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Title: In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers

Abstract

Broadband high-speed absorption spectroscopy using swept-wavelength external cavity quantum cascade lasers (ECQCLs) is applied to measure multiple pyrolysis and combustion gases in biomass burning experiments. Two broadly-tunable swept-ECQCL systems were used, with the first tuned over a range of 2089-2262 cm-1 (4.42 – 4.79 µm) to measure spectra of CO2, H2O, and CO. The second was tuned over a range of 920-1150 cm-1 (8.70 – 10.9 µm) to measure spectra of ammonia (NH3), ethene (C2H4), and methanol (MeOH). Absorption spectra were measured continuously at a 100 Hz rate throughout the burn process, including inhomogeneous flame regions, and analyzed to determine time-resolved gas concentrations and temperature. The results provide in-situ, dynamic information regarding gas-phase species as they are generated, close to the biomass fuel source.

Authors:
 [1];  [2];  [2];  [3]
  1. University of Arizona
  2. BATTELLE (PACIFIC NW LAB)
  3. Forest Fire Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1604894
Report Number(s):
[PNNL-SA-150086]
Grant/Contract Number:  
[AC05-76RL01830]
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
[ Journal Volume: 28; Journal Issue: 6]
Country of Publication:
United States
Language:
English
Subject:
Pyrolysis, Biomass burning, ECQCL, spectroscopic analyses

Citation Formats

Phillips, Mark C., Myers, Tanya L., Johnson, Timothy J., and Weise, David. In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers. United States: N. p., 2020. Web. doi:10.1364/OE.386072.
Phillips, Mark C., Myers, Tanya L., Johnson, Timothy J., & Weise, David. In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers. United States. doi:10.1364/OE.386072.
Phillips, Mark C., Myers, Tanya L., Johnson, Timothy J., and Weise, David. Sun . "In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers". United States. doi:10.1364/OE.386072.
@article{osti_1604894,
title = {In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers},
author = {Phillips, Mark C. and Myers, Tanya L. and Johnson, Timothy J. and Weise, David},
abstractNote = {Broadband high-speed absorption spectroscopy using swept-wavelength external cavity quantum cascade lasers (ECQCLs) is applied to measure multiple pyrolysis and combustion gases in biomass burning experiments. Two broadly-tunable swept-ECQCL systems were used, with the first tuned over a range of 2089-2262 cm-1 (4.42 – 4.79 µm) to measure spectra of CO2, H2O, and CO. The second was tuned over a range of 920-1150 cm-1 (8.70 – 10.9 µm) to measure spectra of ammonia (NH3), ethene (C2H4), and methanol (MeOH). Absorption spectra were measured continuously at a 100 Hz rate throughout the burn process, including inhomogeneous flame regions, and analyzed to determine time-resolved gas concentrations and temperature. The results provide in-situ, dynamic information regarding gas-phase species as they are generated, close to the biomass fuel source.},
doi = {10.1364/OE.386072},
journal = {Optics Express},
number = [6],
volume = [28],
place = {United States},
year = {2020},
month = {3}
}

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