Shock-tube Studies of N2O Decomposition and N2O–H2 Reaction

Abstract

N2O decomposition and N2O–H2 reaction were studied behind incident and reflected shock waves in the temperature range 1450–2200 K and pressure range 0.6–3.5 atm using both single-pulse and time-resolve techniques. A computer-simulation study was performed to determine the rate-constant expressions of important elementary reactions. Computer calculations showed that the values of the rate constant for N2O+O\xrightarrowk2N2+O2 and N2O+O\xrightarrowk2NO+NO (cited in current papers) are too low. The rate-constant expressions were found to be k2=7.0×1014exp(−28 kcal/RT) cm3mol−1 s−1 and k3=5.6×1014exp (−28 kcal/RT) cm3 mol−1 s−1. The rate constant expression for N2O+H\xrightarrowk2N2+OH, was found to be k4=1.5×1014exp (−15 kcal/RT) cm3 mol−1 s−1.