Measurements of CO2 Concentration at High Temperature and Pressure Environments Using Tunable Diode Laser Absorption Spectroscopy
CAI Ting-dong1, 2, GAO Guang-zhen1, WANG Min-rui1, WANG Gui-shi2, GAO Xiao-ming2
1. College of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China 2. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract：The present research was planned to develop a method for species concentration measurements under high temperature and pressure environments. The characteristics of CO2 spectrum at high temperature and pressure were studied at first. Based on the research above, tunable diode-laser absorption of CO2 near 2.0 μm incorporating fixed-wavelength modulation spectroscopy with second-harmonic detection was used to provide a method for sensitive and accurate measurements of gas temperature and CO2 concentration at high temperature and pressure. Measurements were performed in a well-controlled high temperature and pressure static cell. The results show that the average error of the CO2 concentration measurements at 5 atm, 500 K and 10 atm, 1000 K is 4.49%. All measurements show the accuracy and potential utility of the method for high temperature and pressure diagnostics.
Key words：Tunable diode laser absorption spectroscopy (TDLAS);Wavelength modulation spectroscopy;High temperature and pressure;CO2 concentration
蔡廷栋1,2，高光珍1，王敏锐1，王贵师2，高晓明2 . 高温高压下基于TDLAS的二氧化碳浓度测量方法研究 [J]. 光谱学与光谱分析, 2014, 34(07): 1769-1773.
CAI Ting-dong1, 2, GAO Guang-zhen1, WANG Min-rui1, WANG Gui-shi2, GAO Xiao-ming2 . Measurements of CO2 Concentration at High Temperature and Pressure Environments Using Tunable Diode Laser Absorption Spectroscopy . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(07): 1769-1773.
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