Document


Title

In-situ measurement of pyrolysis and combustion gases from biomass burning using swept wavelength external cavity quantum cascade lasers
Document Type: Journal Article
Author(s): Mark C. Phillips; Tanya L. Myers; Timothy J. Johnson; David R. Weise
Publication Year: 2020

Cataloging Information

Keyword(s):
  • biomass burning
  • combustion gases
  • external cavity quantum cascade lasers
  • laboratory fires
  • pyrolysis
Record Maintained By:
Record Last Modified: May 22, 2020
FRAMES Record Number: 61248

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.

Online Link(s):
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.