Kinetic study of plasma-assisted n-dodecane/O2/N2 pyrolysis and oxidation in a nanosecond-pulsed discharge

Hongtao Zhong, Xingqian Mao, Aric C. Rousso, Charles L. Patrick, Chao Yan, Wenbin Xu, Qi Chen, Gerard Wysocki, Yiguang Ju

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations

Abstract

The kinetics of low-temperature pyrolysis and oxidation of n-dodecane/O2/N2 mixtures in a repetitively-pulsed nanosecond discharge was studied experimentally and numerically. Time-resolved TD-LAS measurements, steady-state GC sampling, and mid-IR dual-modulation Faraday rotation spectroscopy measurements were conducted to quantify temperature as well as species formation and evolution. A plasma-assisted n-dodecane pyrolysis and oxidation kinetic model incorporating the reactions involving electronically excited species and NOx chemistry was developed and validated. Results showed that a nanosecond discharge can dramatically accelerate n-dodecane pyrolysis and oxidation at low temperatures. The numerical model agreed well with experimental data for the major intermediate species. From the pathway analysis, electronically excited N2* plays an important role in n-dodecane pyrolysis and oxidation. With addition of n-dodecane, NO concentration was significantly reduced, suggesting a strong NO kinetic effect on plasma-assisted low-temperature combustion via NO-RO2 and NO2-fuel radical reaction pathways. This study advances the understanding of the kinetics of plasma-assisted low-temperature fuel oxidation in N2/O2 mixtures.

Original languageEnglish (US)
Pages (from-to)6521-6531
Number of pages11
JournalProceedings of the Combustion Institute
Volume38
Issue number4
DOIs
StatePublished - 2021
Event38th International Symposium on Combustion, 2021 - Adelaide, Australia
Duration: Jan 24 2021Jan 29 2021

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

Keywords

  • Laser diagnostics
  • Low-temperature chemistry
  • N-Dodecane/O/N mixture
  • Nanosecond pulsed discharge
  • Plasma-assisted combustion

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