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Study on the effect of hydrogen fraction on the premixed combustion characteristics of syngas/air mixtures

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  • Jiang, Yan-huan
  • Li, Guo-xiu
  • Li, Hong-meng
  • Zhang, Guo-peng
  • Lv, Jia-cheng

Abstract

Effect of hydrogen fraction on the combustion characteristics of syngas/air mixtures was experimentally investigated at various hydrogen fractions and equivalence ratios in a turbulent combustion bomb under atmospheric temperature and pressure. The laminar burning velocity and turbulent burning velocity at various hydrogen fractions were measured, and the promotion of turbulence on the burning velocity at various hydrogen fractions was systematically investigated. The results show that the laminar burning velocity of the H2/CO/air mixture exhibits a non-linear increasing trend with increasing hydrogen fraction. With increasing equivalence ratio, the laminar burning velocity increases remarkably. Reaction CO + OH = CO2 + H is identified as the most dominate chain branching reactions and reaction H + OH + M = H2O + M is the most dominant chain termination reaction. The laminar burning velocity exhibits linear and non-linear growth with the maximum concentration of radical H and OH, respectively. With increasing the hydrogen fraction, the value of uT/uL shows a non-linear decreasing trend as a whole and the growth rate gradually decreases. As the equivalence ratio increases, the uT/uL value decrease. When the hydrogen fraction is more than 50%, the promoting effect of turbulence on the burning velocity decreases gradually.

Suggested Citation

  • Jiang, Yan-huan & Li, Guo-xiu & Li, Hong-meng & Zhang, Guo-peng & Lv, Jia-cheng, 2020. "Study on the effect of hydrogen fraction on the premixed combustion characteristics of syngas/air mixtures," Energy, Elsevier, vol. 200(C).
    • Handle: RePEc:eee:energy:v:200:y:2020:i:c:s036054422030699x
    DOI: 10.1016/j.energy.2020.117592
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    References listed on IDEAS

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    1. Zeng, Wen & Liu, Jing & Ma, Hongan & Liu, Yu & Liu, Aiguo, 2018. "Experimental study on the flame propagation and laminar combustion characteristics of landfill gas," Energy, Elsevier, vol. 158(C), pages 437-448.
    2. Li, Hong-Meng & Li, Guo-Xiu & Sun, Zuo-Yu & Zhou, Zi-Hang & Li, Yuan & Yuan, Ye, 2016. "Investigation on dilution effect on laminar burning velocity of syngas premixed flames," Energy, Elsevier, vol. 112(C), pages 146-152.
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    Cited by:

    1. Zhang, Guo-Peng & Li, Guo-Xiu & Li, Hong-Meng & Lv, Jia-Cheng, 2022. "Effect of diluent gas on propagation and explosion characteristics of hydrogen-rich syngas laminar premixed flame," Energy, Elsevier, vol. 246(C).
    2. Long Zhang & Shanshan Zhang & Hua Zhou & Zhuyin Ren & Hongchuan Wang & Xiuxun Wang, 2022. "Efficient Combustion of Low Calorific Industrial Gases: Opportunities and Challenges," Energies, MDPI, vol. 15(23), pages 1-14, December.
    3. Baraiya, Nikhil A. & Ramanan, Vikram & Nagarajan, Baladandayuthapani & Vegad, Chetankumar S. & Chakravarthy, S.R., 2023. "Dynamic mode decomposition of syngas (H2/CO) flame during transition to high-frequency instability in turbulent combustor," Energy, Elsevier, vol. 263(PD).
    4. Zhong, Shenghui & Xu, Shijie & Bai, Xue-Song & Peng, Zhijun & Zhang, Fan, 2021. "Large eddy simulation of n-heptane/syngas pilot ignition spray combustion: Ignition process, liftoff evolution and pollutant emissions," Energy, Elsevier, vol. 233(C).

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