Experimental Study on the Combustion Characteristics of Syngas-Oxyfuel Diffusion Flames

Syngas-순산소 확산화염의 연소특성에 관한 실험적 연구

  • 이상민 (한국기계연구원 신재생청정시스템연구실) ;
  • 최원석 (한국기계연구원 신재생청정시스템연구실) ;
  • 안국영 (한국기계연구원 신재생청정시스템연구실)
  • Received : 2010.10.14
  • Accepted : 2010.12.17
  • Published : 2010.12.31


The characteristics of syngas-oxyfuel combustion has been investigated experimentally in the present study. Experimental measurements were conducted to aid a fundamental design of a syngas-oxyfuel combustor with a double coaxial burner configuration. To examine the effects of different syngas fuels on combustion characteristics, various fuel types are utilized such as commercial coal gases (Texaco, Shell), COG (cokes oven gas), and $CH_4$ as a main component of natural gas. $CO_2$ was added to the four fuel types as a diluent gas to reduce the flame temperature. The flame images and emission characteristics of NOx and CO were examined for various equivalence ratio and $CO_2$ dilution ratio. The results show that CO emission was rapidly increased as equivalence ratio approached the stoichiometry condition by reducing the amount of oxygen. As the $CO_2$ dilution increased, CO emission increased while NOx emission decreased due to reduced flame temperature. When the syngas-oxyfuel combustor is operated with 20~40% of $CO_2$ dilution ratio, the CO and NOx emission levels were kept below 50 ppm and 25 ppm, respectively, with a high concentration of $CO_2$ over 95 vol.% in exhaust gases.


Supported by : 한국학술진흥재단


  1. http://www.ipcc.ch.
  2. http://www.cdrs.re.kr.
  3. http://www.ieagreen.org.uk.
  4. R. W. Schefer, D. M. Wicksall and A. K. Agrawal, "Combustion of Hydrogen Enriched Methane in a Lean Premixed Swirl Stabilized Burner", Proceedings of Combustion Institute, 29, 2003, pp. 843-851.
  5. C. E. Baukal, "Oxygen-Enhanced Combustion", CRC Press, 1998.
  6. US Department of Energy, "Carbon Dioxide Emissions from the Generation of Electric Power in the United States", July 2000.
  7. H. M. Kvamsdal, O. Maurstad, K. Jordal and O. Bolland, "Benchmarking of gas-turbine cycles with $CO_{2}$ capture", Proceedings of GHGT-7, Vancouver, Canada, 2004.
  8. A. Lefebvre, "Gas Turbine Combustion", Taylor & Francis, 2nd Ed., 1999.
  9. T. C. Williams, C. R. Shaddix and R. W. Schefer, "Effect of Syngas Composition and $CO_{2}$-Diluted Oxygen on Performance of a Premixed Swirl- Stabilized Combustor", Combustion Science and Technology, Vol. 180, 2008, pp. 64-88.
  10. K. S. Sim, J. W. Kim, D. J. Kim and G. J. Hwang, "Status of Domestic Byproduct Hydrogen and Infrastructure", Trans. of the Korea Hydrogen Energy Society, Vol. 13, No. 3, 2002, pp. 70-78.
  11. H. K. Kim, Y. Kim, S. M. Lee and K. Y. Ahn, "Flame Structure and Emission Characteristics of Oxy-fuel Combustor", Energy and Fuels, Vol. 21, No. 3, 2007, pp. 1459-1467. https://doi.org/10.1021/ef060346g
  12. R. C. Flagan and J. H. Seinfeld, "Fundamentals of Air Pollution Engineering", Prentice Hall, 1988.
  13. Glassman, I., "Soot Formation in Combustion Processes", Proceedings of Combustion Institute, Vol. 22, 1989, pp. 295-311. https://doi.org/10.1016/S0082-0784(89)80036-0