Isobutane ignition delay time measurements at high pressure and detailed chemical kinetic simulations

Ignition delay times, laminar flame speeds, and mechanism validation for natural gas/hydrogen blends at elevated pressures

“…The chemical kinetic mechanism used in this study, AramcoMech 1.3 [44], has its foundation in the work of Healy et al [4][5][6][7][8][9] and was built on the hierarchical nature of hydrocarbon mechanisms with the inclusion of our recently updated hydrogen/carbon monoxide sub-mechanism [45]. In addition, considerable changes have been made to the C 1 −C 2 portion of the mechanism which are detailed in the work of Metcalfe et al [44].…”

“…Healy et al [4][5][6][7][8][9] studied quinternary natural gas mix- Gersen et al [11] also observed an increase in global activation energy with higher hydrogen content in the mixture, by reason of the differences in activation energy (Ea) between the two pure fuels, finding that at higher temperatures, the ignition delay time is more greatly reduced by the addition of hydrogen to natural gas mixtures when compared to lower temperatures.…”

Oxidation of Ethylene—Air Mixtures at Elevated Pressures, Part 2: Chemical Kinetics

“…While further improvement is still needed, the current version is much improved over the original one as a result of the experiments and modeling presented in Kopp et al [1] and the present paper, respectively. ... [2] ... [9] ... [4] ... [13] ... [11] ... [12] ... [16] ... [8] ... [17] ... [7] ... [14] ... [10] ... [15] ... [19] ... [5] ... [20] ... [6] ... [21] ... [1] ... [22] ... [18] ... [23] Ċ ... [34] ... [31] ... [35] ... [32] ... [36] ... [33] ... [30] ... [37] ... [26] ... [38] ... [27] ... [39] ... [28] ... [40] ... [24] ... [41] ... [25] ... [42] …”

“…However, this characteristic is much less significant in ethylene than for a typical alkane [7,8]. As the temperature is increased further, this dependence disappears, with the predicted reactivity essentially the same for all equivalence ratios.…”

“…Three recent papers on the butane isomers detail the C 4 sub-mechanism [7][8][9] and CH 4 -based blends [10,11]. Presented in the following paragraphs are the changes that were made to the original mechanism to produce the current version of the model.…”