An experimental and detailed kinetic modeling study of the pyrolysis and oxidation of DMF over a wide range of conditions

A new chemical kinetic mechanism of DMF (N, N-dimethylformamide) is proposed. To assess the reliability of the mechanism, high pressure shock tube, single pulse shock tube and constant volume reactor were used to experimentally evaluate ignition delay times, high temperature pyrolysis , and laminar flame speeds of DMF, respectively. Ignition delay times of DMF/ “air” were measured for equivalence ratios of 0.5, 1.0, and 2.0, pressures of 2.0 and 10.0 bar, and temperature ranging from 900 to 1430 K. Additionally, ignition delay times of DMF/acetone/air were measured for equivalence ratios of 0.5 and 1.0, pressures of 2.0 and 10.0 bar, and temperature ranging from 900 to 1430 K. High temperature pyrolysis products of DMF/acetone mixtures, diluted in argon, were studied at 5.0 bar, temperatures between 1000 and 1600 K. Flame speed measurements of DMF/air were obtained for pressures of 100 and 200 kPa, temperatures of 398, 423, and 448 K, and equivalence ratios from 0.7 to 1.4. Simultaneously, a chemical kinetics mechanism was developed to simulate the experimental results using ChemKin Pro, with sensitivity and flux analysis being carried out to elucidate limitations and possible refinements.