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Optical and mass spectrometric study of the pyrolysis gas of wood particles

Brackmann, Christian LU ; Aldén, Marcus LU ; Bengtsson, Per-Erik LU ; Davidsson, K O and Pettersson, Jan B C (2003) In Applied Spectroscopy 57(2). p.216-222
Abstract
A detailed experimental investigation has been made of the pyrolysis-the first step in biomass combustion-of single birchwood particles. In addition to mass spectrometric and gravimetric analysis, the pyrolysis volatiles were characterized by different optical techniques. Absorption measurements showed a nearly featureless absorption in the ultraviolet spectral region with a continuously stronger absorption for shorter wavelengths. Using different excitation wavelengths, laser-induced fluorescence measurements revealed generally broad spectra in the spectral region from 300-500 nm, which are characteristic spectral signatures for larger hydrocarbons. The optical data were monitored at different times in the pyrolysis process of the... (More)
A detailed experimental investigation has been made of the pyrolysis-the first step in biomass combustion-of single birchwood particles. In addition to mass spectrometric and gravimetric analysis, the pyrolysis volatiles were characterized by different optical techniques. Absorption measurements showed a nearly featureless absorption in the ultraviolet spectral region with a continuously stronger absorption for shorter wavelengths. Using different excitation wavelengths, laser-induced fluorescence measurements revealed generally broad spectra in the spectral region from 300-500 nm, which are characteristic spectral signatures for larger hydrocarbons. The optical data were monitored at different times in the pyrolysis process of the particles and compared with the results from the mass spectrometric and gravimetric analysis. The sensitivity of the optical techniques for differentiation between specific molecules was rather low, although formaldehyde could be observed both in absorption and fluorescence spectra. Laser-induced fluorescence measurements were also made for two-dimensional visualization of the pyrolysis volatiles; emitted from heated birchwood particles, indicating much higher flows along the fiber direction than across. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
spectrometry, mass, laser-induced fluorescence, wood pyrolysis, optical spectroscopy
in
Applied Spectroscopy
volume
57
issue
2
pages
216 - 222
publisher
Society for Applied Spectroscopy
external identifiers
  • wos:000184358000015
  • pmid:14610960
  • scopus:0037306086
ISSN
1943-3530
DOI
10.1366/000370203321535141
language
English
LU publication?
yes
id
49f3bace-a76c-4121-874f-ba3e5e8ef244 (old id 305784)
date added to LUP
2007-08-27 09:30:48
date last changed
2017-07-02 03:40:02
@article{49f3bace-a76c-4121-874f-ba3e5e8ef244,
  abstract     = {A detailed experimental investigation has been made of the pyrolysis-the first step in biomass combustion-of single birchwood particles. In addition to mass spectrometric and gravimetric analysis, the pyrolysis volatiles were characterized by different optical techniques. Absorption measurements showed a nearly featureless absorption in the ultraviolet spectral region with a continuously stronger absorption for shorter wavelengths. Using different excitation wavelengths, laser-induced fluorescence measurements revealed generally broad spectra in the spectral region from 300-500 nm, which are characteristic spectral signatures for larger hydrocarbons. The optical data were monitored at different times in the pyrolysis process of the particles and compared with the results from the mass spectrometric and gravimetric analysis. The sensitivity of the optical techniques for differentiation between specific molecules was rather low, although formaldehyde could be observed both in absorption and fluorescence spectra. Laser-induced fluorescence measurements were also made for two-dimensional visualization of the pyrolysis volatiles; emitted from heated birchwood particles, indicating much higher flows along the fiber direction than across.},
  author       = {Brackmann, Christian and Aldén, Marcus and Bengtsson, Per-Erik and Davidsson, K O and Pettersson, Jan B C},
  issn         = {1943-3530},
  keyword      = {spectrometry,mass,laser-induced fluorescence,wood pyrolysis,optical spectroscopy},
  language     = {eng},
  number       = {2},
  pages        = {216--222},
  publisher    = {Society for Applied Spectroscopy},
  series       = {Applied Spectroscopy},
  title        = {Optical and mass spectrometric study of the pyrolysis gas of wood particles},
  url          = {http://dx.doi.org/10.1366/000370203321535141},
  volume       = {57},
  year         = {2003},
}