Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 39 - 54 (1983)
Update date:2022-08-17
Topics:
Alba, Francesca D'
Lorenzi, Sergio Di
This work attempts to provide a new theoretical model for oscillating chemical systems based on phase exchange and pulsating supersaturation.Phase exchange is of two types: one is steady exchange from the solution to the gas above it while the other is pulsating exchange between nucleations of bubbles of gas and the solution.The pulsating supersaturation allows nucleations of bubbles to form and oscillations to take place.We consider several variables, viz. temperature, bulk reaction, volume and size of the reactor, rate of stirring and pressure, and study their influence on the oscillations.The theoretical results are compared with some experimental results that can be explained by our new model.The system considered are the oxidation of malonic acid by bromate or iodate with cerium as catalyst and the oxidation of oxalic acid and formic acid.
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