O- And N-atom Measurements In High Temperature C2N2 + O Kinetics

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

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 N2O 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 N2O, 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 C2N2+O???products was found to be f2=2.14??-10 exp(-7130/7) cm1 s-1 (??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. Computer simulations based on a proposed kinetic mechanism further substantiate the existence of additional channel(s) to reaction (2). ?(C) 1986.

Author(s) Roth P. Louge Y. Hanson K. Journal Name Combustion and Flame Publication Date 1986 DOI 10.1016/0010-2180(86)90053-2

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