Chemical structure of atmospheric pressure premixed laminar formic acid/hydrogen flames

The work presents an experimental and kinetic modeling study of laminar premixed formic acid [HC(O)OH]/H2/O2/Ar flames at different equivalence ratios (φ=0.85, 1.1 1.3) stabilized on a flat burner atmospheric pressure, as well flame speed HC(O)OH/O2/Ar (φ=0.5–1.5) 1 atm. Flame structure were simulated using three detailed chemical mechanisms proposed for oxidation. components in the fuel blends show consumption profiles, namely, hydrogen is consumed slower than acid. According to analysis, reason observed phenomenon that studied have but also intermediate product formed from HC(O)OH decomposition. Comparison measured shows all satisfactorily predict mole fraction profiles reactants, main products, intermediates. It noteworthy by Glarborg et al., Konnov al. updated AramcoMech2.0 adequately spatial variations fractions free radicals, such H, OH O HO2. However, some drawbacks used identified; particular, they concentrations CH2O. As simulations, mechanism predicts around two times higher values experiment, while good agreement with data.