Determination of Rate Coefficients for Reactions of Formaldehyde Pyrolysis and Oxidation in the Gas Phase

摘要: Seven mixtures of formaldehyde and oxygen diluted in argon were studied behind reflected shock waves at temperatures from 1340 to 2270 K pressures 0.7 2.5 atm. Mixture compositions covered a range pure pyrolysis lean oxidation stoichiometric ratio 0.17. The progress reaction was monitored by laser absorption CO molecules. Experimental rates formation found be 80% higher, the case pyrolysis, 30% lower, under oxidation, than those predicted current model, GRI-Mech 1.2. collected experimental data subjected extensive detailed chemical kinetics analysis, including optimization with solution mapping technique. analysis identified strong correlation between two rate constants. Assuming recent literature expression for one them produced k-1a = 2.66 × 1024T-2.57e-215/T cm6 mol-2 s-1 H + HCO M → CH2O M. A new developed HO2 H2O2, k6 4.11 10...