Kinetics of Recombination of Atomic Oxygen at Room Temperature PDF Download

Author: H. L. PETERSEN
Publisher:
ISBN:
Category :
Languages : en
Pages : 1

Get Book Here

Book Description
OXYGEN WAS PARTLY DISSOCIATED BY A MICROWAVE DISCHARGE IN STATIC EXPERIMENTS, AND THE ABSOLUTE CONCENTRATION OF ATOMS WAS DETERMINED WITH A Wrede gage. The rate of recombination was measured by observing the radiation emitted as a result of the reaction of O atoms with a trace of NO2. An upper limit of 2.5 x 10 to the 14th power cc sq./mole sq. sec was established for the rate constant at 350 K of the reaction O + O + O2 yields O2 + O2. Since this upper limit is 1/3 to 1/2 times the value found in shocktube experiments for the same rate constant at 3500 K, it is concluded that the rate constant increases slowly with temperature instead of varying as an inverse power of absolute temperature, as has conventionally been assumed. In the same experiments, the rate constant for the reaction O + O2 + O2 yields O3 + O2 was found to be 1.1 x 10 to the 14th power cc sq./mole sq. sec at 350 K, in excellent agreement with other recent determinations. Recombination was strongly catalyzed by OH radicals in accordance with the mechanism O + OH + O2 yields HO2 + O2 and O + HO2 yields OH + O2. The rates of these reactions are reported. (Author).