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

• Ngôn ngữ: eng
• Ký hiệu phân loại: 666.9 Masonry adhesives
• Thông tin xuất bản: Richland, Wash. : Oak Ridge, Tenn. : Pacific Northwest National Laboratory (U.S.) ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2020
• Mô tả vật lý: Size: Article No. 8680 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 262714
• Chủ đề: 1. 09 biomass fuels; 2. Biomass burning; 3. Ecqcl; 4. Pyrolysis; 5. Spectroscopic analyses

Tóm tắt

 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<
 sup>
 -1<
 /sup>
  (4.42 ? 4.79 �m) to measure spectra of CO<
 sub>
 2<
 /sub>
 , H<
 sub>
 2<
 /sub>
 O, and CO. The second was tuned over a range of 920-1150 cm<
 sup>
 -1<
 /sup>
  (8.70 ? 10.9 �m) to measure spectra of ammonia (NH<
 sub>
 3<
 /sub>
 ), ethene (C<
 sub>
 2<
 /sub>
 H<
 sub>
 4<
 /sub>
 ), 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.