Bistable and oscillating chemical reactions

Pacault, A.; Ouyang, Qi; Kepper, P. De

doi:10.1007/bf01009529

Cited by 19 publications

(6 citation statements)

References 51 publications

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“…Many other similar chemical oscillators have been studied. [33,38,39] They all undergo two competing pathways. One of these pathways produces a specific intermediate, while the other pathway consumes it.…”

Section: Isothermal Oscillatorsmentioning

confidence: 99%

Strobes: Pyrotechnic Compositions That Show a Curious Oscillatory Combustion

et al. 2012

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Strobes are pyrotechnic compositions which show an oscillatory combustion; a dark phase and a flash phase alternate periodically. The strobe effect has applications in various fields, most notably in the fireworks industry and in the military area. All strobe compositions mentioned in the literature were discovered by trial and error methods and the mechanisms involved remain unclear. Many oscillatory systems such as Belousov-Zhabotinsky reactions, cool flames, self-propagating high-temperature synthesis have been observed and theories developed to elucidate their unstable behavior based on chemical interactions or based on physical processes. These systems are compared to experimental observations made on strobe mixtures.

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Section: Isothermal Oscillatorsmentioning

confidence: 99%

Strobes: Pyrotechnic Compositions That Show a Curious Oscillatory Combustion

et al. 2012

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“…[33,38,39] Einer dieser Reaktionswege erzeugt ein spezifisches Zwischenprodukt, das der andere Reaktionsweg verbraucht. [33,38,39] Einer dieser Reaktionswege erzeugt ein spezifisches Zwischenprodukt, das der andere Reaktionsweg verbraucht.…”

Section: Isotherme Oszillatorenunclassified

“…[36,37] Viele ähnliche chemische Oszillatoren wurden untersucht, und sie alle durchlaufen zwei konkurrierende Reaktionswege. [33,38,39] Einer dieser Reaktionswege erzeugt ein spezifisches Zwischenprodukt, das der andere Reaktionsweg verbraucht. Die Konzentration dieses Zwischenprodukts entscheidet über das Umschalten zwischen den Reaktionswegen.…”

Section: Isotherme Oszillatorenunclassified

Stroboskopgemische: pyrotechnische Mischungen mit oszillierendem Verbrennungsverhalten

Corbel

Lingen²,

Zevenbergen³

et al. 2012

Angewandte Chemie

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Stroboskopgemische sind pyrotechnische Zusammensetzungen, die ein oszillierendes Verbrennungsverhalten zeigen; eine Dunkel‐ und eine Leuchtphase alternieren periodisch. Der Stroboskopeffekt wird in verschiedenen Bereichen, aber hauptsächlich in der Feuerwerksindustrie und im militärischen Bereich angewendet. Alle Stroboskopgemische, die in der Literatur beschrieben werden, wurden durch systematisches Ausprobieren entdeckt und die zugrundeliegenden Mechanismen bleiben ungeklärt. Viele oszillierende Systeme wurden beobachtet, und es wurden Theorien entwickelt, die auf chemischen Prozessen oder physikalischen Prozessen beruhen, um ihr instabiles Verhalten aufzuklären. Diese Systeme werden mit experimentellen Beobachtungen an Stroboskopgemischen verglichen.

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“…Br" ^Brf K5 = 17 M"1 (5) Therefore, we determined the spectrum of Brf in perchloric acid. The isosbestic point of Br2 and Brf is at 441 nm, where e = 130.…”

Section: Br2mentioning

confidence: 99%

Kinetic study of the autocatalytic nitric acid-bromide reaction and its reverse, the nitrous acid-bromine reaction

Lengyel¹,

Nagy²,

Bazsa³

1989

J. Phys. Chem.

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The kinetics of the forward and backward processes of the reaction N03' + 2Br~+ 3H+ -Br2 + HN02 + H20 have been studied. The overall process is a true dynamic equilibrium. The same equilibrium position can be reached from either side and can be shifted by changing any of the species involved. The equilibrium constant was found to be AT, = (1.6 ± 0.3) X 10"1 23456 M'4. The oxidation of bromide by moderately concentrated nitric acid in batch is autocatalytic, nitrous acid being the catalyst. The influence of initial concentration of nitric acid, bromide, and nitrous acid was determined. In a continuously stirred tank reactor the reaction exhibits bistability. The reaction between bromine and nitrous acid has regular kinetics. A seven-step mechanism with intermediates NO, N02, BrN02, BrNO, and HOBr is proposed, which accounts for the stoichiometry, equilibrium nature, and kinetic behavior of the reaction. The agreement between experiments and calculations is generally satisfactory and in some cases excellent.

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Bistable and oscillating chemical reactions

Cited by 19 publications

References 51 publications

Strobes: Pyrotechnic Compositions That Show a Curious Oscillatory Combustion

Strobes: Pyrotechnic Compositions That Show a Curious Oscillatory Combustion

Stroboskopgemische: pyrotechnische Mischungen mit oszillierendem Verbrennungsverhalten

Kinetic study of the autocatalytic nitric acid-bromide reaction and its reverse, the nitrous acid-bromine reaction

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