Abstract
The reaction of Fe atoms with NO was studied behind incident shock waves in the temperature range of 780–1,020 K at pressures between 0.3 and 1.2 bar. Atomic-resonance-absorption spectroscopy (ARAS) was applied for the time-resolved measurement of Fe , N, and O atoms in gas mixtures containing Fe(CO)5 and NO, highly diluted in argon. The experiments showed a Fe-atom consumption without an associated O- or N-atom formation which can be explained by a recombination of Fe and NO:
. The rate coefficient k 1 was obtained from pseudo-first-order analysis of the measured Fe-absorption profiles to be \({k_1 = 10^{8.99\pm0.3} \exp(7,020\pm 840\,{\rm K}/T) \,{\rm cm^3/ (mol \,s)}}\) with the uncertainty given at the 1−σ level. It showed an inverse temperature dependency. Variation of the experimental pressure does not have any effect on the rate coefficient.
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Communicated by K. Takayama
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Giesen, A., Herzler, J. & Roth, P. Shock wave kinetics of Fe + NO based on Fe, O, and N atom measurements. Shock Waves 16, 119–123 (2006). https://doi.org/10.1007/s00193-006-0054-x
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DOI: https://doi.org/10.1007/s00193-006-0054-x