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Soot Concentrations in an Atmospheric Entrained Flow Gasifier with Variations in Fuel and Burner Configuration Studied Using Diode-Laser Extinction Measurements

Simonsson, Johan LU ; Bladh, Henrik LU ; Gullberg, Marcus; Pettersson, Esbjörn; Sepman, Alexey; Ögren, Yngve; Wiinikka, Henrik and Bengtsson, Per Erik LU (2016) In Energy & Fuels 30(3). p.2174-2186
Abstract

Soot concentration measurements were performed using diode-laser extinction in an atmospheric air-blown entrained flow gasifier at two vertical levels. The gasifier was operated at different air-fuel equivalence ratios and with variations in fuel and burner configurations. Two fuels were investigated: wood powder and peat powder. These were burned using two burner configurations, one giving a rotating flow inside the gasifier (swirl), and one where the fuel and air were injected parallel with the gasifier axis (jet). The diode-laser measurements were performed at the wavelength 808 nm from which the soot concentrations were estimated, and additionally at 450 nm in order to gain insight into the spectral dependence of the extinction to... (More)

Soot concentration measurements were performed using diode-laser extinction in an atmospheric air-blown entrained flow gasifier at two vertical levels. The gasifier was operated at different air-fuel equivalence ratios and with variations in fuel and burner configurations. Two fuels were investigated: wood powder and peat powder. These were burned using two burner configurations, one giving a rotating flow inside the gasifier (swirl), and one where the fuel and air were injected parallel with the gasifier axis (jet). The diode-laser measurements were performed at the wavelength 808 nm from which the soot concentrations were estimated, and additionally at 450 nm in order to gain insight into the spectral dependence of the extinction to estimate measurement quality. Additional diagnostic techniques were used, such as an electrical low-pressure impactor (ELPI) for soot size distributions and gas chromatography for species concentration measurements. The results show that wood powder produces higher soot concentrations than peat powder, especially at lower air-fuel equivalence ratios. Furthermore, the burner configuration had in general much less impact than the choice of fuel on the soot concentration.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Energy & Fuels
volume
30
issue
3
pages
13 pages
publisher
The American Chemical Society
external identifiers
  • Scopus:84962297761
ISSN
0887-0624
DOI
10.1021/acs.energyfuels.5b02561
language
English
LU publication?
yes
id
ec6b323f-abe4-4e1e-a048-afa65c55ce79
date added to LUP
2016-07-11 11:27:54
date last changed
2016-07-11 11:27:54
@misc{ec6b323f-abe4-4e1e-a048-afa65c55ce79,
  abstract     = {<p>Soot concentration measurements were performed using diode-laser extinction in an atmospheric air-blown entrained flow gasifier at two vertical levels. The gasifier was operated at different air-fuel equivalence ratios and with variations in fuel and burner configurations. Two fuels were investigated: wood powder and peat powder. These were burned using two burner configurations, one giving a rotating flow inside the gasifier (swirl), and one where the fuel and air were injected parallel with the gasifier axis (jet). The diode-laser measurements were performed at the wavelength 808 nm from which the soot concentrations were estimated, and additionally at 450 nm in order to gain insight into the spectral dependence of the extinction to estimate measurement quality. Additional diagnostic techniques were used, such as an electrical low-pressure impactor (ELPI) for soot size distributions and gas chromatography for species concentration measurements. The results show that wood powder produces higher soot concentrations than peat powder, especially at lower air-fuel equivalence ratios. Furthermore, the burner configuration had in general much less impact than the choice of fuel on the soot concentration.</p>},
  author       = {Simonsson, Johan and Bladh, Henrik and Gullberg, Marcus and Pettersson, Esbjörn and Sepman, Alexey and Ögren, Yngve and Wiinikka, Henrik and Bengtsson, Per Erik},
  issn         = {0887-0624},
  language     = {eng},
  month        = {03},
  number       = {3},
  pages        = {2174--2186},
  publisher    = {ARRAY(0x988e740)},
  series       = {Energy & Fuels},
  title        = {Soot Concentrations in an Atmospheric Entrained Flow Gasifier with Variations in Fuel and Burner Configuration Studied Using Diode-Laser Extinction Measurements},
  url          = {http://dx.doi.org/10.1021/acs.energyfuels.5b02561},
  volume       = {30},
  year         = {2016},
}