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O- and N-atom measurements in high temperature C2N2 + O kinetics

✍ Scribed by P. Roth; M.Y. Louge; R.K. Hanson

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
547 KB
Volume
64
Category
Article
ISSN
0010-2180

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✦ Synopsis

The reaction of O-atoms with cyanogen was studied behind reflected shock waves using mixtures of nitrous oxide and cyanogen dilute in argon (10/100, 15/150, and 30/300 ppm N20/ppm C2N2, with temperatures in the range 1780 _< T ~ 2285K and pressures of about 1.9 bar. Generation of O-atoms was achieved by the thermal decomposition of N20, and the reaction with C2N2 was monitored using resonance absorption measurements of the atomic species O and N (ARAS). The rate of disappearance of O-atoms by the reaction C2N: + O ~ products (2) was found to be k:=2.14x 10 -1Β° exp(-7130/T) cm 3 s -I (_+20%). Measured N-atom concentration profiles confirm the reaction products CN + NCO and the rate of reaction (2a) measured by Louge and Hanson [4], but a comparison of O-and N-atom profiles suggests, one or more additional channels to reaction (2), C2N2 + O--*CN + NCO (2a) --*other products.

Computer simulations based on a proposed kinetic mechanism further substantiate the existence of additional channel(s) to reaction (2).

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