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Soot particles from the combustion of hydrocarbon fuels are the main source of the air fine particles and they are also an important factor of reducing the combustion efficiency. As one of their major precursor, acetylene (C2H2) plays an important role in forming soot. So the simultaneous detecting of soot particle and C2H2 is significant in studying the mechanism of the soot formation. In this work, a sensor for the simultaneous detecting of soot particle and C2H2 is developed by using a single DFB diode laser with a wavelength near 1540 nm. The extinction spectrum near the proper C2H2 line at 6490.02 cm–1 is used to infer the mass concentration of particles and the C2H2 concentration. The performance of the sensor is confirmed in a home-made heated static cell which can provide well controlled gaseous environment and particulate environment. The measured mass concentration of particles and the C2H2 concentration are within 2.73% and 5.17% of the expected values over the full temperature range of 500–1000 K, respectively. All the measurements show the potential application of the sensor in the simultaneous detecting of soot particle and C2H2 at elevated temperature.
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Keywords:
- tunable diode laser absorption spectrum /
- extinction spectrum /
- gas concentration /
- particle mass concentration
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图 1 在P = 1 atm, T = 1000 K条件下, C2H2目标谱线及其附近的C2H2, H2O, CO2, CO吸收光谱分布模拟图
Figure 1. The simulated direct absorption spectrum of C2H2, CO2 and H2O in the region of 6489.3–6490.5 cm–1 with the condition of P = 1 atm, T = 1000 K.
图 2 实验系统示意图
Figure 2. Schematic diagram of experimental system.
图 3 (a) 气体吸收和颗粒物消光信号; (b) 信号处理
Figure 3. (a) Signal of gas absorption and particle extinction; (b) signal processing.
图 4 1000 K温度下测得的不同浓度的C2H2直接吸收光谱信号
Figure 4. Different concentrations of C2H2 measured at 1000 K directly absorb spectral signals.
图 5 各温度下光谱探测的C2H2浓度与配气时所记录的浓度对比 (a)(b) 分别为有无颗粒物的测量环境
Figure 5. Comparison of the measured and known C2H2 concentration detected in the environment with (a) and without (b) particles.
图 6 1000 K温度下4000 ppm浓度样品中C2H2目标谱线的透过率谱
Figure 6. Transmission spectra of the selected C2H2 line at 1000 K.
图 7 1000 K温度下颗粒物质量浓度与参考值对比
Figure 7. Comparison of measured and known particle mass concentration at 1000 K.
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[1] Fawole O G, Cai X M, MacKenzie A R 2016 Environ. Pollut 216 182
Google Scholar
[2] Bergstrom R W, Russell P B, Hignett P 2002 J. Atmos. Sci 59 567
Google Scholar
[3] Hai W, Frenklach M A 1997 Combust. Flame 110 173
Google Scholar
[4] Richter H, Howard J B 2000 Prog. Energy Combust. Sci 26 565
Google Scholar
[5] 刘文清, 陈臻懿, 刘建国 2019 环境科学研究 10 1645
Liu W Q, Chen Z Y, Liu J G 2019 J. Environ. Sci. 10 1645
[6] Hanson R K, Spearrin R M, Goldenstein C S 2016 Spectroscopy and Optical Diagnostics for Gases (Switzerland: Springer International Publishing) pp1–107
[7] Patimisco P, Sampaolo A, Dong L, Tittel F K, Spagnolo V 2018 Appl. Phys. Rev 5 011106
Google Scholar
[8] 贾梦源, 赵刚, 侯佳佳, 谭巍, 邱晓东, 马维光, 张雷, 董磊, 尹王保, 肖连团, 贾锁堂 2016 物理学报 65 128701
Google Scholar
Jia M Y, Zhao G, Hou J J, Tan W, Qiu X D, Ma W G, Zhang L, Dong L, Yin W B, Xiao L T, Jia S T 2016 Acta. Phys. Sin. 65 128701
Google Scholar
[9] Liu K, Wang L, Tan T, Wang G S, Zhang W J, Chen W D, Gao X M 2015 Sens. Actuators B Chem 220 1000
Google Scholar
[10] Liu Z W, Zheng C T, Zhang T Y, Li Y F, Ren Q, Chen C, Ye W L, Zhang Y, Wang Y D, Tittel F K 2020 Anal. Chem 92 8178
Google Scholar
[11] Deng B T, Sima C, Xiao Y F, Wang X F, Ai Y, Li T L, Lu P, Liu D M 2022 Opt. Lasers. Eng 151 106906
Google Scholar
[12] Bürkle S, Biondo L, Ding C P, Honza R, Wagner S 2018 Flow. Turbul. Combust 101 139
Google Scholar
[13] He D, Peng Z, Ding Y 2021 Fuel 284 118980
Google Scholar
[14] 张亮, 刘建国, 阚瑞峰, 刘文清, 张玉钧, 许振宇, 陈军 2012 物理学报 63 034214
Google Scholar
Zhang L, Liu J G, Kan R G, Liu W Q, Zhang Y J, Xu Z Y, Chen J 2012 Acta. Phys. Sin. 63 034214
Google Scholar
[15] Klingbeil A E, Jeffries J B, Hanson R K 2006 Meas. Sci. Technol 17 1950
Google Scholar
[16] Liu N W, Xu L G, Zhou S, He T B, Zhang L, Wu D M, Li J S 2019 J. Quant. Spectrosc. Ra 236 106587
Google Scholar
[17] Nasim H, Jamil Y 2014 Opt. Laser Technol 56 211
Google Scholar
[18] Qiao S D, Ma Y F, Patimisco P, Sampaolo A, He Y, Lang Z T, Tittel F K, Spagnolo V 2021 Opt. Lett 46 977
Google Scholar
[19] Giubileo G 2002 Proceedings of SPIE-The International Society for Optical Engineering 4762 318
[20] Skrotzki J, Habig J C, Ebert V 2014 Appl. Phys. B 116 393
Google Scholar
[21] Wang F, Cen K F, Li N, Huang Q X, Chao X, Yan J H, Chi Y 2010 Flow Meas. Instrum 21 382
Google Scholar
[22] Wang F, Wu Q, Huang Q, Zhang H, Yan J, Cen K 2015 Opt. Commun 346 53
Google Scholar
[23] Lancaster D G, Richter D, Curl R F, Tittel F K, Goldberg I, Koplow J 1999 Opt. Lett 24 1744
Google Scholar
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