Rate constants for the reaction of ground-state oxygen atoms with methanol from 297 to 544 K

The rate constant for the reaction of ground-state oxygen atoms with methanol has been determined between 297 and 544 K by a phase-shift technique using mercury photosensitized decomposition of N₂O to generate oxygen atoms. The relative oxygen atom concentration was monitored by the chemiluminescence from the reaction of oxygen atoms with nitric oxide. The results are accommodated by the Arrhenius expression k₁ = (9.79 ± 2.71) × 10¹² exp(?2267 ± 111)/T]cm³/mol·s, where the indicated uncertainties are 95% confidence limits for 10 degrees of freedom. As an incidental part of this work, the third-body efficiency of CH₃OH relative to N₂O for the reaction O + NO + M → NO₂ + M (M = CH₃OH) was determined to be 3.1 at 298 K.