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High temperature determination of the rate coefficient for the reaction H2O + CN → HCN + OH

✍ Scribed by Attila Szekely; Ronald K. Hanson; Craig T. Bowman

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
565 KB
Volume
16
Category
Article
ISSN
0538-8066

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✦ Synopsis

The rate coefficient, k , of the reaction H,O + CN + HCN + OH has been determined in the temperature range 2460-2840 K using a shock tube technique. C2N2-H20-Ar mixtures were heated behind incident shock waves and the CN and OH concentration time histories were monitored simultaneously using broad-band absorption near 388 nm (CN) and narrow-line laser absorption at 306.67 nm (OH). The rate coefficient expression providing the best fit to the data was k = 2.3 x 1013 exp ( -6700/T) cm3/mol s with uncertainty limits of about ?45% in the temperature range 2460-2840 K. The rate coefficient of the reverse reaction was calculated using detailed balancing, and its extrapolation to lower temperatures was compared with previously published results.

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