The Effect of the Oxygen-Enrichment on the PAH Production in Fuel-Rich $CH_4/CH_3Cl$ Premixed Flames

과농조건인 $CH_4/CH_3Cl$ 예혼합화염에서 산소부화가 PAH 생성에 미치는 효과

  • 이기용 (안동대학교 기계공학과)
  • Received : 2010.09.03
  • Accepted : 2010.11.17
  • Published : 2010.12.31

Abstract

Numerical simulations of freely propagating fuel-rich $CH_4/CH_3Cl$ premixed flames were performed at atmospheric pressure in order to understand the effect of the oxygen enrichment on the production of PAH. A chemical kinetic mechanism was used, which involved 157 gas-phase species and 1693 forward reactions. The calculated flame speeds were compared with the experiments for the flames established on the equivalence ratios of 1~1.6, the results of which were in good agreement. As the level of oxygen enrichment was increased, the concentrations of one or four ring aromatic hydrocarbons were decreased. This might cause the fact that the contribution of PAH species to soot was weakened.

Keywords

References

  1. Tanner, R.K., "Incineration of Industrial Waste", Prog. Energy Combust. Sci., Vol. 5, 1979, pp. 245-252 https://doi.org/10.1016/0360-1285(79)90010-8
  2. Karra, S.B., Gutman, D. and Senkan, S.M,. "Chemical Kinetic Modeling of Fuel-Rich $CH_{3}Cl/CH_{4}/O_{2}/Ar$ Flames", Combust. Sci. Technol., Vol. 60, 1988, pp. 45-62 https://doi.org/10.1080/00102208808923975
  3. Karra S.B. and Senkan, S.M., "Chemical structures of sooting $CH_{3}Cl/CH_{4}/O_{2}/Ar$ and $CH_{4}/O_{2}/Ar$ flames", Combust. Sci. Technol., Vol. 54, 1987, pp. 333-347 https://doi.org/10.1080/00102208708947059
  4. Steblev, A.V. and Frolov, Yu.E., "Soot formation in chlorine-hydrocarbon flames", Combustion, Explosion, and Shock Waves, Vol. 23, 1988, pp. 199-201
  5. McKinnon, J.T. and Howard J.B., "Application of soot formation model: effects of chlorine", Combust. Sci. Technol., Vol. 74, 1990, pp. 175-197 https://doi.org/10.1080/00102209008951687
  6. Marr, J.A., Allison, D.M., Gilvane, L.M., Yerkey, L.A., Monchamp, P., Longwell, J.P., and Howard, J.B., "The effect of chlorine on PAH, soot, and tar yields from a Jet stirred/Plug flow reactor system", Combust. Sci. Technol., Vol. 85, 1992, pp. 65-76 https://doi.org/10.1080/00102209208947159
  7. Shin, S.S. and Lee, K.Y., "The influence of $CH_{3}Cl$ on $CH_{4}/CH_{3}Cl/O_{2}/N_{2}$ premixed flames under the $O_{2}$ enrichment", Transactions of the Korean Society of Mechanical Engineers B, Vol. 29, 2005, pp. 255-262 https://doi.org/10.3795/KSME-B.2005.29.2.255
  8. Baukal, C.E. Oxygen-Enhanced Combustion, CRC Press, 1998
  9. Rogg, B., RUN-1DS: A Computer Program for the Simulation of One-dimensional Chemically Reacting Flows. University of Cambridge, 1991
  10. Appel, J., Bockhorn, H., and Frenklach, M., "Kinetic Modeling of Soot Formation with Detailed Chemistry and Physics: Laminar Premixed Flames of $C_{2}$ Hydrocarbons", Combust. Flame, Vol. 121, 2000, pp. 122-136 https://doi.org/10.1016/S0010-2180(99)00135-2
  11. Senkan, S.M., "Survey of Rate Coefficients in the C-H-Cl-O System", Gardiner, Jr. W.C., (Ed), Gasphase Combustion Chemistry, Springer, 2000
  12. Valeiras, H., Gupta, A.K. and Senkan, S.M., "Laminar Burning Velocities of Chlorinated Hydrocarbon-Methane-Air Flames", Combust. Sci. Tech., Vol. 36, 1987, pp. 123-133
  13. Shin, S.S., Vega, E.W. and Lee, K.Y., "Experimental and numerical study of $CH_{4}/CH_{3}Cl/O_{2}/N_{2}$ premixed flames under oxygen enrichment", Combustion, Explosion, and Shock Waves, Vol. 42, 2006, pp. 715-722 https://doi.org/10.1007/s10573-006-0106-7
  14. Vagelopoulos C.M., Egolfopoulos, F.N. and Law, C.K., "Further considerations on the determination of laminar flame speeds with the counterflow twin-flame technique", 25th Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1994, pp. 1341-1347
  15. Leylegian, J.C., Zhu, D.L., Law, C.K., and Wang, H., "Experiments and numerical simulation on the laminar flame speeds of dichloromethane and trichloromethane", Combust. Flame, Vol. 114, 1998, p. 285 https://doi.org/10.1016/S0010-2180(97)00326-X
  16. Wu, C.K. and Law, C.K., "On the determination of laminar flame speeds from stretched flames", Twentieth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1984, p. 1941
  17. Lewis, B. and Elbe G., Combustion, Flames and Explosions of Gases, 3rd Ed. Academic Press, 1987