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Experimental Study of H2 and/or N2 Addition Effects on CO/CO2-Air Flames using a Combustion Diagnostic System

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Abstract

In this work, the effects of H2 (0–8 vol%) addition, N2 (0–8 vol%) addition, and H2/N2 (4 vol%/4 vol%) addition in CO/CO2 gas flow on the flame structure, flame temperature, and CO2 concentration in flames were investigated. A combustion diagnostic system based on tunable diode laser absorption spectroscopy (TDLAS) was utilized to measure the flame temperature and CO2 concentration in flames simultaneously. This work simulated the combustion of converter gas (CO/CO2/H2/N2) in an industrial turbulent partly premixed burner. The results show that with the addition of H2(0–8 vol%) in CO/CO2 flame and the addition of H2(4 vol%) in CO/CO2/N2(4 vol%) flame, the flame length is longer than that with the same volume addition of N2. The added reactions caused by the addition of H2(4 vol%) in CO/CO2 flame and CO/CO2/N2(4 vol%) flame result in a larger high-temperature reaction zone. The enrichment of H2(8 vol%) in CO/CO2/H2(4 vol%) flame, the dilution of N2(0–8 vol%) in CO/CO2 flame, and the dilution of N2(4 vol%) in CO/CO2/H2(4 vol%) flame make little difference on the high-temperature reaction zone. The promotion effects of H2 addition on CO2 formation are more prominent than the dilution effects of N2 addition on CO2 concentration in flames.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (U1960205), and the State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Yu Liu, Qingguo Xue, Haibin Zuo, Xuefeng She & Jingsong Wang

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  1. Yu Liu
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  2. Qingguo Xue
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  3. Haibin Zuo
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  4. Xuefeng She
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  5. Jingsong Wang
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Correspondence to Jingsong Wang.

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Liu, Y., Xue, Q., Zuo, H. et al. Experimental Study of H2 and/or N2 Addition Effects on CO/CO2-Air Flames using a Combustion Diagnostic System. J. Therm. Sci. 30, 1268–1277 (2021). https://doi.org/10.1007/s11630-021-1451-2

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  • DOI: https://doi.org/10.1007/s11630-021-1451-2

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