High-temperature measurements of the rates of the reactions CH2O + Ar → Products and CH2O + O2→ Products

The two-channel thermal decomposition of formaldehyde [CH2O], (1a) CH2O + Ar → HCO + H + Ar, and (1b) CH2O + Ar → H2 + CO + Ar, was studied in shock tube experiments in the 2258–2687 K temperature range, at an average total pressure of 1.6 atm. OH radicals, generated on shock heating trioxane–O2–Ar mixtures, were monitored behind the reflected shock front using narrow-linewidth laser absorption. 1,3,5 trioxane [C3H6O3] was used as the CH2O...