The NH₃‐NO‐O₂ reaction

Abstract

The purpose of this communication is to report the discovery of a new rapid homogeneous gas-phase reaction. This new reaction is the NH3-NO-02 reaction. There is, of course, nothing new about the reaction of NH3 and NO, the reaction of NH3 and 02, or the reaction of NO and 0 2 . The kinetics of these three re-

Rate constant for the reaction NH2+ NO from 216 to 480 K

“…Obvious uncertainties exist in the critical energy for reaction (9) and in the number of active oscillators in nitrosamide. Rigorous use of RRKM theory would remove the latter but not the former uncertainty.…”

“…Silver et al 6 Such a rearrangement very likely suggests the formation of an adduct. Nonetheless, the question of whether N 2 and H2O formation represents the exclusive channel for reaction has been questioned in connection with modeling 6,7 the "Thermal De-NO x +' process of Lyon 8,9 and in the flame oxidation of NH 3' 10 Miller et al 7 were the first to suggest that the necessary chain branching cannot recur unless reaction (1) creates radicals (i.e., either OH + N 2 H or OH + N 2 + H) at about equal rates ,ns the 11 20 + N 2 channel. Other channels have been considered and rejected.…”

The role of NNH in NO formation and control

“…The early experiments of Lyon and coworkers [106][107][108] indicated that NO 2 was not formed in the Thermal DeNO x process, pointing to a small rate constant for NNH + O 2 [1]. The detection of considerable amounts of NO 2 at higher oxygen concentrations [105] prompted Miller and Glarborg [21,22] Since O 2 is present in much larger quantities than NO in the process, the introduction of the NNH + O 2 reaction allowed the NNH lifetime to be shortened.…”

Rate constant for the NH3 + NO2 ? NH2 + HONO reaction: Comparison of kinetically modeled and predicted results

“…(1) NH 3 ϩ NO 2 9: NH 2 ϩ HONO Rosser and Wise derived the expression, k 1 Ј ϭ 5 ϫ 10 12 e Ϫ13840/T cm 3 mole Ϫ1 s Ϫ1 , for the temperature range of 600 -800 K, with no mechanistic details or interpretation. Bedford and Thomas [9] attempted to analyze their kinetic data obtained in a narrower temperature range of 615 -660 K in terms of a mechanism containing both NH and NH 2 radical reactions.…”