Journal
FUEL
Volume 212, Issue -, Pages 679-683Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2017.10.019
Keywords
NOx chemistry in combustion systems; Ammonia-doped methane flame; Burner stabilized laminar flat flame; Mechanism optimization; Uncertainty of rate parameters
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Funding
- Hungarian National Research, Development and Innovation Office - NKFIH [K116117]
- COST Action CM1404 SmartCats
- New National Excellence Program of the Ministry Of Human Capacities [UNKP-16-3]
- Open University of Israel Research Authority [47324]
- Ministry of National Infrastructures, Energy and Water Resources [21511034]
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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+ H-2 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.
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