The behavior of methane/hydrogen/air premixed flame in a closed channel with inhibition

Zhang, Chao; Shen, Xiaobo; Wen, Jennifer X.; Xiu, Guangli

doi:10.1016/j.fuel.2019.116810

Cited by 48 publications

(4 citation statements)

References 53 publications

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“…For example, the local flame extinction, combustion stability and power output of CH 4 combustion were found to be improved with H 2 enrichment [16,17]. Moreover, it has been demonstrated that the thermal and chemical effects of H 2 addition increased significantly the flame dynamics and combustion efficiency of premixed CH 4 flames [18,19].…”

Section: Introductionmentioning

confidence: 98%

Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane

Tran

Gasnot

et al. 2021

Fuel

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We report here the experimental investigation of lightly sooting methane premixed flames with and without hydrogen. Two different approaches were considered to introduce hydrogen in the methane flame, either by keeping the total gas flow rate constant or not. Speciation data were obtained using a set of analytical tools including Gas Chromatography, Fourier-Transform Infrared Spectroscopy, Jet-Cooled Laser-Induced Fluorescence, Laser-induced Incandescence coupled with Cavity Ring-Down Spectroscopy.The results include mole fraction profiles of gaseous species (C 0 -C 16 ) and soot volume fraction (f v ) measured in all studied flames. These results demonstrate that the introduction of hydrogen to the flame insignificantly impacts the maximum mole fractions of small species (

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Section: Introductionmentioning

confidence: 98%

Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane

Tran

Gasnot

et al. 2021

Fuel

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“…In the context of premixed combustion systems, the design of the combustor plays a critical role in determining flame characteristics and overall combustion performance [4][5][6]. Recently, studies have been conducted to investigate the flame behavior and shape changes due to hydrogen mixing due to the combustion rate of hydrogen seven times faster than methane [7][8][9]. The targets to be overcome in hydrogen-methane combustion are the large amount of NOx generated due to high-temperature flames [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Hydrogen-Methane Flame in Different Header Types of Premixed Combustors

Kim,

Lee,

Son

et al. 2024

Preprint

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This study investigates the impact of thin flame combustor design on hydrogen flame characteristics and combustion performance through numerical simulations. Variations in flame shape and combustibility between 100% methane and 100% hydrogen combustion are analyzed. Three combustor header shapes (flat, concave, and convex) are modeled to assess their influence on flame behavior. Results show distinct flow patterns, with concave headers promoting strong central flows and convex headers dispersing the flow outward. Temperature field analysis indicates that hydrogen flames have higher temperatures and shorter quenching distances compared to methane flames. A comparative analysis of combustion products is conducted to evaluate combustion performance and NOx emissions. Consequently, the concave header has high combustibility and increases temperatures and NOx fraction in hydrogen combustion.

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“…Due to its extremely low ignition energy, wide explosive limits, and higher laminar burning velocity, the explosion risk of hydrogen gas is much higher than other hydrocarbon fuels [10,15,16], there are many safety problems in the application of hydrogen energy, such as hydrogen embrittlement [13] and detonation. The intense pressure, high temperature, and strong shockwaves generated during methane and hydrogen gas explosions can cause severe casualties and property damage [17], while their fuel mixtures will inevitably have different ignition and combustion characteristics, posing significant safety hazards in the production, use, storage, and transportation processes of hydrogen-blended fuels [18][19][20][21]. The fuel mixture of hydrogen and methane is known as hythane, which is expected to become an alternative clean energy source.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Explosion Hazards in Methane–Air Mixtures Diluted by Hydrogen

Liu,

Yu,

et al. 2023

Energies

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The combustion efficiency of methane can be effectively enhanced with the occurrence of hydrogen. However, the combustion characteristic of premixed methane/hydrogen/air is not fully understood. In this study, the effect of the amount of hydrogen addition on the explosion risk of premixed CH4/air combustion was fully investigated through experiments and simulations. The explosion overpressure of premixed CH4/air combustion with various hydrogen additions was measured in a standard 20 L spherical closed vessel. Meanwhile, the microscopic flame structures for the same cases were simulated using 2022 Chemkin-Pro software. The results showed that hydrogen could increase the explosion risks of premixed CH4/air combustion. The rate of key elementary reactions R38: H + O2 <=> O + OH and R84: OH + H2 <=> H + H2O in the system could be accelerated by hydrogen. The peak explosion overpressure in the closed chamber is boosted and the arrival time of peak overpressure rise rate is shortened, which raises the danger. Especially under lean and rich combustion conditions, hydrogen could potentially lead to more dangerous situations. With the increase in hydrogen concentration, the reaction rate of key elementary reactions accelerates faster, the peak explosion overpressure increases more, and the peak overpressure rise rate arrives earlier.

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The behavior of methane/hydrogen/air premixed flame in a closed channel with inhibition

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Cited by 48 publications

References 53 publications

Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane

Experimental study of the influence of hydrogen as a fuel additive on the formation of soot precursors and particles in atmospheric laminar premixed flames of methane

Numerical Analysis of Hydrogen-Methane Flame in Different Header Types of Premixed Combustors

Characteristics of Explosion Hazards in Methane–Air Mixtures Diluted by Hydrogen

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