In-situ laser diagnostics of pentane oxidation and pyrolysis in nanosecond-pulsed plasma discharges

Aric Rousso, Xingqian Mao, Qi Chen, Yiguang Ju

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study explores plasma assisted pentane oxidation and pyrolysis in a nanosecond pulsed discharge using laser absorption spectroscopy and gas chromatography. An updated pentane model is developed with C0-C2 substitution by HP-Mech, plasma chemistry sub-mechanism, and new electron impact dissociation reactions added. Using temperature as a model input, the electron impact cross sections of pentane are adjusted so the model accurately predicts the pyrolysis steady state and time-dependent species profiles, and then tested on the oxidation case. Results show favorable prediction of pentane consumption and H2O and CH2O formation. CH4 is slightly under-predicted by the new model, while C2H2 is overpredicted, likely due to under-consumption, perhaps by radicals such as OH. The addition of electron impact dissociation reactions slows the overall oxidative pathway by a reduction in OH concentration and prevents over-prediction by adjusting the branching ratio towards smaller hydrocarbons instead of oxidative species.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
DOIs
StatePublished - 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Publication series

NameAIAA Aerospace Sciences Meeting, 2018
Number210059

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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