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Simultaneous quantitative detection of hcn and c2h2 in combustion environment using tdlas

Weng, Wubin LU ; Aldén, Marcus LU and Li, Zhongshan LU (2021) In Processes 9(11).
Abstract

Emission of nitrogen oxides (NOx ) and soot particles during the combustion of biomass fuels and municipal solid waste is a major environmental issue. Hydrogen cyanide (HCN) and acetylene (C2H2 ) are important precursors of NOx and soot particles, respectively. In the current work, infrared tunable diode laser absorption spectroscopy (IR-TDLAS), as a non-intrusive in situ technique, was applied to quantitatively measure HCN and C2H2 in a combustion environment. The P(11e) line of the first overtone vibrational band v1 of HCN at 6484.78 cm−1 and the P(27e) line of the v1 + v3 combination band of C2H2 at... (More)

Emission of nitrogen oxides (NOx ) and soot particles during the combustion of biomass fuels and municipal solid waste is a major environmental issue. Hydrogen cyanide (HCN) and acetylene (C2H2 ) are important precursors of NOx and soot particles, respectively. In the current work, infrared tunable diode laser absorption spectroscopy (IR-TDLAS), as a non-intrusive in situ technique, was applied to quantitatively measure HCN and C2H2 in a combustion environment. The P(11e) line of the first overtone vibrational band v1 of HCN at 6484.78 cm−1 and the P(27e) line of the v1 + v3 combination band of C2H2 at 6484.03 cm−1 were selected. However, the infrared absorption of the ubiquitous water vapor in the combustion environment brings great uncertainty to the measurement. To obtain accurate temperature-dependent water spectra between 6483.8 and 6485.8 cm−1, a homogenous hot gas environment with controllable temperatures varying from 1100 to 1950 K provided by a laminar flame was employed to perform systematic IR-TDLAS measurements. By fitting the obtained water spectra, water interference to the HCN and C2H2 measurement was sufficiently mitigated and the concentrations of HCN and C2H2 were obtained. The technique was applied to simultaneously measure the temporally resolved release of HCN and C2H2 over burning nylon 66 strips in a hot oxidizing environment of 1790 K.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Acetylene, Biomass/waste, Combus-tion/gasification, Hot water interference, Hydrogen cyanide, Tunable diode laser absorption spectroscopy
in
Processes
volume
9
issue
11
article number
2033
publisher
MDPI AG
external identifiers
  • scopus:85119611575
ISSN
2227-9717
DOI
10.3390/pr9112033
language
English
LU publication?
yes
id
9ae86fd4-1cec-4677-972b-549f11f57b16
date added to LUP
2021-12-03 14:08:55
date last changed
2023-11-09 01:05:45
@article{9ae86fd4-1cec-4677-972b-549f11f57b16,
  abstract     = {{<p>Emission of nitrogen oxides (NO<sub>x</sub> ) and soot particles during the combustion of biomass fuels and municipal solid waste is a major environmental issue. Hydrogen cyanide (HCN) and acetylene (C<sub>2</sub>H<sub>2</sub> ) are important precursors of NO<sub>x</sub> and soot particles, respectively. In the current work, infrared tunable diode laser absorption spectroscopy (IR-TDLAS), as a non-intrusive in situ technique, was applied to quantitatively measure HCN and C<sub>2</sub>H<sub>2</sub> in a combustion environment. The P(11e) line of the first overtone vibrational band v<sub>1</sub> of HCN at 6484.78 cm<sup>−1</sup> and the P(27e) line of the v<sub>1</sub> + v<sub>3</sub> combination band of C<sub>2</sub>H<sub>2</sub> at 6484.03 cm<sup>−1</sup> were selected. However, the infrared absorption of the ubiquitous water vapor in the combustion environment brings great uncertainty to the measurement. To obtain accurate temperature-dependent water spectra between 6483.8 and 6485.8 cm<sup>−1</sup>, a homogenous hot gas environment with controllable temperatures varying from 1100 to 1950 K provided by a laminar flame was employed to perform systematic IR-TDLAS measurements. By fitting the obtained water spectra, water interference to the HCN and C<sub>2</sub>H<sub>2</sub> measurement was sufficiently mitigated and the concentrations of HCN and C<sub>2</sub>H<sub>2</sub> were obtained. The technique was applied to simultaneously measure the temporally resolved release of HCN and C<sub>2</sub>H<sub>2</sub> over burning nylon 66 strips in a hot oxidizing environment of 1790 K.</p>}},
  author       = {{Weng, Wubin and Aldén, Marcus and Li, Zhongshan}},
  issn         = {{2227-9717}},
  keywords     = {{Acetylene; Biomass/waste; Combus-tion/gasification; Hot water interference; Hydrogen cyanide; Tunable diode laser absorption spectroscopy}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{MDPI AG}},
  series       = {{Processes}},
  title        = {{Simultaneous quantitative detection of hcn and c<sub>2</sub>h<sub>2</sub> in combustion environment using tdlas}},
  url          = {{https://lup.lub.lu.se/search/files/119436510/processes_09_02033.pdf}},
  doi          = {{10.3390/pr9112033}},
  volume       = {{9}},
  year         = {{2021}},
}