THE RATE OF REACTION OF ACTIVE NITROGEN WITH AMMONIA AND ETHYLENE

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Abstract
The rate constants for the reactions of C2H4 and NH3 are determined by termination of the reactions in the gas phase after different times of reaction. The average value for the rate constant of the N atom–C2H4 reaction at 150 °C is 1.8 × 1010 cc mole−1 sec−1, when the initial N-atom concentration is determined from the maximum production of HCN. The average value for the rate constant for the over-all reaction of NH3 with excited nitrogen molecules, at 104 °C in the "poisoned" system, and 83 °C in the "unpoisoned" system, for low initial flow rates of NH3, or short reaction time, is 2.2 × 1010 cc mole−1 sec−1. The decrease in value of this rate constant at higher initial flow rates of NH3 and longer reaction times in the "poisoned" system indicates that the species responsible for NH3 decomposition is generated during the decay of N atoms in the presence of NH3. The value for the NH3 reaction is discussed in terms of energy transfer.

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