THERMAL SCIENCE

International Scientific Journal

Ibtissem Hraiech

,

Jean-Charles Sautet

,

Sébastien Yon

,

Abdallah Mhimid

COMBUSTION OF HYTHANE DILUTED WITH CO2

ABSTRACT
With increasing concern about energy shortage and environmental protection, improving engine fuel economy and reducing exhaust emissions have become major research topics in combustion and engine development. Hythane (a blend of hydrogen H2 and natural gas NG) has generated a significant interest as an alternative fuel for the future. This paper describes an experimental study of the effects of CO2 addition on the stability of a turbulent jet diffusion NG-H2 flame. The mole fraction of hydrogen (% H2) in NG-H2 mixture was varied from 0% to 50%. The equivalence ratio of the hythane/CO2/air mixture was kept at stoichiometry. The results show that the lift-off height increases with the addition of CO2 at various % H2 content in hythane. However, we observe that with 20% H2, we can obtain a stable flame diluted with 40% CO2, while for 0% H2, the flame is blown out above 20% CO2. This means that the limits of flame blowing out are pushed with the additions of H2. Moreover, the results show that for %H2 content in NG-H2 fuel up to 10%, the addition of CO2 could produce lifted flame if the % CO2 is low. At higher % CO2 dilution, flame would remain attached until blow-out. This is mainly due to the fact that the dilution leads to ejection velocities very high but reactivity of the mixture does not change so the flame tends to stretch.
KEYWORDS
hythane, hydrogen enrichment of natural gas flames, CO2 dilution, flame stability
PAPER SUBMITTED: 2012-01-19
PAPER REVISED: 2013-07-02
PAPER ACCEPTED: 2013-07-10
PUBLISHED ONLINE: 2013-08-04
DOI REFERENCE: https://doi.org/10.2298/TSCI120119100H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 1, PAGES [1 - 10]
REFERENCES
  1. Choudhuri, A.R., Gollahalli, S.R., Combustion characteristics of hydrogen-hydrocarbon hybrid fuels, J.I.Hydrogen Energy, 25 (2000), pp.451-462
  2. Cozzi, F., Coghe, A., Behavior of hydrogen-enriched non-premixed swirled natural gas flames, J.I. Hydrogen Energy, 31 (2006),pp. 669-677
  3. Heffel, J.W., Int J Hydrogen Energy, 28(2003), 8, pp.901-8
  4. Kabat, D.M.,Heffel, J.W., Int J Hydrogen Energy, 27(2002) ,10,pp.1093-102
  5. Heffel, J.W., Int J Hydrogen Energy, 28(2003), 11, pp.1285-92
  6. Kumar, M.S.,Ramesh, A.,Nagalingam, B., Int J Hydrogen Energy, 28(2003),10,pp.1143-54
  7. Al-Baghdadi, M.A.S., Renewable Energy, 28(2003), 9, pp.1471-8
  8. Huang, J., Bushe, W.K., Hill, P.G., Munshi, S.R., Experimental and kinetic study of shock initiated ignition homogeneous methane-hydrogen-air mixtures at engine-relevant conditions, Int j of Chemical Kinetics, 38(2006), 4, pp.221-233
  9. Hadj Ali, K., Etude cinétique de l'oxydation de l'auto-inflammation en milieu gazeux homogène pauvre et ultra pauvre de carburants de substitution issus de la biomasse,Ph. D.thesis , Université des Sciences et technologies de Lille, France,2007
  10. Gersen, S., Anikin, N.B., Mokhov, A.V., Levinsky, V.B., Ignition properties of methane/hydrogen mixtures in rapid compression machine, Int J Hydrogen Energy,33(2008) ,7, pp.1957-1964
  11. Choudhuri, A.R., Gollahalli, S.R., Characteristics of hydrogen hydrocarbon composite fuel turbulent jet flames, I. J. Hydrogen Energy, 28(2003), pp.445-454
  12. Ilbas, M., Crayford, A., Yilmaz, I., Bowen, P., Syred, N., Laminar burning velocities of hydrogen-air and hydrogen-methane-air mixtures: an experimental study. Int J Hydrogen Energy, 31(2006), pp.1768-1779
  13. Kumar, P., Mishra, D.P., Experimental investigation of laminar LPG-H2 jet diffusion flame, Int J hydrogen Energy, 33(2008), pp.225-31
  14. El-Ghafour, S.A.A. , El-dein, A.H.E., Aref, A.A.R., Combustion characteristics of natural as-hydrogen hybrid fuel turbulent diffusion flame, J.I. Hydrogen Energy,35(2010),pp.2556-2565
  15. Yon, S., Sautet, J.C., Flame lift-off height, velocity flow and mixing of hythane in oxy-combustion in a burner with two separated jets, Applied Thermal Engineering 32(2012) , 1, pp. 83-92
  16. Liu, F.S., Guo, H.S., Smallwood, G.J., The chemical effect of CO2 replacement of N2 in air on the burning velocity of CH4 and H2 premixed flames, Combustion and flame,133(2003) ,4, pp.495-497
  17. Mazas, A.N., Lacoste, D.A., Schuller,T., Experimental and numerical investigation of the laminar flame speed of CH4/O2 mixtures diluted with CO2 and H2O, Proceeding of ASME Turbo Expo: Power for Land, Sea and Air GT2010, Glasgow, UK,2010
  18. Dally, B.B., Riesmeier, E., Peters, N., Effect of fuel mixture on moderate and intense low oxygen dilution combustion, Combustion and Flame, 137(2004), pp.418-431
  19. Du, D. X., Axelbaum, R. L., Law, C. K., Soot Formation in Strained Diffusion Fames with Gaseous Additives, Combustion and Flame, 102(1995),1-2, pp. 11-20
  20. Zhang, C., Atreya, A., Lee, K., Sooting structure of methane counterflow diffusion flames with preheated reactants and dilution by products of combustion, Twenty-Fourth Symposium (International) on Combustion,24(1992),1, pp. 1049 - 1057
  21. Oh, K. C., Shin, H. D., The effect of oxygen and carbon dioxide concentration on soot formation in nonpremixed flames, Fuel, 85(2006),5-6, pp. 615-624
  22. Liu, F. S., Guo, H. S., Smallwood, G. J., Gulder O. L., The chemical effects of carbon dioxide as an additive in an ethylene diffusion flame: Implications for soot and NOx formation,Combustion and Flame, 125(2001), pp. 778-787
  23. Guo, H. S., Smallwood, G. J., A numerical study on the influence of CO2 addition on soot formation in an ethylene/air diffusion flame, Combustion Science and Technology, 180(2008),10-11, pp. 1695-1708
  24. Guo, H., Min, J., Galizzi, C., Escudie´, D., Baillot, F., A numerical study on the effects of CO2/N2/Ar addition on liftoff of a laminar CH4/air diffusion flame, 22nd International Colloquium on the Dynamics of Explosions and Reactive Systems, Minsk, Belarus,2009
  25. Min, J., Baillot, F., Guo, H., Domingues, E., Talbaut, M., Patte-Rouland. B., Impact of CO2, N2 or Ar Diluted in Air on the Length and Lifting Behavior of a Laminar Diffusion Flame, Proceedings of the Combustion Institute,2011, 33, pp.1071-1079
PDF VERSION [DOWNLOAD]
Combustion of hythane diluted with CO2

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence