions can inhibit chemical oscillations, resulting in a decrease in the amplitude of chemical oscillations, further verifying that the proposed mechanism is reasonable.

show abstract

effect of initial reagent concentrations on the oscillatory behavior of the BZ reaction in a batch reactor

Cited by 11 publications

References 17 publications

A Kinetic Study on Catechol‐Based Belousov–Zhabotinsky Reaction

A Kinetic Study on Catechol‐Based Belousov–Zhabotinsky Reaction

Effect of Different Chemical Species on the Behavior of Tyrosine in a Typical BR Oscillatory Chemical Reaction

Exploration of Light-Controlled Chemical Behavior and Mechanism in a Macrocyclic Copper Complex Catalyst–Acetone–Glucose–Bromate–Sulfuric Acid Oscillation System

Contact Info

Product

Resources

About