Shock Tube Measurements and Kinetic Study of Methyl Acetate Ignition

Using
a shock tube facility, ignition delay times of methyl acetate
(MA) were measured covering the temperature range of 1120–1760
K, equivalence ratio range of 0.5–2.0, pressure range of 1.2–10
atm, and fuel mole fraction range of 0.5–2.0%. An Arrhenius
correlation for all of the measured data was obtained through multiple
linear regression. The correlation was further compared to the literature
correlation [Akih-Kumgeh, B.; Bergthorson, J. M. Combust.
Flame 2011, 158 (6), 1037−1048.], and
discrepancy was found between the two studies. Four existing chemical
kinetic models were used to simulate the measurements, and results
suggested that the Princeton model and the Yang model gave better
predictions on current ignition data compared to the Westbrook model
and the Akih-Kumgeh model. By updating the base model of the Princeton
model, a combined model was obtained, and it gave the best prediction
on current experimental data among all available models. Sensitivity
analysis and reaction pathway analysis were conducted on the basis
of the models that give reasonable predictions, i.e., the Princeton
model, the combined model, and the Yang model, to gain a further insight
into the ignition process of MA and make a comprehensive comparison
on different kinetic models.