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The unsteady investigation of methane-air premixed counterflow flame into newly proposed plus-shaped channel over palladium catalyst

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  • Edalati-nejad, Ali
  • Fanaee, Sayyed Aboozar
  • Khadem, Javad

Abstract

In this paper, the time dependent study of methane-air premixed counterflow flame into a newly proposed plus-shaped channel, in order to obtain effects of palladium catalyst surfaces on the flame structure and pollutant emissions, is described. The results are presented at non-catalytic and catalytic conditions with considering effects of reaction time and various equivalence ratios, from lean to rich combustion, on flame characteristics and pollutant emissions. The governing equations are composed of continuity, momentum, energy and mass fraction equations are numerically solved considering a coupled Piso scheme and Simple algorithm. The comparison between the presented model and published data shows an acceptable agreement that confirms the accuracy of this solution. The average values of CH4 mass fraction over the geometry at the presence of palladium catalyst is nearly decreased 25% relative to non-catalytic case. The existence of Palladium catalyst has great impact, mostly 34% decrease, on CO formation but the catalyst leads to increment of CO2 formation 5%. At different values of equivalence ratio, the average temperature of non-catalytic flame is about 16% lower than catalytic one.

Suggested Citation

  • Edalati-nejad, Ali & Fanaee, Sayyed Aboozar & Khadem, Javad, 2019. "The unsteady investigation of methane-air premixed counterflow flame into newly proposed plus-shaped channel over palladium catalyst," Energy, Elsevier, vol. 186(C).
    • Handle: RePEc:eee:energy:v:186:y:2019:i:c:s0360544219315051
    DOI: 10.1016/j.energy.2019.07.163
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    Cited by:

    1. Lopez, Luis & Giusti, Andrea & Gutheil, Eva & Olguin, Hernan, 2022. "On the effects of the fuel injection phase on heat release and soot formation in counterflow flames," Energy, Elsevier, vol. 254(PB).
    2. Qin, Mingyuan & Chew, Bee Teng & Yau, Yat Huang & Wang, Xinru & Wang, Chunqing & Luo, Xueqing & Li, Lei & Pan, Song, 2023. "Emergency heater based on gas-fired catalytic combustion infrared technology: Structure, evaluation and thermal response," Energy, Elsevier, vol. 274(C).
    3. Zare, Saeid & Lo, Hao Wei & Roy, Shrabanti & Askari, Omid, 2020. "On the low-temperature plasma discharge in methane/air diffusion flames," Energy, Elsevier, vol. 197(C).

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