Experimental and modeling study of the effect of elevated pressure on lean high-hydrogen syngas flames

Research output: Contribution to journalArticle


New laminar burning velocity measurements of 85: 15% (by volume) H-2-CO and H-2-N-2 mixtures with O-2-He oxidizer are reported at lean conditions and elevated pressures (1-10 atm). Experiments are conducted using the heat flux method at initial temperature of 298 K. In this technique a near adiabatic flame is stabilized by balancing the heat loss from the flame to the burner with heat gain to the unburnt gas mixture such that no net heat loss to the burner is observed. A new facility was designed for such high pressure burner stabilized flame experiments. The results obtained are compared with five chemical kinetic schemes from literature for syngas mixtures at elevated pressures. Large differences are observed between the kinetic schemes and the experiments which can be attributed to certain key chemical reactions. A study of the kinetics is performed through reaction rate and sensitivity analysis which indicate that a high uncertainty still remains in important reactions that drive the production and consumption of species such as H, HO2 and OH. For lean mixtures the reaction H + O-2(+M) = HO2(+M) contributes significantly to the deviation of models from the experiments. The present analysis in the lean mixture regime suggests the need for further studies in assessment and modification of rate constants for this reaction. (C) 2014 The Combustion Institute. Published by Elsevier Inc. All rights reserved.


  • M. Goswami
  • J. G. H. van Griensven
  • R. J. M. Bastiaans
  • Alexander Konnov
  • L. P. H. de Goey
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics


  • Syngas, Laminar burning velocity, Heat flux method, Elevated pressure
Original languageEnglish
Pages (from-to)655-662
JournalProceedings of the Combustion Institute
Publication statusPublished - 2015
Publication categoryResearch