Measurement of CO Concentration in Combustion Field Based on Mid-Infrared Absorption Spectroscopy

Peng Yuquan; Kan Ruifeng; Xu Zhenyu; Xia Huihui; Nie Wei; Zhang Buqiang

doi:10.3788/CJL201845.0911010

Chinese Journal of Lasers, Volume. 45, Issue 9, 911010(2018)

Measurement of CO Concentration in Combustion Field Based on Mid-Infrared Absorption Spectroscopy

Peng Yuquan^1,2, Kan Ruifeng^1、*, Xu Zhenyu¹, Xia Huihui¹, Nie Wei^1,2, and Zhang Buqiang^1,2

Author Affiliations

¹[in Chinese]

²[in Chinese]

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Figures & Tables(10)

Fig. 1. Spectral line strength or spectral line strength ratio vary with temperature

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Fig. 2. Simulation curves of absorbance (p=0.1 MPa, x=1‰, L=6 cm)

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Fig. 3. Schematic of TLAS measurement system for flat flame burner

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Fig. 4. Results of TLAS temperature measurement in high temperature tube furnace

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$Comparison between measured volume fraction and reference volume fractoin$

Fig. 5. Comparison between measured volume fraction and reference volume fractoin

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Fig. 6. Waveforms of direct absorption signal and etalon interference signal

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Fig. 7. CO concentration varies with the equivalent ratio at different height above the furnace surface

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$(a) Temperature vary with the equivalent ratio at different heights above the furnace surface; (b) volume fraction of CO vary with the equivalent ratio at different heights above the furnace surface$

Fig. 8. (a) Temperature vary with the equivalent ratio at different heights above the furnace surface; (b) volume fraction of CO vary with the equivalent ratio at different heights above the furnace surface

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Table 1. Spectral lines parameters for temperature and CO concentration measurement (296 K)
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Table 1. Spectral lines parameters for temperature and CO concentration measurement (296 K)
Molecule v₀ /cm^-1 E″ /cm^-1 S(T) /(cm^-2·Pa^-1)
H₂O 7154.35 1789.04 3.71×10^-9
H₂O 7467.77 2551.48 1.27×10^-10
CO 2059.91 806.41 8.75×10^-6

Table 2. Flow rate of air and fuel at different equivalence ratio in CH4/air flat flame furnace
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Table 2. Flow rate of air and fuel at different equivalence ratio in CH4/air flat flame furnace
Equivalenceratio Flow velocity ofair /(L·min^-1) Flow velocity ofCH₄ /(L·min^-1)
0.7 13.26 0.975
0.8 13.11 1.100
0.9 12.99 1.230
1.0 12.87 1.350
1.1 12.75 1.470
1.2 12.63 1.590
1.3 12.51 1.700

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Peng Yuquan, Kan Ruifeng, Xu Zhenyu, Xia Huihui, Nie Wei, Zhang Buqiang. Measurement of CO Concentration in Combustion Field Based on Mid-Infrared Absorption Spectroscopy[J]. Chinese Journal of Lasers, 2018, 45(9): 911010

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Paper Information

Special Issue:

Received: Mar. 7, 2018

Accepted: --

Published Online: Sep. 8, 2018

The Author Email: Ruifeng Kan (kanruifeng@aiofm.ac.cn)

DOI:10.3788/CJL201845.0911010

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Spectral lines parameters for temperature and CO concentration measurement (296 K)

Table 1. Spectral lines parameters for temperature and CO concentration measurement (296 K)

Table 2. Flow rate of air and fuel at different equivalence ratio in CH4/air flat flame furnace

Table 2. Flow rate of air and fuel at different equivalence ratio in CH4/air flat flame furnace