Mass Spectrometric Methods for Chemical Kinetics in Shock Tubes

Shock‐tube and modeling study of acetaldehyde pyrolysis and oxidation

“…Reactions, CH 3 CHO + H, CH 3 , O 2 , O, OH, HO 2 → CH 2 CHO + H 2 , CH 4 , HO 2 , OH, H 2 O, H 2 O 2 have been neglected in the mechanism recently reported in the acetaldehyde pyrolysis and oxidation [14,15]. However, in this study, these reactions were found to be not negligible in the acetaldehyde pyrolysis and oxidation.…”

“…They evaluated the activation energies 85.0 and 84.0 kcal/mol for reactions (3) and (4), respectively. We assumed reactions (3) and (4) (3) and (4) was examined from our experimental data.…”

“…At high temperatures above 1000 K, however, there are only a few reports for it [1][2][3]. Colket et al [1] have studied the pyrolysis over the temperature range 1051-1224 K in a turbulent flow reactor.…”

“…Kern et al [3] have investigated the pyrolysis behind reflected shock waves using a TOF-shock tube in the temperature range 1400-1800 K. A valid mechanism under the above experimental conditions was proposed which modeled the experimental profiles. The proposed rate constant expression was k 1 = 3.0 × 10 14 exp(−80.0 kcal/RT) s −1 .…”

“…They evaluated the activation energies 85 and 84 kcal/mol for reactions (3) and (4), respectively. Although acetaldehyde decomposition seems to be in fall off region so that higher energy channels like reactions (3) and (4) are disfavored in our experimental conditions, the maximum value of k 3 and the value of k 4 will be discussed.…”