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Kinetics of the heterogeneous oxidation of ammonium sulfite

✍ Scribed by T. Gürkan; A. Nufal; I. Eroǧlu

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
607 KB
Volume
47
Category
Article
ISSN
0009-2509

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✦ Synopsis

The kinetics of the heterogenous oxidation of aqueous solutions of ammonium sulfite with oxygen transferring from the gas phase was investigated. Experimental data in the form of rate of oxygen uptake were obtained by utilizing a stirred cell. Results obtained from the cobalt catalyzed system were analyzed with the theory of absorption with fast chemical reaction. Experimental parameters were: concentration of ammonium sulfite, mole fraction of oxygen in gas phase, catalyst concentration, pH, temperature, ionic strength, and stirring speed. Results show that the reaction mechanism and consequently the order of the intrinsic rate of reaction were dependent on oxygen to sulfite ratio. A mechanism developed for sodium sulfite oxidation was found to describe the experimental results for wide ranges of concentration of the reactants.

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