High-Temperature Reaction of NH3–N2O System in Shock Waves

Abstract

Abstract The high-temperature reaction of NH3 with N2O in shock waves was investigated by measuring ultaviolet absoption of NH3 and OH, and infrared emission of N2O, in the temperature range of 1700–2300 K on the mixture of NH3–N2O diluted with large amount of argon. A comparison of the observed decays of NH3 and N2O and the formation of OH with those obtained by computer simulation behind the incident shock wave was carried out. From the comparison, the rate constants of the following elementary reactions were determined: NH3+O→NH2+OH[k4=1012.5exp(−25.5 kJ⁄RT) cm3 mol−1 s−1]; NH3+OH→NH2+H2O[k5=1012.5exp(−8.4 kJ⁄RT) cm3 mol−1 s−1].