Experimental and kinetic study on laminar flame speeds of formic acid

Laminar Burning Velocities of Formic Acid and Formic Acid/Hydrogen Flames: An Experimental and Modeling Study

“…It is notable that the trend of agreement between experimental and modeling results presented in this work differs from that obtained in the work of Yin et al, 28 in which model 1 provided equally good agreement between experiment and modeling in the entire range of equivalence ratios, whereas model 3 slightly underestimated the values of laminar flame speed in the same range of equivalence ratio, compared to experimental results (for unburned gas blends temperatures of 423 and 453 K and oxygen fraction from 30 to 40%).…”

“…The main reason for this difference in performance of applied mechanisms appears to have been caused by different rate constants for the reactions of H abstraction from the formic acid molecule and the subsequent decomposition of formed radicals. The authors combined the mechanisms Aramco 3.0 29 and of Glarborg et al 21 The resultant mechanism slightly underestimated the laminar burning velocity values, disagreeing with the work of Sarathy et al 22 The work by Yin et al 28 also showed that the increase of equivalence ratio and the increase of oxygen content in the blend resulted in higher diffusional-thermal instability. For lean blends, the decrease of flame thickness was observed, indicating that lean flames were less stable, than stoichiometric and rich flames.…”

“…Another recent paper by Yin et al 28 experimentally examined the laminar burning velocity of formic acid at temperatures 423 and 453 K, atmospheric pressure, and at an equivalence ratio between 0.4 and 1.6. Modeling results with the Aramco 3.0 29 and Glarborg et al 21 mechanisms were also reported.…”

“…Laminar burning velocity is an important combustion parameter. Currently, only four ,,, have reported data on the laminar flame speed of formic acid flames, and these works predicted different behavior in such flames. Moreover, pure formic acid is known to have poor combustion properties; a possible solution is to add a small amount of hydrogen to improve combustion.…”

A study of the chemical structure of laminar premixed HC(O)OH/O2/Ar flames at 1 atm

“…Laminar burning velocities of formic acid/air blends were measured in another recent work [22] at temperatures 423 K and 453K. The authors tested mechanism developed by Glarborg et.al [19] and Aramco 3.0 mechanism [23].…”