Kinetics of ozone formation in the pulse radiolysis of oxygen + ethylene mixtures

Abstract

Pulse radiolysis of O₂+ C₂H₄ mixtures has been used to determine the rate constant of the reaction O + O₂+ M → O₃+ M (M = C₂H₄) the values, obtained from the kinetics of O₃ formation and from the dependence of the O₃ yield on C₂H₄ concentration, being 6.5 ± 0.7 × 10^–32 and 5.3 ± 0.5 × 10^–32 cm⁶ molecule^–2 s^–1, respectively.

Competition studies, in the absence and presence of SF₆, show that C₂H₄ depresses the primary yield of O atoms from pulse irradiated O₂, the maximum depression by C₂H₄ being the same as that by SF₆.