Plasma assisted combustion has been extensively investigated for the last couple of decades. Non-thermal plasmas, in particular, have been demonstrated to improve ignition characteristics and even promote detonation. Here, we present an undiluted kinetic study of the plasma assisted oxidation of H$_2$, using a novel plasma chemical kinetics model and reaction mechanism, in combination with experiments performed in a temperature controlled DBD reactor. Through varying the reaction temperature, we observed negative temperature coefficient (NTC)-like behavior for the plasma assisted oxidation of H2 in the typical low-temperature range of 600–750 K. Our analysis shows, this NTC-like behavior originates from a combination of physical and chemical effects. For the physical effect, we highlight the importance of the reduced electric field strength. For the chemical effect, we demonstrate the changes in electron impact dissociation reactions together with a shift in reactivity with changing temperature, as a result of changes in the O$_3$ and HO$_2$ chemistry.
|Original language||English (US)|
|Title of host publication||13th Asia-Pacific Conference on Combustion|
|Publisher||Asia-Pacific Conference on Combustion|
|State||Published - Dec 4 2021|
Bibliographical noteKAUST Repository Item: Exported on 2022-01-31
Acknowledged KAUST grant number(s): BAS/1/1384-01-01
Acknowledgements: The research reported in this work was funded by King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1384-01-01.