Stability limits and exhaust NO performances of ammonia-methane-air swirl flames

Khateeb, Abdulrahman A.; Guiberti, Thibault F.; Zhu, Xuren; Younes, Mourad; Jamal, Aqil; Roberts, William L.

doi:10.1016/j.expthermflusci.2020.110058

Cited by 93 publications

(83 citation statements)

References 36 publications

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“…in [9][10][11][12][13][14], many other experiments, e.g. [7,[15][16][17], showed that stabilizing premixed ammonia-air flames is much more challenging than premixed methane-air flames. This issue can be mitigated by enriching ammonia with more reactive fuels such as methane or hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Stability limits and NO emissions of premixed swirl ammonia-air flames enriched with hydrogen or methane at elevated pressures

Khateeb

Guiberti

Wang

et al. 2021

International Journal of Hydrogen Energy

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130

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Section: Introductionmentioning

confidence: 99%

Stability limits and NO emissions of premixed swirl ammonia-air flames enriched with hydrogen or methane at elevated pressures

Khateeb

Guiberti

Wang

et al. 2021

International Journal of Hydrogen Energy

Self Cite

130

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“…The 50SW burner was characterized only by a lean stability range, which started from ϕ = 0.83 and has its limit at ϕ = 0.56. The presented ranges are wider than the stability limits obtained for the outflow nozzle with a constant diameter (ϕ = 0.48-0.70) investigated by Khateeb et al [34]. The equivalence ratio of 0.71 was chosen as a midpoint of both of the swirling stability limits.…”

Section: Kinetic Reaction Mechanismsmentioning

confidence: 90%

“…A good agreement with the experimental outcome was achieved, and additionally, its performance was also checked with a LES simulation of a can combustor with a swirl burner. Khateeb et al [34] experimentally investigated the effect of the swirl number and the equivalence ratio on a tangential burner flame's stability in a function of the ammonia share in the fuel. The addition of ammonia to the methane significantly widened the flammability range, but also shifted it from the lean to the rich mixtures (0.79 ≤ ϕ ≤ 1.24).…”

Section: Introductionmentioning

confidence: 99%

Emission Characteristics for Swirl Methane–Air Premixed Flames with Ammonia Addition

Jójka

Ślefarski

2021

Energies

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This paper details the experimental and numerical analysis of a combustion process for atmospheric swirl burners using methane with added ammonia as fuel. The research was carried out for lean methane–air mixtures, which were doped with ammonia up to 5% and preheated up to 473 K. A flow with internal recirculation was induced by burners with different outflow angles from swirling blades, 30° and 50°, where tested equivalence ratio was 0.71. The NO and CO distribution profiles on specified axial positions of the combustor and the overall emission levels at the combustor outlet were measured and compared to a modelled outcome. The highest values of the NO emissions were collected for 5% NH3 and 50° (1950 ppmv), while a reduction to 1585 ppmv was observed at 30°. The doubling of the firing rates from 15 kW up to 30 kW did not have any great influence on the overall emissions. The emission trend lines were not proportional to the raising share of the ammonia in the fuel. 3D numerical tests and a kinetic study with a reactor network showed that the NO outlet concentration for swirl flame depended on the recirculation ratio, residence time, wall temperature, and the mechanism used. Those parameters need to be carefully defined in order to get highly accurate NO predictions—both for 3D simulations and simplified reactor-based models.

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“…In other experimental research activities, results regarding flame characteristics for ammonia-methane co-firing [70][71][72][73][74][75], ammonia-hydrogen co-firing [76][77][78][79], and ammoniasyngas co-firing [80] have been reported, respectively. As a common opinion, it was reported that the ignition characteristics and flame velocity were improved when gas fuel with a higher reactivity than ammonia was mixed.…”

Section: Effect Of Ammonia-hydrogen and -Methane Mixture On The Combustion Characteristicsmentioning

confidence: 99%

Recent Advances in Ammonia Combustion Technology in Thermal Power Generation System for Carbon Emission Reduction

Lee

2021

Energies

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With the formation of an international carbon-neutral framework, interest in reducing greenhouse gas emissions is increasing. Ammonia is a carbon-free fuel that can be directly combusted with the role of an effective hydrogen energy carrier, and its application range is expanding. In particular, as research results applied to power generation systems such as gas turbines and coal-fired power plants have been reported, the technology to use them is gradually being advanced. In the present study, starting with a fundamental combustion research case conducted to use ammonia as a fuel, the application research case for gas turbines and coal-fired power plants was analyzed. Finally, we report the results of the ammonia-air burning flame and pulverized coal-ammonia-air co-fired research conducted at the authors’ research institute.

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Stability limits and exhaust NO performances of ammonia-methane-air swirl flames

Cited by 93 publications

References 36 publications

Stability limits and NO emissions of premixed swirl ammonia-air flames enriched with hydrogen or methane at elevated pressures

Stability limits and NO emissions of premixed swirl ammonia-air flames enriched with hydrogen or methane at elevated pressures

Emission Characteristics for Swirl Methane–Air Premixed Flames with Ammonia Addition

Recent Advances in Ammonia Combustion Technology in Thermal Power Generation System for Carbon Emission Reduction

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