Abstract
Pyrolysis and oxidation of formaldehyde were studied behind reflected shock waves in the temperature range 1160–1890 K at total pressures between 1.4 and 2.5 atm. Formaldehyde decay was followed by using time-resolved IR-laser absorption and IR-emission. The consumption of CH 2O was promoted by addition of O 2 and the increase in CH 2O concentration also brought about a promotion of the CH 2O consumption in the oxidation reaction. A mechanism that can explain the profiles obtained under our experimental conditions was examined by simulation. The present and earlier shock tube data were satisfactorily modeled with a 34-reaction mechanism. The CH 2O decay rate was very sensitive to the rate constants of the reactions 6, 9, and 25. Reaction 9 played a very important role in the CH 2O oxidation under our experimental conditions. New values of the rate constants of these reactions were derived. ▪
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