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

Author(s): Mark C. Phillips, Tanya L. Myers, Timothy J. Johnson, David R. Weise
Year Published: 2020
Description:

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.

Citation: Phillips, Mark C.; Myers, Tanya L.; Johnson, Timothy J.; Weise, David R. 2020. In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers. Optics Express 28(6):8680. https://doi.org/10.1364/OE.386072
Topic(s): Smoke & Air Quality, Smoke Emissions
Ecosystem(s): None
Document Type: Book or Chapter or Journal Article
NRFSN number: 21509
FRAMES RCS number: 61248
Record updated: Jul 8, 2020