An Investigation of the Reaction of CH₃ Radicals with O₂ at High Temperatures

Abstract

Abstract The reaction of CH 3 radicals with O 2 was investigated behind incident shock waves at temperatures between 1400 and 2300 K and total densities between 2 · 10 −6 and 8 · 10 −6 mol/cm 3 . The formation of O and H atoms was followed by atomic resonance absorption spectroscopy (ARAS) at 130.5 nm and 121.6 nm. A rate constant of 2.3 · 10 13 exp(–15400 K/ T ) cm 3 /mol s for the reaction CH 3 O 2 + CH 3 O + O was determined.