Effect of temperature on manganese II-ion-catalyzed bromate-driven oscillators

• Autorzy: Rachwalska M.
• Języki publikacji: EN

Abstrakty

EN

In this paper the system: Mn2(+)-malonic acid-H2504-KBrO3 was investigated. The reaction occurred in a state far from equilibrium because a flow-through reactor was used. By measuring the platinum electrode potential and bromide ion selective electrode potential for the system studied a bifurcation diagram was obtained. Many various concentrations of reactants were used. After obtaining the bifurcation diagram, such a set of reactants' concentrations was investigated at various temperatures for which the reaction had an oscillatory character. Basing on these results it was possible to estimate the activation energy of the reaction as equal to 47.8 = 5.3 kJ/mol. It was found that under CSTR conditions Q(10) values become as low as 1.6. For two sets of initial concentrations an anomalous behavior of the oscillation period was observed. In this case the period of oscillation does not decrease when increasing the temperature but increases.

Słowa kluczowe

EN

temperature effects; manganese; bromate; oscillator

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 1998
• Tom: Vol. 46, No. 4
• Strony: 459--467
• Opis fizyczny: Bibliogr. 22 poz.

Twórcy

autor

Rachwalska M.

• Faculty of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków (Wydział Chemii UJ}