Numerical Study of Laminar Flame Velocity of Hydrogen-Enriched Methane Flames Using Several Detailed Reaction Mechanisms

Ennetta, Ridha; Alaya, Meryem; Saïd, Rachid

doi:10.1007/s13369-016-2275-3

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…The NOx formation was estimated using an extended Zeldovich mechanism since the combustion temperature of hydrogen-enriched biogas is normally greater than 1500 K [30][31][32][33][34]. The NO was generated from three chemical reactions as follows:…”

Section: Numerical Analysismentioning

confidence: 99%

Effects of Compression Ratios on Combustion and Emission Characteristics of SI Engine Fueled with Hydrogen-Enriched Biogas Mixture

Nguyen

Đức

2022

Energies

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The effects of hydrogen-enriched biogas on combustion and emissions of a dual-fuel spark-ignition engine with different hydrogen concentration ratios were studied numerically. A 1-cylinder spark ignition was used to perform a numerical simulation. To reveal the influence of the compression ratios on combustion and emissions of a gaseous engine, the crankshaft of the engine was modified to generate different compression ratios of 8.5, 9.0, 9.4, 10.0, and 10.4. The biogas contained 60 and 40% methane (CH4) and carbon dioxide (CO2), respectively, while the hydrogen fractions used to enrich biogas were 10, 20, and 30% of the mixture by volume. The ignition timing is fixed at 350 CA°. The results indicate that the in-cylinder pressure, combustion temperature, and combustion burning speed increase gradually with increasing hydrogen concentration due to the combustion characteristics of hydrogen in blends. As increasing the compression ratio, NOx emissions increase proportionally, while CO2 emissions decrease gradually. Almost no combustion process occurs as operating the compression ratio below 8.5 when using pure biogas. However, adding 20% of hydrogen fraction could improve the combustion process significantly even at a low compression ratio.

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Section: Numerical Analysismentioning

confidence: 99%

Effects of Compression Ratios on Combustion and Emission Characteristics of SI Engine Fueled with Hydrogen-Enriched Biogas Mixture

Nguyen

Đức

2022

Energies

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“…Li et al , investigated the impact of hydrogen doping ratios and initial pressure on flame instability and found that blending hydrogen led to enhanced diffusion thermal instability and hydrodynamic instability, which caused flame instability. Ennetta et al simulated the laminar burning velocity of hydrogen-doped natural gas with varying hydrogen doping ratios and found that hydrogen blending increased the laminar burning velocity. If the flow velocity of the premixed gas is equal to the flame propagation speed, then the flame will remain in a stable state.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Combustion Characteristics and Environmental Effects of Hydrogen-doped Natural Gas for Domestic Water Heaters

Chen,

Long,

Niu

et al. 2023

ACS Omega

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The addition of hydrogen to natural gas is an effective approach to broaden the range of applications for hydrogen and address the issue of global warming. However, the inclusion of hydrogen alters the combustion properties of natural gas. The paper established a simplified mechanism consisting of 19 components and a 67-step reaction for hydrogen-doped natural gas combustion. With this simplified mechanism, the effects of hydrogen doping and the utilization of porous media combustion techniques on the combustion characteristics of natural gas were investigated numerically. The results suggested that the utilization of porous media combustion technology is beneficial for achieving the complete combustion of hydrogen-doped natural gas and reducing pollutant emissions. Additionally, the total gas cost and environmental impact of domestic gas water heaters with hydrogen-doping natural gas were estimated. The findings show that the use of 20% hydrogen-doped natural gas contributes to a decrement in fuel costs and reduced emissions of CO by 25.4%, NO X by 53.9%, and CO 2 by 6.78%.

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Investigation of hydrogen blending effects on turbulent methane flame properties using PDF-Monte Carlo method and FGM chemistry tabulation approach

Alaya

Ennetta

Saïd

2019

Fuel

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Numerical Study of Laminar Flame Velocity of Hydrogen-Enriched Methane Flames Using Several Detailed Reaction Mechanisms

Cited by 5 publications

References 29 publications

Effects of Compression Ratios on Combustion and Emission Characteristics of SI Engine Fueled with Hydrogen-Enriched Biogas Mixture

Effects of Compression Ratios on Combustion and Emission Characteristics of SI Engine Fueled with Hydrogen-Enriched Biogas Mixture

Investigation on the Combustion Characteristics and Environmental Effects of Hydrogen-doped Natural Gas for Domestic Water Heaters

Investigation of hydrogen blending effects on turbulent methane flame properties using PDF-Monte Carlo method and FGM chemistry tabulation approach

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