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Numerical study of the behavior of methane-hydrogen/air pre-mixed flame in a micro reactor equipped with catalytic segmented bluff body

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  • Baigmohammadi, Mohammadreza
  • Tabejamaat, Sadegh
  • Zarvandi, Jalal

Abstract

In this work, combustion characteristics of premixed methane-hydrogen/air in a micro reactor equipped with a catalytic bluff body is investigated numerically. In this regard, the detailed chemistry schemes for gas phase (homogeneous) and the catalyst surface (heterogeneous) are used. The applied catalytic bluff body is coated with a thin layer of platinum (Pt) on its surface. Also, the lean reactive mixture is entered to the reactor with equivalence ratio 0.9. The results of this study showed that the use of catalytic bluff body in the center of a micro reactor can significantly increase the flame stability, especially at high velocities. Moreover, it is found that a catalytic bluff body with several cavities on its surface and also high thermal conductivity improves the flame stability more than a catalytic bluff body without cavities and low thermal conductivity. Finally, it is maintained that the most advantage of using the catalytic bluff body is its easy manufacturing process as compared to the catalytic wall. This matter seems to be more prevalent when we want to create several cavities with various sizes on the bluff-body.

Suggested Citation

  • Baigmohammadi, Mohammadreza & Tabejamaat, Sadegh & Zarvandi, Jalal, 2015. "Numerical study of the behavior of methane-hydrogen/air pre-mixed flame in a micro reactor equipped with catalytic segmented bluff body," Energy, Elsevier, vol. 85(C), pages 117-144.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:117-144
    DOI: 10.1016/j.energy.2015.03.080
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    References listed on IDEAS

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    5. Maria Grazia De Giorgi & Antonio Ficarella & Donato Fontanarosa & Elisa Pescini & Antonio Suma, 2020. "Investigation of the Effects of Plasma Discharges on Methane Decomposition for Combustion Enhancement of a Lean Flame," Energies, MDPI, vol. 13(6), pages 1-19, March.
    6. Wang, Du & Ji, Changwei & Wang, Shuofeng & Yang, Jinxin & Tang, Chuanqi, 2019. "Experimental investigation on near wall ignited lean methane/hydrogen/air flame," Energy, Elsevier, vol. 168(C), pages 1094-1103.
    7. Yan, Yunfei & Wu, Gange & Huang, Weipeng & Zhang, Li & Li, Lixian & Yang, Zhongqing, 2019. "Numerical comparison study of methane catalytic combustion characteristic between newly proposed opposed counter-flow micro-combustor and the conventional ones," Energy, Elsevier, vol. 170(C), pages 403-410.
    8. Yuan, Ye & Li, GuoXiu & Sun, ZuoYu & Li, HongMeng & Zhou, ZiHang, 2016. "Experimental study on the dynamical features of a partially premixed methane jet flame in coflow," Energy, Elsevier, vol. 111(C), pages 593-598.
    9. Alipoor, Alireza & Mazaheri, Kiumars, 2016. "Combustion characteristics and flame bifurcation in repetitive extinction-ignition dynamics for premixed hydrogen-air combustion in a heated micro channel," Energy, Elsevier, vol. 109(C), pages 650-663.
    10. Ameur, Houari, 2015. "Energy efficiency of different impellers in stirred tank reactors," Energy, Elsevier, vol. 93(P2), pages 1980-1988.
    11. Zuo, Wei & E, Jiaqiang & Peng, Qingguo & Zhao, Xiaohuan & Zhang, Zhiqing, 2017. "Numerical investigations on a comparison between counterflow and coflow double-channel micro combustors for micro-thermophotovoltaic system," Energy, Elsevier, vol. 122(C), pages 408-419.
    12. De Giorgi, Maria Grazia & Ficarella, Antonio & Sciolti, Aldebara & Pescini, Elisa & Campilongo, Stefano & Di Lecce, Giorgio, 2017. "Improvement of lean flame stability of inverse methane/air diffusion flame by using coaxial dielectric plasma discharge actuators," Energy, Elsevier, vol. 126(C), pages 689-706.
    13. Zuo, Wei & E, Jiaqiang & Hu, Wenyu & Jin, Yu & Han, Dandan, 2017. "Numerical investigations on combustion characteristics of H2/air premixed combustion in a micro elliptical tube combustor," Energy, Elsevier, vol. 126(C), pages 1-12.
    14. Dai, Huaming & Song, Ziwei & Wang, Hongting & Cui, Qingyuan, 2023. "Efficient production of hydrogen by catalytic decomposition of methane with Fe-substituted hexaaluminate coated packed bed," Energy, Elsevier, vol. 273(C).
    15. Maria Grazia De Giorgi & Aldebara Sciolti & Stefano Campilongo & Antonio Ficarella, 2017. "Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges," Energies, MDPI, vol. 10(3), pages 1-15, March.
    16. Wan, Jianlong & Fan, Aiwu & Yao, Hong & Liu, Wei, 2015. "Effect of pressure on the blow-off limits of premixed CH4/air flames in a mesoscale cavity-combustor," Energy, Elsevier, vol. 91(C), pages 102-109.
    17. Fan, Aiwu & Zhang, He & Wan, Jianlong, 2017. "Numerical investigation on flame blow-off limit of a novel microscale Swiss-roll combustor with a bluff-body," Energy, Elsevier, vol. 123(C), pages 252-259.
    18. Ruirui Wang & Jingyu Ran & Xuesen Du & Juntian Niu & Wenjie Qi, 2016. "The Influence of Slight Protuberances in a Micro-Tube Reactor on Methane/Moist Air Catalytic Combustion," Energies, MDPI, vol. 9(6), pages 1-17, May.

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