Kinetics of NOx formation from N2/O2/C2H4/Ar mixtures in repetitively-pulsed dielectric-barrier discharges

Kuninori Togai, Nicholas Tsolas, Richard A. Yetter

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

Abstract

The catalytic cycle of NO and NO2 (NOx) is known to be one of the mechanisms through which plasma enhances the ignition of hydrocarbons. To better understand the kinetics of NOx within a non-equilibrium plasma, the formation of NOx by repetitively pulsed dielectric-barrier discharges was studied experimentally and numerically. The experiments were carried out by applying highvoltage pulses on N2/O2/C2H4 mixtures highly diluted with Ar, flowing through a flow reactor at isothermal conditions. Numerical simulations were performed by a zero-dimensional plasma kinetics code, which combines CHEMKIN and a Boltzmann equation solver. The present work examines the kinetics at different temperatures and mixture compositions over a wide range of timescales. Even at low temperatures, the major NOx formation path is identified to be the one found in the Zel'dovich mechanism, namely N+O2→NO+O, owing to the production of N atoms by the plasma. The enhancement of the hydrocarbon oxidation by the NOx catalytic cycle is confirmed, and the products of the oxidation process are discussed in detail.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
PublisherCombustion Institute
Pages398-403
Number of pages6
ISBN (Electronic)9781629937199
Publication statusPublished - Jan 1 2013
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 - Clemson, United States
Duration: Oct 13 2013Oct 16 2013

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
CountryUnited States
CityClemson
Period10/13/1310/16/13

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All Science Journal Classification (ASJC) codes

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

Cite this

Togai, K., Tsolas, N., & Yetter, R. A. (2013). Kinetics of NOx formation from N2/O2/C2H4/Ar mixtures in repetitively-pulsed dielectric-barrier discharges. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 (pp. 398-403). (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013). Combustion Institute.