A shock tube study of the CH₂O + NO₂ reaction at high temperatures

The reaction of CH₂O with NO₂ has been studied with a shock tube equipped with two stabilized ew CO lasers. The production of CO, NO, and H₂O has been monitored with the CO lasers in the temperature range of 1140–1650 K using three different Ar‐diluted CH₂O‐NO₂ mixtures. Kinetic modeling and sensitivity analysis of the observed CO, NO, and H₂O production profiles over the entire range of reaction conditions employed indicate that the bimolecular metathetical reaction, NO₂ + CH₂O → HONO + CHO (1) affects most strongly the yields of these products. Combination of the kinetically modeled values of 𝓀₁ with those obtained recently from a low temperature pyrolytic study, ref. [8], leads to (Formula Presented.) for the broad temperature range of 300–2000 K.