ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Atomic resonance absorption spectroscopy (ARAS) was applied to measure S atoms, behind shock waves in COS/H2 pyrolysis or CS2/H2 photolysis systems. Both the pyrolysis of COS and the photolysis CS2 was used to generate the S atoms, which subsequently reacts with H2 via the reaction: The photolysis experiments were designed to provide clear first-order conditions for reaction (R3); i.e., the H2 concentration exceeds that of S by at least a factor of 100. The S atom profiles obtained during pyrolysis of highly diluted COS/H2/Ar mixtures were analyzed by computer simulations based on a simplified reaction mechanism using the rate coefficient k3 as a fitting parameter. Both groups of experiments covered the temperature range of 1257 K ≤ T ≤ 3137 K and lead to a rate coefficient of: \documentclass{article}\pagestyle{empty}\begin{document}$$ k_3 \,\, = \,\,6.0 \times 10^{14} \,{\rm exp}\left({ - 12070{{\rm K} \mathord{\left/ {\vphantom {{\rm K} T}} \right. \kern-\nulldelimiterspace} T}} \right){\rm cm}^{\rm 3} \,{\rm mol}^{ - 1} \,{\rm s}^{ - 1} $$\end{document}. © 1995 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550270604
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