4.7 Article

Effect of H-2 addition on laminar burning velocity of NH3/DME blends by experimental and numerical method using a reduced mechanism

Related references

Note: Only part of the references are listed.
Article Energy & Fuels

Experimental and numerical study on laminar burning velocity and premixed combustion characteristics of NH3/C3H8/air mixtures

Zhe Wang et al.

Summary: This study provides new laminar burning velocity data for NH3/C3H8/air mixtures and investigates the premixed combustion characteristics in detail. The results show that propane promotes the combustion intensity of ammonia, but has no significant effect on the mixture heating value. NH3 substitution effectively reduces CO and CO2 emissions.
Article Energy & Fuels

Jet-stirred reactor measurements and chemical kinetic study of ammonia with dimethyl ether

Geyuan Yin et al.

Summary: An experiment was conducted to investigate the chemical kinetic effect of dimethyl ether (DME) on ammonia combustion and NO formation in a jet-stirred reactor. The mole fractions of reactants and intermediates were measured under various conditions. The key reactions were identified through pathway and sensitivity analysis. The results showed that NH2 and HO2 played important roles in ammonia oxidation, while reactions like CH3 + NO2 = CH3O + NO and HNO + O2 = NO + HO2 were essential for NO formation.
Article Thermodynamics

Applying heat flux method to laminar burning velocity measurements of NH3/CH4/air at elevated pressures and kinetic modeling study

Shixing Wang et al.

Summary: This study focuses on the combustion of NH3 blended fuels under elevated pressure conditions and proposes a new kinetic mechanism (CEU-NH3-Mech-1.1) based on experimental results. The new mechanism shows good predictability for laminar flame speed, ignition delay time, and species concentration in ammonia oxidation at high temperatures. Additionally, the study reveals the variation of pressure exponent with ammonia content and its role in validating kinetic mechanisms.

COMBUSTION AND FLAME (2022)

Article Green & Sustainable Science & Technology

Ignition delay time and laminar flame speed measurements of ammonia blended with dimethyl ether: A promising low carbon fuel blend

Gani Issayev et al.

Summary: Ammonia has been recognized as a promising future fuel for mobility and power generation due to its potential to reduce global warming. Blending ammonia with DME can enhance its reactivity, as DME is a highly reactive fuel with zero-carbon emission potential in a sustainable carbon cycle.

RENEWABLE ENERGY (2022)

Article Thermodynamics

Laminar burning velocity, Markstein length, and cellular instability of spherically propagating NH3/H2/Air premixed flames at moderate pressures

Huizhen Li et al.

Summary: This study investigates the laminar combustion characteristics of NH3/H-2/air mixtures through experiments and numerical simulations. The results indicate that the hydrogen ratio has a significant influence on the laminar burning velocity under moderate pressure, and the pressure also affects the burning velocity to some extent. The flame morphology demonstrates the presence of instability in NH3-H-2 flames under specific conditions. Furthermore, discrepancies between different reaction mechanisms and experimental results are observed.

COMBUSTION AND FLAME (2022)

Article Thermodynamics

Experimental and kinetic modeling study of the laminar burning velocity of NH3/DME/air premixed flames

Huahua Xiao et al.

Summary: This study presents an experimental and kinetic modeling investigation of the laminar burning velocity and chemical kinetics of NH3/DME/air mixtures. The results show that increasing the DME fraction enhances the burning velocity, while the initial pressure has a negative influence. The developed reaction mechanism performs well in predicting the combustion performance of different mixtures.

COMBUSTION AND FLAME (2022)

Article Energy & Fuels

Uniqueness and similarity in flame propagation of pre-dissociated NH3 + air and NH3 + H2 + air mixtures: An experimental and modelling study

Xinlu Han et al.

Summary: Ammonia is a promising hydrogen carrier and alternative fuel. Partial dissociation of ammonia can overcome the reactivity and emission problems during combustion. The laminar burning velocities of pre-dissociated ammonia + air flames were measured and compared to literature data. However, existing mechanisms cannot accurately predict the experimental results.
Article Thermodynamics

Ignition delay times of NH3/DME blends at high pressure and low DME fraction: RCM experiments and simulations

Liming Dai et al.

Summary: The autoignition delay times of ammonia/dimethyl ether (NH3/DME) mixtures are significantly affected by the percentage of DME and pressure. The oxidation of DME occurs more rapidly than that of ammonia during the ignition process, leading to the initiation of ammonia oxidation and heat release that accelerates the overall oxidation process towards ignition.

COMBUSTION AND FLAME (2021)

Article Thermodynamics

Experimental and kinetic study on the laminar burning velocities of NH3 mixing with CH3OH and C2H5OH in premixed flames

Zhihua Wang et al.

Summary: The laminar burning velocities of ammonia blended with methanol/air and ethanol/air flames were studied, a new kinetic mechanism was proposed and validated, and it was found that interactions between C- and N-containing species are insignificant for the laminar burning velocities of various ammonia blending mixtures.

COMBUSTION AND FLAME (2021)

Article Thermodynamics

Enhancement of ammonia combustion with partial fuel cracking strategy: Laminar flame propagation and kinetic modeling investigation of NH3/H2/N2/air mixtures up to 10 atm

Bowen Mei et al.

Summary: This study investigates laminar flame propagation of partially cracked NH3/air mixtures and analyzes the effects of equivalence ratio, cracking ratio, and pressure on combustion performance. Results show that in the partial fuel cracking strategy, thermal effect plays a minor role while chemical effect is significant for enhanced laminar flame propagation.

COMBUSTION AND FLAME (2021)

Review Thermodynamics

Science and technology of ammonia combustion

Hideaki Kobayashi et al.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2019)

Article Thermodynamics

Experimental and numerical study of the laminar burning velocity of CH4-NH3-air premixed flames

Ekenechukwu C. Okafor et al.

COMBUSTION AND FLAME (2018)

Article Chemistry, Physical

Chemical kinetic modeling of ammonia oxidation with improved reaction mechanism for ammonia/air and ammonia/hydrogen/air combustion

Junichiro Otomo et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2018)

Article Chemistry, Physical

Laminar burning velocity and Markstein length of ammonia/hydrogen/air premixed flames at elevated pressures

Akinori Ichikawa et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2015)

Article Chemistry, Physical

Experimental and numerical study on lean premixed methane-hydrogen-air flames at elevated pressures and temperatures

Erjiang Hu et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2009)

Article Thermodynamics

An efficient error-propagation-based reduction method for large chemical kinetic mechanisms

P. Pepiot-Desjardins et al.

COMBUSTION AND FLAME (2008)

Article Chemistry, Physical

Thermal decomposition reaction and a comprehensive kinetic model of dimethyl ether

Zhenwei Zhao et al.

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS (2008)

Article Chemistry, Physical

Ammonia for hydrogen storage: challenges and opportunities

Asbjorn Klerke et al.

JOURNAL OF MATERIALS CHEMISTRY (2008)