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

Goswami, M.; van Griensven, J. G. H.; Bastiaans, R. J. M.; Konnov, Alexander LU and de Goey, L. P. H. (2015) In Proceedings of the Combustion Institute 35. p.655-662
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Syngas, Laminar burning velocity, Heat flux method, Elevated pressure
in
Proceedings of the Combustion Institute
volume
35
pages
655 - 662
publisher
Elsevier
external identifiers
  • wos:000348047500064
  • scopus:84937643001
ISSN
1540-7489
DOI
10.1016/j.proci.2014.05.057
language
English
LU publication?
yes
id
3432b98d-485f-4da6-ac96-4b6a77ca551c (old id 5204232)
date added to LUP
2015-03-25 14:50:14
date last changed
2017-09-17 03:11:41
@article{3432b98d-485f-4da6-ac96-4b6a77ca551c,
  abstract     = {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.},
  author       = {Goswami, M. and van Griensven, J. G. H. and Bastiaans, R. J. M. and Konnov, Alexander and de Goey, L. P. H.},
  issn         = {1540-7489},
  keyword      = {Syngas,Laminar burning velocity,Heat flux method,Elevated pressure},
  language     = {eng},
  pages        = {655--662},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {Experimental and modeling study of the effect of elevated pressure on lean high-hydrogen syngas flames},
  url          = {http://dx.doi.org/10.1016/j.proci.2014.05.057},
  volume       = {35},
  year         = {2015},
}