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Direct observation of aliphatic structures in soot particles produced in low-pressure premixed ethylene flames via online Raman spectroscopy

Le, Kim Cuong LU ; Lefumeux, Christophe ; Bengtsson, Per Erik LU and Pino, Thomas (2019) In Proceedings of the Combustion Institute 37(1). p.869-876
Abstract

Raman spectra of soot particles were monitored in the gaseous flow extracted from the burning regions of two low-pressure premixed ethylene flames, for the first time. The flame conditions were chosen to explore the diversity of soot nanostructure in slightly sooting flames. Evaluation of the Raman spectral parameters revealed that the soot particles exhibited a strongly disordered structure and a large proportion of sp hybridization of the carbon. The appearance of sp carbon chains composing up to 30% of the total carbon content as well as an olefinic component may indicate their important role in soot nucleation and growth in low pressure ethylene flames. Hence, Raman spectroscopy of soot particles in the aerosol phase revealed that... (More)

Raman spectra of soot particles were monitored in the gaseous flow extracted from the burning regions of two low-pressure premixed ethylene flames, for the first time. The flame conditions were chosen to explore the diversity of soot nanostructure in slightly sooting flames. Evaluation of the Raman spectral parameters revealed that the soot particles exhibited a strongly disordered structure and a large proportion of sp hybridization of the carbon. The appearance of sp carbon chains composing up to 30% of the total carbon content as well as an olefinic component may indicate their important role in soot nucleation and growth in low pressure ethylene flames. Hence, Raman spectroscopy of soot particles in the aerosol phase revealed that accretion and cyclization of the aliphatic carbon including sp carbon chains could thus be of importance for the initial soot growth and require more investigation.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aliphatic carbon chains, Nanostructuration, PAH, Raman spectroscopy, Sooting flame
in
Proceedings of the Combustion Institute
volume
37
issue
1
pages
869 - 876
publisher
Elsevier
external identifiers
  • scopus:85054135391
ISSN
1540-7489
DOI
10.1016/j.proci.2018.08.003
language
English
LU publication?
yes
id
502de4c5-e321-4684-b1c0-4d55f36559b5
date added to LUP
2018-10-24 08:51:59
date last changed
2020-02-19 05:09:46
@article{502de4c5-e321-4684-b1c0-4d55f36559b5,
  abstract     = {<p>Raman spectra of soot particles were monitored in the gaseous flow extracted from the burning regions of two low-pressure premixed ethylene flames, for the first time. The flame conditions were chosen to explore the diversity of soot nanostructure in slightly sooting flames. Evaluation of the Raman spectral parameters revealed that the soot particles exhibited a strongly disordered structure and a large proportion of sp hybridization of the carbon. The appearance of sp carbon chains composing up to 30% of the total carbon content as well as an olefinic component may indicate their important role in soot nucleation and growth in low pressure ethylene flames. Hence, Raman spectroscopy of soot particles in the aerosol phase revealed that accretion and cyclization of the aliphatic carbon including sp carbon chains could thus be of importance for the initial soot growth and require more investigation.</p>},
  author       = {Le, Kim Cuong and Lefumeux, Christophe and Bengtsson, Per Erik and Pino, Thomas},
  issn         = {1540-7489},
  language     = {eng},
  number       = {1},
  pages        = {869--876},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute},
  title        = {Direct observation of aliphatic structures in soot particles produced in low-pressure premixed ethylene flames via online Raman spectroscopy},
  url          = {http://dx.doi.org/10.1016/j.proci.2018.08.003},
  doi          = {10.1016/j.proci.2018.08.003},
  volume       = {37},
  year         = {2019},
}