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Predictions of NO and CO emissions in ammonia/methane/air combustion by LES using a non-adiabatic flamelet generated manifold

Author

Listed:
  • Honzawa, Takafumi
  • Kai, Reo
  • Okada, Akiko
  • Valera-Medina, Agustin
  • Bowen, Philip J.
  • Kurose, Ryoichi

Abstract

A large-eddy simulation (LES) employing a non-adiabatic flamelet generated manifold approach, which can account for the effects of heat losses due to radiation and cold walls, is applied to NH3/CH4/air combustion fields generated by a swirl burner, and the formation mechanisms of NO and CO for ammonia combustion are investigated in detail. The amounts of NO and CO emissions for various equivalence ratios, are compared with those predicted by LES employing the conventional adiabatic flamelet generated manifold approach and measured in the bespoke experiments. The results show that the amounts of NO and CO emissions predicted by the large-eddy simulations with the non-adiabatic flamelet generated manifold approach agree well with the experiments much better than the ones with the adiabatic flamelet generated manifold approach. This is because the NO and CO reactions for NH3/CH4/air combustion are quite susceptible to H and OH radicals’ concentrations and gas temperature. This suggests that it is essential to take into account the effects of various heat losses caused by radiation and cold walls in predicting the NO and CO emissions for the combustion of ammonia as a primary fuel.

Suggested Citation

  • Honzawa, Takafumi & Kai, Reo & Okada, Akiko & Valera-Medina, Agustin & Bowen, Philip J. & Kurose, Ryoichi, 2019. "Predictions of NO and CO emissions in ammonia/methane/air combustion by LES using a non-adiabatic flamelet generated manifold," Energy, Elsevier, vol. 186(C).
    • Handle: RePEc:eee:energy:v:186:y:2019:i:c:s0360544219314422
    DOI: 10.1016/j.energy.2019.07.101
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    Citations

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    Cited by:

    1. Marco-Osvaldo Vigueras-Zuniga & Maria-Elena Tejeda-del-Cueto & José-Alejandro Vasquez-Santacruz & Agustín-Leobardo Herrera-May & Agustin Valera-Medina, 2020. "Numerical Predictions of a Swirl Combustor Using Complex Chemistry Fueled with Ammonia/Hydrogen Blends," Energies, MDPI, vol. 13(2), pages 1-17, January.
    2. Cai, Lei & He, Tianzhi & Xiang, Yanlei & Guan, Yanwen, 2020. "Study on the reaction pathways of steam methane reforming for H2 production," Energy, Elsevier, vol. 207(C).
    3. Marco Osvaldo Vigueras-Zúñiga & Maria Elena Tejeda-del-Cueto & Syed Mashruk & Marina Kovaleva & Cesar Leonardo Ordóñez-Romero & Agustin Valera-Medina, 2021. "Methane/Ammonia Radical Formation during High Temperature Reactions in Swirl Burners," Energies, MDPI, vol. 14(20), pages 1-13, October.
    4. Cai, Tao & Zhao, Dan & Chan, Siew Hwa & Shahsavari, Mohammad, 2022. "Tailoring reduced mechanisms for predicting flame propagation and ignition characteristics in ammonia and ammonia/hydrogen mixtures," Energy, Elsevier, vol. 260(C).
    5. Wu, Fang-Hsien & Chen, Guan-Bang, 2020. "Numerical study of hydrogen peroxide enhancement of ammonia premixed flames," Energy, Elsevier, vol. 209(C).
    6. Chengming Wang & Haiou Wang & Kun Luo & Jianren Fan, 2023. "The Effects of Cracking Ratio on Ammonia/Air Non-Premixed Flames under High-Pressure Conditions Using Large Eddy Simulations," Energies, MDPI, vol. 16(19), pages 1-19, October.
    7. Joanna Jójka & Rafał Ślefarski, 2021. "Emission Characteristics for Swirl Methane–Air Premixed Flames with Ammonia Addition," Energies, MDPI, vol. 14(3), pages 1-19, January.
    8. Chai, Wai Siong & Bao, Yulei & Jin, Pengfei & Tang, Guang & Zhou, Lei, 2021. "A review on ammonia, ammonia-hydrogen and ammonia-methane fuels," Renewable and Sustainable Energy Reviews, Elsevier, vol. 147(C).

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