A reduced mechanism for the prediction of methane-hydrogen flames in cooktop burners

Gimeno-Escobedo, Eduardo; Cubero, Ana; Ochoa, José Salvador; Fueyo, Norberto

doi:10.1016/j.ijhydene.2019.08.165

Cited by 25 publications

(14 citation statements)

References 53 publications

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“…After that, the Partially Premixed model with Steady laminar Flamelets has been set up in order to improve the numerical results. The laminar flame speed calculated by Fluent has been modified according to Gimeno-Escobedo [19]. The results are depicted in Fig.6, where it can be seen that the flow pattern is more accurate as well as the chemical products, which are smoother than the previous ones reducing their discrepancies from the experimental data.…”

Section: Steady Laminar Flamletmentioning

confidence: 96%

“…Moreover, differently from the Non-Premixed model, the latter needs a laminar flame speed profile. ANSYS Fluent R uses fitted curves for laminar flame calculation, anyway they are not always trustworthy, thus in this work, the laminar flame speed profiles for the NG and the NG-H 2 mixture have been corrected with the ones calculated using CANTERA tool and presented by Gimeno-Escobedo [19]. In this work, the Zimont model has been applied for calculating the turbulent flame speed.…”

Section: Non-premixed and Partially Premixed Flameletsmentioning

confidence: 99%

“…It is worth to highlight that the GriMech 3.0 includes all the reactions regarding the hydrogen combustion since the hydrogen-oxygen system is actually a subsystem for the oxidation of hydrocarbons [13]. Indeed, it is used as a benchmark for reduced mechanisms developed accounting for methane-hydrogen mixtures [19].…”

Section: Reduced Mechanismmentioning

confidence: 99%

“…In the field of combustion and power generation, many studies have been carried out taking into account the hydrogen combustion, which has been applied to systems such as Rankine cycle [21], Double Reheat Rankine cycle [20] and cooktop burners [19].…”

Section: Introductionmentioning

confidence: 99%

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CFD analysis of the combustion in the BERL burner fueled with a hydrogen-natural gas mixture

et al. 2020

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The regulatory restrictions, currently acting, impose a significant reduction of the Greenhouse Gas (GHG) emissions. After the coal-to-gas transition of the last decades, the fossil fuel-to-renewables switching is the current perspective. However, the variability of energy production related to Renewable Energy Sources requires the fundamental contribution of thermal power plants in order to guaranty the grid stability. Moving toward a low-carbon society, the industry is looking at a reduction of high carbon content fuels, pointing to Natural Gas (NG) and more recently to hydrogen-NG mixtures. In this scenario, a preliminary study of the BERL swirled stabilized burner is carried out in order to understand the impact of blending natural gas with hydrogen on the flame morphology and CO emissions. Preliminary 3D CFD simulations have been run with the purpose to assess the best combination of combustion model (Non Premixed and Partially Premixed Falmelets), turbulence model (Realizable k ɛ and the Reynolds Stress equation model) and chemical kinetic mechanism (GriMech3.0, GriMech 1.2 and Frassoldati). The numerical results of the BERL burner fueled with natural gas have been compared with experimental data in terms of flow patterns, radial temperature profiles, O2, CO and CO2 concentrations. Finally, a 30% hydrogen in natural gas mixture has been considered, keeping fixed the thermal power output of the burner and the global equivalence ratio.

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Section: Steady Laminar Flamletmentioning

confidence: 96%

Section: Non-premixed and Partially Premixed Flameletsmentioning

confidence: 99%

Section: Reduced Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CFD analysis of the combustion in the BERL burner fueled with a hydrogen-natural gas mixture

et al. 2020

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“…e research results showed that the GRI-Mech 3.0 mechanism has the best prediction effect on the laminar flame speed of methane-hydrogen blend. Gimeno-Escobedo et al [40] studied the reduced methane-hydrogen mixtures mechanism from the GRI-Mech 3.0 mechanism. e results showed that validation for zero-dimensional and one-dimensional calculations have a small error between the predicted and original mechanism.…”

Section: Introductionmentioning

confidence: 99%

Chemical Kinetic Study on Dual-Fuel Combustion: The Ignition Properties of n-Dodecane/Methane Mixture

Zhou

et al. 2021

International Journal of Chemical Engineering

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The natural gas (NG)/diesel dual-fuel engine has attracted extensive attention in recent years, and the influence of ignition delay on the engine is very important. Therefore, the research on the ignition delay of NG/diesel dual fuel is of great significance. In this work, a simplified n-dodecane mechanism was used to study the effect of methane mixture ratio on the n-dodecane ignition process. The results showed that the ignition delay time increased with the increase of methane content by changing the mixing ratio of methane and n-dodecane. However, the effect of methane on the ignition delay time gradually decreases when the content of the n-dodecane mixing ratio is greater than 50%. It was also found that with the increase of n-dodecane content, the reduction degree of the ignition delay time of the whole reaction system decreased and the negative temperature coefficient (NTC) behavior increased. Moreover, when the initial pressure increased from 20 bar to 60 bar, the thermal effect of methane also increases from 7.03% to 9.55%. The relationship between ignition characteristics of methane-n-dodecane and temperature was studied by changing the initial temperature. Furthermore, the evolution of species in the ignition process of the whole reaction system was analyzed, and the decomposition of n-dodecane first occurs in the reaction n-C12H26 + O2 = R + HO2 to form R and free radicals; however, the reaction CH4 + OH = CH3 + H2O dominates with the increase of the methane mixing ratio and inhibits the ignition process. Through the analysis of reaction paths, sensitivity, and rates of production and consumption of methane/n-dodecane, it was explained how n-dodecane accelerates methane ignition through the rapidly formed free radicals.

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A review of energy-efficient domestic cookstoves

Kashyap,

Pramanik,

Ravikrishna

2024

Applied Thermal Engineering

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A reduced mechanism for the prediction of methane-hydrogen flames in cooktop burners

Cited by 25 publications

References 53 publications

CFD analysis of the combustion in the BERL burner fueled with a hydrogen-natural gas mixture

CFD analysis of the combustion in the BERL burner fueled with a hydrogen-natural gas mixture

Chemical Kinetic Study on Dual-Fuel Combustion: The Ignition Properties of n-Dodecane/Methane Mixture

A review of energy-efficient domestic cookstoves

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