The Kinetics of Elementary Reactions Involving the Oxides of Sulphur. I. The Nature of the Sulphur Dioxide Afterglow

Studies of the sulphur dioxide afterglow in the products of a weak discharge through sulphur dioxide and argon show that the main active species are O and SO. The chemiluminescent combination of these species produces the sulphur dioxide after glow, the intensity of which is proportional to [O] [SO]...

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Published in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1966-12, Vol.295 (1443), p.355-362
Main Authors: Clyne, M. A. A., Halstead, C. J., Thrush, Brian Arthur - Na4471
Format: Article
Language:English
Subjects:
Argon
Atoms
Dioxides
Ionization afterglow
Nitrogen
Oxides
Oxygen
Sulfur
Sulphur dioxide
Titration
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Summary:Studies of the sulphur dioxide afterglow in the products of a weak discharge through sulphur dioxide and argon show that the main active species are O and SO. The chemiluminescent combination of these species produces the sulphur dioxide after glow, the intensity of which is proportional to [O] [SO]. Sulphur monoxide reacts rapidly with nitrogen dioxide SO + NO2 = SO2 + NO + 59 kcal/mole. (3) Titration of the sulphur dioxide afterglow with nitrogen dioxide yields the sum of the O and SO concentrations, since reaction (2) is also fast, O + NO2 = NO + O2 + 46 kcal/mole. (2) The ratio k2 / k3 was found to be 0·67 ± 0·07 at 298°K. Klein & Herron’s (1964) value of k2 yields k3 = 5 x 1012 cm3 mole-1 s-1 at 298°K.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1966.0246