Shock-tube water time-histories and ignition delay time measurements for H2S near atmospheric pressure
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The ignition delay times and laser-absorption water time histories for H2S-O2 mixtured diluted in 98% were measured in two different shock tubes around atmospheric pressure over a temperature range from 1445 K to 2210 K. Initially the water profiles were very poorly predicted with the same kinetic mechanisms. A model analysis showed that the reaction R62 SH + HO2 ⇆ H2S + O2 (in reverse) was mainly responsible for these poor predictions. It was possible to obtain better water predictions when the rate for R62 was divided by 10. A tentative model was proposed based on this assumption for R62 and good predictions were obtained for both the ignition delay times and water profiles as well as for former high-pressure shock-tube data with H2-H2S mixtures. More accurate rates for at least the reactions R62 and R46 would be needed.
author list (cited authors)
Mathieu, O., Mulvihill, C., & Petersen, E. L.