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The kinetics of uncatalyzed sodium sulfite oxidation

✍ Scribed by Peter M. Wilkinson; Bert Doldersum; Peter H.M.R. Cramers; Laurent L. Van Dierendonck

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
809 KB
Volume
48
Category
Article
ISSN
0009-2509

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✦ Synopsis

The influence of pH, oxygen partial pressure, and sulfite conversion on the reaction rate of uncatalyzed sodium sulfite oxidation is determined experimentally at a temperature of 20Β°C. In addition to these experiments, the change in composition of the sulfite solutions during the reaction was estimated on the basis of equilibrium and activity constants. A comparison between the outcome of these calculations and the experimental results shows that the sulfite oxidation mechanism depends on the bisulfite concentration. Furthermore, it is argued that uncatalyzed sulfite oxidation is to bc recommended as a model reaction for mass transfer studies as an alternative to cobalt-catalyzed sulfite oxidation at low cobalt catalyst concentrations.

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