✦ LIBER ✦

High-temperature reaction of C2 with NO including product channel measurements

✍ Scribed by T. Kruse; P. Roth

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 251 KB
Volume: 31
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(1999)31:1<11::aid-kin2>3.0.co;2-h

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✦ Synopsis

The reaction of C 2 radicals with NO was studied behind reflected shock waves in the temperature range

The shock-induced pyrolysis of acetylene, highly 3150 K Յ T Յ 3950 K. diluted in argon, was used as a well defined source for C 2 radicals, which were detected by ring-dye-laser absorption spectroscopy (RDLAS) at

The perturbation of the C 2 by 516.646 nm. the addition of NO to the initial mixtures results in a fast removal of the C 2 radicals, which is mainly caused by the reaction: k 5 C ϩ NO 9 9 : products (R5) 2 for which the overall rate coefficient 13 3 Ϫ1 Ϫ1

k ϭ 7.5 ϫ 10 ϫ exp(Ϫ4350/T)cm mol s 5 was obtained. The product channels of this reaction were studied by additional measurements of O-atoms, N-atoms, and CN radicals. O and N were detected using atomic resonance absorption spectroscopy (ARAS) and the CN radicals were followed by their emission using a spectrograph and an intensified CCD-camera. The reactions leading to the product channels and to were identified as the main channels with a branching

ratio of and while the channel leading to was found k /k ϭ 70% k /k ϭ 30%, CN ϩ CO (R5c) 5a 5 5 b 5 to be neglectable.

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