Determination of rate parameters based on NH2 concentration profiles measured in ammonia-doped methane–air flames

Viktor Samu, Tamás Varga, Igor Rahinov, Sergey Cheskis, T. Turányi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The experiments of Rahinov et al. (Combust. Flame, 145 (2006) 105–116) measuring NH2 concentration profiles in methane–air laminar flat flames doped with ammonia were re-evaluated. The flames were simulated with the FlameMaster code using a modified NOx combustion mechanism of the CRECK Modeling Group. Based on local sensitivity analysis results, Arrhenius parameters A, n, E of reaction steps NH2 + H = NH + H2 and NH3 + OH = NH2 + H2O were selected for optimization, which took into account not only the experimental data of Rahinov et al., but also related direct measurements and theoretical determinations as optimization targets. The optimized mechanism described the measured concentration profiles better than the original one, while the new rate parameter values were within the prior uncertainty limits obtained from the evaluation of literature data. The optimization process also provided new posterior uncertainty limits, which are within the prior uncertainty limits.

Original languageEnglish
Pages (from-to)679-683
Number of pages5
JournalFuel
Volume212
DOIs
Publication statusPublished - Jan 15 2018

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Keywords

  • Ammonia-doped methane flame
  • Burner stabilized laminar flat flame
  • Mechanism optimization
  • NOx chemistry in combustion systems
  • Uncertainty of rate parameters

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

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