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Effects of carbon dioxide on the upper flammability limits of methane in O2/CO2 atmosphere

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  • Hu, Xianzhong
  • Yu, Qingbo
  • Sun, Yasong

Abstract

In this paper, the effects of carbon dioxide on the upper flammability limits of oxy-methane were investigated. Firstly, the upper flammability limits of oxy-methane were measured under normal pressure and temperature. Then, the chemical effect of CO2 on the upper flammability was studied using the kinetic simulation. Finally, the thermal and radiative effects of CO2 on the upper flammability limits were discussed using energy balance analysis. The experimental upper flammability limits of CH4/O2/CO2 are from 9.5% to 33.25% in the condition of increasing oxygen concentrations from 15% to 50%. The analysis shows that the upper flammability limits of methane are mainly determined by the thermal property of CO2 and not significantly changed by the chemical and radiative effects.

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  • Hu, Xianzhong & Yu, Qingbo & Sun, Yasong, 2020. "Effects of carbon dioxide on the upper flammability limits of methane in O2/CO2 atmosphere," Energy, Elsevier, vol. 208(C).
    • Handle: RePEc:eee:energy:v:208:y:2020:i:c:s0360544220315243
    DOI: 10.1016/j.energy.2020.118417
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    References listed on IDEAS

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    2. Yin, Chungen & Yan, Jinyue, 2016. "Oxy-fuel combustion of pulverized fuels: Combustion fundamentals and modeling," Applied Energy, Elsevier, vol. 162(C), pages 742-762.
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    4. Tian, Hua & Liu, Yuewei & Shu, Gequn & Li, Linqing & Huo, Xu, 2019. "Theoretical and experimental research on the influence of initial temperature on the flammability of hydrocarbon-CO2 mixture using in organic Rankine cycle," Energy, Elsevier, vol. 167(C), pages 939-949.
    5. Hu, Xianzhong & Yu, Qingbo & Liu, Junxiang & Sun, Nan, 2014. "Investigation of laminar flame speeds of CH4/O2/CO2 mixtures at ordinary pressure and kinetic simulation," Energy, Elsevier, vol. 70(C), pages 626-634.
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    Cited by:

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    2. Wang, Xueyan & Tian, Hua & Shu, Gequn & Yang, Zhao, 2024. "Experimental and chemical kinetics study on the flammability limit of CO2/C3H6 mixture working fluid at variable initial temperature," Energy, Elsevier, vol. 301(C).

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