Measurement of Carbon Dioxide Concentration Based on Multi-pass Absorption Technology
MA Ruo-meng1,2,3, LIN Hong2,3, ZHANG Liang2,3, FENG Xiao-juan2, FANG Li-de1, ZHANG Jin-tao2,3
1.School of Quality and Technology Supervision, Hebei University, Hebei, Baoding 071002, China
2.National Institute of Metrology, Beijing 100029, China
3.Zhengzhou Institute of Metrology, Zhengzhou, Henan 450001, China
Abstract：Excessive emission of carbon dioxide is the main cause of greenhouse effect, which has a profound impact on the global environment and ecosystem. The carbon dioxide emitted from fuel combustion is the main source of urban area. In order to achieve the emission reduction through carbon emission trading, it is necessary to accurately measure the carbon dioxide in the enterprise chimney. The carbon dioxide content emitted by the enterprise chimney is generally below 20%, so it is necessary to establish a high-accuracy field measurement method. The multiple reflection absorption spectroscopy technology is used to accurately obtain (30012)←(00001) R18e transition line information of carbon dioxide at 6361.25cm-1, furtherly combines the ideal gas equation to accurately obtain the concentration of 15%, 10%, 5% and 1% carbon dioxide/nitrogen (nitrogen as balance gas) mixtures. The results show that the established device and technique can be used to measure the CO2 concentration efficiently and accurately. The measurement results are equivalent to that based on gravimetric method, and the relative expanded uncertainty is less than 0.65%(k=2).
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2020, Vol. 41 
