Mid-infrared PS and LIF detection of CH4 and C2H 6 in cold flows and flames at atmospheric pressure
(2005) In Proceedings of the Combustion Institute 30(1). p.1629-1636- Abstract
- Mid-infrared polarization spectroscopy (IRPS) and laser-induced fluorescence (IRLIF) have been applied for detection of methane and ethane in atmospheric pressure cold flows and flames. Lines belonging to the asymmetric C-H stretching vibration bands v<sub>3</sub> and v<sub>7</sub> for methane and ethane, respectively, were probed with a tunable infrared laser beam at about 3.4 μm, which was obtained from difference frequency generation in a LiNbO<sub>3</sub> crystal pumped by a dye-laser beam and a Nd:YAG fundamental laser beam. The dependence of IRPS and IRLIF signal of CH<sub>4</sub> on different buffer gases, including He, Ar, N<sub>2</sub>, and CO<sub>2</sub> was... (More)
- Mid-infrared polarization spectroscopy (IRPS) and laser-induced fluorescence (IRLIF) have been applied for detection of methane and ethane in atmospheric pressure cold flows and flames. Lines belonging to the asymmetric C-H stretching vibration bands v<sub>3</sub> and v<sub>7</sub> for methane and ethane, respectively, were probed with a tunable infrared laser beam at about 3.4 μm, which was obtained from difference frequency generation in a LiNbO<sub>3</sub> crystal pumped by a dye-laser beam and a Nd:YAG fundamental laser beam. The dependence of IRPS and IRLIF signal of CH<sub>4</sub> on different buffer gases, including He, Ar, N<sub>2</sub>, and CO<sub>2</sub> was investigated. Simultaneous measurements of IRPS and IRLIF signals allowed a direct comparison of the two techniques, and IRPS was found to be superior in detection sensitivity and background discrimination. IRPS excitation scans of a methane and ethane mixture diluted in Ar were also performed in a jet at ambient pressure and temperature. Lines in the spectrum belonging to methane and ethane were fully recognized and assigned. From the ethane lines in the IRPS excitation spectrum, a detection limit of 50 ppm was conservatively estimated, and this indicates that IRPS is a promising sensitive technique for hydrocarbon identification and detection. Finally, CH<sub>4</sub> IRPS detection in a CH<sub>4</sub>/H<sub>2</sub>/air premixed flat flame was demonstrated, with spatially resolved IRPS CH<sub>4</sub> measurements along different heights in the flame. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/616252
- author
- Li, Zhongshan LU ; Rupinski, M ; Zetterberg, Johan LU and Aldén, Marcus LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Infrared polarization spectroscopy (IRPS), Laser-induced fluorescence, Excitation spectrum, Laser combustion diagnostics
- in
- Proceedings of the Combustion Institute
- volume
- 30
- issue
- 1
- pages
- 1629 - 1636
- publisher
- Elsevier
- external identifiers
-
- wos:000229944200177
- scopus:84964228129
- ISSN
- 1540-7489
- DOI
- 10.1016/j.proci.2004.08.124
- language
- English
- LU publication?
- yes
- id
- 27cf3b62-2be1-40b2-b2e5-aca4c3faa235 (old id 616252)
- date added to LUP
- 2016-04-01 11:38:48
- date last changed
- 2022-04-28 17:55:12
@article{27cf3b62-2be1-40b2-b2e5-aca4c3faa235, abstract = {{Mid-infrared polarization spectroscopy (IRPS) and laser-induced fluorescence (IRLIF) have been applied for detection of methane and ethane in atmospheric pressure cold flows and flames. Lines belonging to the asymmetric C-H stretching vibration bands v<sub>3</sub> and v<sub>7</sub> for methane and ethane, respectively, were probed with a tunable infrared laser beam at about 3.4 μm, which was obtained from difference frequency generation in a LiNbO<sub>3</sub> crystal pumped by a dye-laser beam and a Nd:YAG fundamental laser beam. The dependence of IRPS and IRLIF signal of CH<sub>4</sub> on different buffer gases, including He, Ar, N<sub>2</sub>, and CO<sub>2</sub> was investigated. Simultaneous measurements of IRPS and IRLIF signals allowed a direct comparison of the two techniques, and IRPS was found to be superior in detection sensitivity and background discrimination. IRPS excitation scans of a methane and ethane mixture diluted in Ar were also performed in a jet at ambient pressure and temperature. Lines in the spectrum belonging to methane and ethane were fully recognized and assigned. From the ethane lines in the IRPS excitation spectrum, a detection limit of 50 ppm was conservatively estimated, and this indicates that IRPS is a promising sensitive technique for hydrocarbon identification and detection. Finally, CH<sub>4</sub> IRPS detection in a CH<sub>4</sub>/H<sub>2</sub>/air premixed flat flame was demonstrated, with spatially resolved IRPS CH<sub>4</sub> measurements along different heights in the flame.}}, author = {{Li, Zhongshan and Rupinski, M and Zetterberg, Johan and Aldén, Marcus}}, issn = {{1540-7489}}, keywords = {{Infrared polarization spectroscopy (IRPS); Laser-induced fluorescence; Excitation spectrum; Laser combustion diagnostics}}, language = {{eng}}, number = {{1}}, pages = {{1629--1636}}, publisher = {{Elsevier}}, series = {{Proceedings of the Combustion Institute}}, title = {{Mid-infrared PS and LIF detection of CH<sub>4</sub> and C<sub>2</sub>H <sub>6</sub> in cold flows and flames at atmospheric pressure}}, url = {{http://dx.doi.org/10.1016/j.proci.2004.08.124}}, doi = {{10.1016/j.proci.2004.08.124}}, volume = {{30}}, year = {{2005}}, }