Determination of liquefied petroleum flame temperatures using emission spectroscopy

Detalhes bibliográficos
Autor(a) principal: Carinhana Jr.,Dermeval
Data de Publicação: 2008
Outros Autores: Barreta,Luiz G., Rocha,Cláudio J., Santos,Alberto M. dos, Bertran,Celso A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000700015
Resumo: Emission spectroscopy was used in the temperature determination of LPG (liquefied petroleum gas) premixed flames. Natural emission of CH* radicals was investigated in flames under three different burning conditions: fuel/oxydizer stoichiometric ratio, fuel excess (rich flame), and oxidizer excess (lean flame). An average value of 2845 ± 70 K was obtained for CH* rotational temperature in the set up used in the experiments. This value did not show significant change with the type of flame analyzed and it is compatible with the calculated adiabatic flame temperatures of the investigated systems. This temperature value also agrees with that determined by an indirect measurement, using the sodium line reversal method, which is independent from the radical natural emission and well established in literature. Vibrational temperatures of ca. 4600 K were calculated, indicating that the CH* lifetime is insufficient for the establishment of an equilibrium state between the rotational and vibrational modes.
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spelling Determination of liquefied petroleum flame temperatures using emission spectroscopychemiluminescencepremixed flamesBoltzmann distributioncombustion diagnosticsEmission spectroscopy was used in the temperature determination of LPG (liquefied petroleum gas) premixed flames. Natural emission of CH* radicals was investigated in flames under three different burning conditions: fuel/oxydizer stoichiometric ratio, fuel excess (rich flame), and oxidizer excess (lean flame). An average value of 2845 ± 70 K was obtained for CH* rotational temperature in the set up used in the experiments. This value did not show significant change with the type of flame analyzed and it is compatible with the calculated adiabatic flame temperatures of the investigated systems. This temperature value also agrees with that determined by an indirect measurement, using the sodium line reversal method, which is independent from the radical natural emission and well established in literature. Vibrational temperatures of ca. 4600 K were calculated, indicating that the CH* lifetime is insufficient for the establishment of an equilibrium state between the rotational and vibrational modes.Sociedade Brasileira de Química2008-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000700015Journal of the Brazilian Chemical Society v.19 n.7 2008reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532008000700015info:eu-repo/semantics/openAccessCarinhana Jr.,DermevalBarreta,Luiz G.Rocha,Cláudio J.Santos,Alberto M. dosBertran,Celso A.eng2017-05-05T00:00:00Zoai:scielo:S0103-50532008000700015Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2017-05-05T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Determination of liquefied petroleum flame temperatures using emission spectroscopy
title Determination of liquefied petroleum flame temperatures using emission spectroscopy
spellingShingle Determination of liquefied petroleum flame temperatures using emission spectroscopy
Carinhana Jr.,Dermeval
chemiluminescence
premixed flames
Boltzmann distribution
combustion diagnostics
title_short Determination of liquefied petroleum flame temperatures using emission spectroscopy
title_full Determination of liquefied petroleum flame temperatures using emission spectroscopy
title_fullStr Determination of liquefied petroleum flame temperatures using emission spectroscopy
title_full_unstemmed Determination of liquefied petroleum flame temperatures using emission spectroscopy
title_sort Determination of liquefied petroleum flame temperatures using emission spectroscopy
author Carinhana Jr.,Dermeval
author_facet Carinhana Jr.,Dermeval
Barreta,Luiz G.
Rocha,Cláudio J.
Santos,Alberto M. dos
Bertran,Celso A.
author_role author
author2 Barreta,Luiz G.
Rocha,Cláudio J.
Santos,Alberto M. dos
Bertran,Celso A.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Carinhana Jr.,Dermeval
Barreta,Luiz G.
Rocha,Cláudio J.
Santos,Alberto M. dos
Bertran,Celso A.
dc.subject.por.fl_str_mv chemiluminescence
premixed flames
Boltzmann distribution
combustion diagnostics
topic chemiluminescence
premixed flames
Boltzmann distribution
combustion diagnostics
description Emission spectroscopy was used in the temperature determination of LPG (liquefied petroleum gas) premixed flames. Natural emission of CH* radicals was investigated in flames under three different burning conditions: fuel/oxydizer stoichiometric ratio, fuel excess (rich flame), and oxidizer excess (lean flame). An average value of 2845 ± 70 K was obtained for CH* rotational temperature in the set up used in the experiments. This value did not show significant change with the type of flame analyzed and it is compatible with the calculated adiabatic flame temperatures of the investigated systems. This temperature value also agrees with that determined by an indirect measurement, using the sodium line reversal method, which is independent from the radical natural emission and well established in literature. Vibrational temperatures of ca. 4600 K were calculated, indicating that the CH* lifetime is insufficient for the establishment of an equilibrium state between the rotational and vibrational modes.
publishDate 2008
dc.date.none.fl_str_mv 2008-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000700015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000700015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50532008000700015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.19 n.7 2008
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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