Kinetic analysis of the addition of CO2 to the flame in the combustion of methane

• Autorzy: Jerzak W. , Kuźnia M.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of the calculation of the effect of the CO2 addition in the combustion of methane in air enriched in oxygen up to 25 vol% on the variations in the concentrations of free radicals, CO and NO. The calculations constitute a complement to performed experiments with injecting CO2 at varying distances from the burner. Modelling of the kinetics of methane combustion was done in the Chemked II program by implementing the reaction mechanism GRI-Mech, version 3.0. Residence times of the reagents at temperatures of 1200, 1500 and 1800 K, necessary for obtaining the peak concentrations of H, OH, O and CO, have been determined. It has been demonstrated that the addition of CO2 reduces the peak concentrations of H, OH and O the stronger, the higher the temperature is. If the temperature in the flame region is at a level of 1200 K, then the CO2 addition lengthens the time necessary for achieving the peak reagent concentrations. For T=1100 K, a negligible effect of adding CO2 on the variation in the mole fractions of H, OH, O, CO was noted. The paper enumerates the predominant reactions included in the employed GRI-Mech system, which determine the consumption and production of H, OH, O, CO and NO in the flame.

Słowa kluczowe

EN

chemical kinetic modeling; oxy-combustion methane; CO2 addition; CO; NO

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2016
• Tom: Vol. 36 nr 1
• Strony: 59--67
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Jerzak W.

• AGH University of Science and Technology Faculty of Metal Engineering and Industrial Computer Science Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Kuźnia M.

• AGH University of Science and Technology Faculty of Metal Engineering and Industrial Computer Science Al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] Hwang D.-J., Park J., OH CH.-B., Lee K.-H. and Keel S. I.: Numerical study on NO formation in CH4-O2N2 diffusion flame diluted with CO2. International Journal of Energy Research, vol. 29 (2005) p. 107-120.
• [2] Biet J., Delfau J.L., Pillier L., Vovelle C.: Influence of CO2 and H2 on the Chemical Structure of a Premixed Lean Methane – Air Flame. Proceedings of the 3rd European Combustion Meeting 2007, Greece 11-14 04.2007.
• [3] Smith G.P., Golden D.M., Frenklach M., Moriarty N.W., Eiteneer B., Goldenberg M., Bowman C.T., Hanson R.K., Song S., Gardiner W.C., Lissianski V.V., Qin Z., http://www.me.berkeley.edu/gri_mech [last access: 04-03-2014]
• [4] Giménez-López J., Millera A., Bilbao R., Alzueta M.U.: Influence of stoichiometry and residence time on the oxidation of natural gas in a CO2 atmosphere. Proceedings of the 5th European Combustion Meeting 2011, UK 29.06-1.07.2011.
• [5] Cieutat D., Sanchez-Molinero I., Tsiava R., Recourt P., Aimard N., Prébendé C.: The Oxy-combustion burner development for the CO2 pilot at Lacq. Energy Procedia, vol. 1 (2009) p. 519-526.
• [6] Jerzak W.: Emissions of NOx and CO from natural gas combustion with adding CO2 at varying distances from the burner. Annual Set The Environment Protection (Rocznik Ochrona Środowiska), vol. 16 (2014), 148-160.
• [7] El Bakali A., Pillier L., Desgroux P., Lefort B., Gasnot L., Pauwels J.F., da Costa I.: NO prediction in natural gas flames using GDF-Kin® w 3.0 mechanism NCN and HCN contribution to prompt-NO formation. Fuel, vol. 85 (2006) p.896-909
• [8] Yu Y.: Gaseous fuel autoignition kinetic at high pressure : experimental and modelling study, Electronic Thesis or Dissertation, Université Lille - Sciences et Technologies 2012, http://doc.univ-lille1.fr [last access: 04-03-2014]
• [9] Sanchez A.L. and Williams F.A.: Recent advances in understanding of flammability characteristics of hydrogen. Progress in Energy and Combustion Science, vol. 41 (2014) p. 1-55.
• [10] Konnov A. A.: Remaining uncertainties in the kinetic mechanism of hydrogen combustion. Combustion and Flame, vol. 152 (2008) no. 4, p.507-528.
• [11] Mendiara T., Glarborg P.: Ammonia chemistry in oxy-fuel combustion of methane. Combustion and Flame, vol. 156 (2009) p.1937-1949.
• [12] Bibrzycki J., Poinsot T., Zajdel A.: Investigation of Laminar Flame Speed of CH4/N2/O2 and CH4/N2/O2 Mixtures Using Reduced Chemical Kinetic Mechanisms. Archivum Combustionis, vol. 30 (2010) no. 4, p. 287-296
• [13] Jelezniak M., Jelezniak I.: "Chemked-II version 3.5. Program for chemical kinetics of gas-phase reactions", http://www.chemked.com [last access: 04-03-2014]
• [14] Bale C.W., Chartrand P., Degtrov S.A, Eriksson G., Hack K., Ben Mahfound R., Melançon J., Pelton A.D. and Petersen S.: FactSage Thermochemical Software and Databases. Claphad, vol. 26 (2002) p. 189-228.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.