Platinum as a Chlorine Dioxide/Chlorite Redox Electrode in ClO2-Based Oscillating Reactions and a New Semibatch Oscillator:  The ClO2−Acetone System with I- Inflow

Volford, András; Wittmann, Mária; Marlovits, Gabor; Noszticzius, Zoltán; Gáspár, Vilmos

doi:10.1021/jp963399f

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…A reduced species model was also developed through a sensitivity analysis performed across a range of conditions relevant to Titan entry, as shown in Table 1 [9,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. As this model contains a smaller number of species and reactions, it is better suited to coupling with radiation flow solvers while still providing accurate results [9].…”

Section: A Titan Chemical Reaction Setmentioning

confidence: 99%

Analysis of Nonequilibrium CN Radiation Encountered During Titan Atmospheric Entry

Brandis

Morgan

McIntyre

2011

Journal of Thermophysics and Heat Transfer

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The focus of this paper is to analyze the Titan reaction scheme and determine the mechanisms that control the formation and decay of the radiation emitted by the cyanogen molecule (CN) during entry into Titan's atmosphere. Through a parametric study of important reactions combined with an investigation into reaction pathways, it has been concluded that the coupling between the dissociation of N 2 and the formation of the CN (through the reaction N 2 C $ CN N) controls the radiation decay rate. The reason for the super equilibrium concentrations (approximately 50% higher than equilibrium) was identified to be a result of the N 2 C $ CN N reaction continuing to overproduce the CN after nominal equilibrium values were reached. This is due to the slow buildup of N to drive the reverse reaction. The absolute level of emitted radiation has been shown to be controlled by the lifetime of the CNB state and the excitation of CNX to CNB by heavy particle impact. Thus, it is the conclusion of this paper that CN radiation is primarily controlled by N 2 dissociation.

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Section: A Titan Chemical Reaction Setmentioning

confidence: 99%

Analysis of Nonequilibrium CN Radiation Encountered During Titan Atmospheric Entry

Brandis

Morgan

McIntyre

2011

Journal of Thermophysics and Heat Transfer

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“…The qualitative changes of state of the contents of the CSTR were monitored with a Pt electrode. No attempt was made to connect this electropotential measurement to quantitative concentration changes . The disk of hydrogel, 0.2 mm thick, was made of 2% agarose (Fluka 0570) loaded with the same concentration of PVA as the mix in the CSTR.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…No attempt was made to connect this electropotential measurement to quantitative concentration changes. 32 The disk of hydrogel, 0.2 mm thick, was made of 2% agarose (Fluka 0570) loaded with the same concentration of PVA as the mix in the CSTR. One face of the disk was in contact with the contents of the CSTR, the other face was pressed against an impermeable surface.…”

Section: Experimental Conditionsmentioning

confidence: 99%

Dividing Blobs, Chemical Flowers, and Patterned Islands in a Reaction−Diffusion System

et al. 1998

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In an one-side-fed open spatial reactor operated with the chlorine dioxide−iodine−malonic acid reaction in the presence of polyvinyl alcohol, we systematically studied the growth dynamics of Turing patterns after a supercritical parameter change. We describe different modes of propagation of the patterned state in an absolutely unstable uniform state, among which are a spot division and a finger splitting mode. We attribute these peculiar growth modes to the existence of two different uniform states and to a morphological instability of a propagating front linking these two states. In regions where bistability between the Turing state and a uniform state is obtained, the interface between the patterned state and the uniform state can be brought to a halt and thus localized patterned states are observed.

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“…Besides gels, membranes also play an important role in living systems as structural elements. Various membranes are also applied in open reactors − mainly to fix the catalyst, but selective feeding of certain chemical components via membranes is also known. , With this new gel and membrane technology complex devices such as a chemical diode and logic gates for chemical waves were constructed recently. These are important results because they demonstrate that not only signal transmission but also signal processingas in biological systems or in electronic circuitsis also possible with reaction−diffusion systems and complex reactors.…”

Section: Introductionmentioning

confidence: 99%

Electrolyte Transistors: Ionic Reaction−Diffusion Systems with Amplifying Properties

et al. 1998

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The problem of constructing chemoelectric amplifying devices based on acid−base reactions is discussed. It is shown that the construction of a direct analogue of the semiconductor transistor (that is, when the p- and n-doped semiconductors are replaced by ion exchange membranes in the H+ and OH- forms, respectively) is technically not feasible. The new amplifying device reported here is based exclusively on mobile ions migrating in a hydrogel arrangement that contains no fixed charges. The polarization curve of an acid−base interface in this medium has a diode characteristic. When two of such “electrolyte diodes” are connected appropriately, a transistor action can be observed: the electric current flowing in one (reverse biased) diode is affected not only by the voltage applied there but also by the current flowing through the other (forward biased) diode. The common emitter current gain of an acid−base−acid transistor studied here was between 4 and 5. The active mode characteristics of this device can be explained by the appearance of an acidic tunnel across the alkaline middle section. Although the acid−base−acid transistor is a stable amplifying device, the base−acid−base transistor is unstable in its active mode and displays complex oscillations. The underlying bistable behavior was also demonstrated with this transistor when its acidic feedstream was contaminated with KCl.

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Platinum as a Chlorine Dioxide/Chlorite Redox Electrode in ClO₂-Based Oscillating Reactions and a New Semibatch Oscillator: The ClO₂−Acetone System with I^- Inflow

Cited by 6 publications

References 19 publications

Analysis of Nonequilibrium CN Radiation Encountered During Titan Atmospheric Entry

Analysis of Nonequilibrium CN Radiation Encountered During Titan Atmospheric Entry

Dividing Blobs, Chemical Flowers, and Patterned Islands in a Reaction−Diffusion System

Electrolyte Transistors: Ionic Reaction−Diffusion Systems with Amplifying Properties

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