Flammability enhancement of swirling ammonia/air combustion using AC powered gliding arc discharges

Tang, Yong; Xie, Dingjiang; Shi, Baolu; Wang, Ningfei; Li, Shuiqing

doi:10.1016/j.fuel.2021.122674

Cited by 58 publications

(33 citation statements)

References 54 publications

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“…572 In addition to the concentrations of the main and intermediate combustion species, including excited and charged particles, the electric field and electron density distribution should be determined as a function of the fuel−oxidizer−bath gas system and of the relevant discharge parameters, on the time scales of the related processes. 570,571,574 Current research in plasma-assisted combustion is devoted to study ignition, 575−580 flame stabilization and combustion enhancement, 578,581−586 kinetics and mechanism development, 575,579−581,587−590 process visualization, 576,577,582,591,592 species diagnostics, 575,582,584−586,588−590,593−597 electric field and/or electron density measurements, 586,596,598 and numerical simulation, 575,[577][578][579][580]584,591,592,597 using different types of plasma generation, e.g., with repetitively pulsed nanosecond, [576][577][578]581,585,586,[591][592][593]595,599 dielectric barrier discharge, 577,579,588,590,594,596,597 gliding arc, …”

Section: Combustion and Plasma Activationmentioning

confidence: 99%

“…570,571,574 Current research in plasma-assisted combustion is devoted to study ignition, 575−580 flame stabilization and combustion enhancement, 578,581−586 kinetics and mechanism development, 575,579−581,587−590 process visualization, 576,577,582,591,592 species diagnostics, 575,582,584−586,588−590,593−597 electric field and/or electron density measurements, 586,596,598 and numerical simulation, 575,[577][578][579][580]584,591,592,597 using different types of plasma generation, e.g., with repetitively pulsed nanosecond, [576][577][578]581,585,586,[591][592][593]595,599 dielectric barrier discharge, 577,579,588,590,594,596,597 gliding arc, 582,583 and microwave 584 activation. Fuels include hydrogen, 577,597,…”

Section: Combustion and Plasma Activationmentioning

confidence: 99%

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Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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Combustion is a reactive oxidation process that releases energy bound in chemical compounds used as fuels�energy that is needed for power generation, transportation, heating, and industrial purposes. Because of greenhouse gas and local pollutant emissions associated with fossil fuels, combustion science and applications are challenged to abandon conventional pathways and to adapt toward the demand of future carbon neutrality. For the design of efficient, low-emission processes, understanding the details of the relevant chemical transformations is essential. Comprehensive knowledge gained from decades of fossil-fuel combustion research includes general principles for establishing and validating reaction mechanisms and process models, relying on both theory and experiments with a suite of analytic monitoring and sensing techniques. Such knowledge can be advantageously applied and extended to configure, analyze, and control new systems using different, nonfossil, potentially zero-carbon fuels. Understanding the impact of combustion and its links with chemistry needs some background. The introduction therefore combines information on exemplary cultural and technological achievements using combustion and on nature and effects of combustion emissions. Subsequently, the methodology of combustion chemistry research is described. A major part is devoted to fuels, followed by a discussion of selected combustion applications, illustrating the chemical information needed for the future.

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Section: Combustion and Plasma Activationmentioning

confidence: 99%

Section: Combustion and Plasma Activationmentioning

confidence: 99%

Combustion, Chemistry, and Carbon Neutrality

Kohse‐Höinghaus

2023

Chem. Rev.

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“…Valera-Medina et al [19] have demonstrated using OH* Chemiluminescence that the stability region of ammonia flames is quite narrow and it can be achieved using strong swirling flows. Tang et al [20] showed that arc gliding AC power is a useful technique to increase the stability region of ammonia/air flame and to extend its lean blow-off limit. Rocha et al [21] verified three scenarios for ammonia combustion, namely dry low emissions (DLE); rich burn, quick quench, and lean burn (RQL); and moderate or intense low oxygen dilution (MILD) under the turbine conditions (inlet temperature 500 K and 20 bar).…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of ammonia combustion for domestic applications

Bazooyar

Coomson²,

Manović³

et al. 2023

Journal of the Energy Institute

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“…39,40 More recently, it was used to stabilize pure ammonia flames. 41,42 Aiming at the future practical use of PAC for NH 3 /CH 4 mixtures, the GA performance on the premixed swirl flames (PSFs), which is an important feature in modern combustors, needs to be thoroughly illustrated.…”

Section: Introductionmentioning

confidence: 99%

“…As an ideal intermediate between thermal and non-thermal plasmas, the GA discharge possesses not only a relatively high plasma density but also high electron temperature and chemical selectivity . We have found that the GA discharge significantly extended the LBO limits of methane flames. , More recently, it was used to stabilize pure ammonia flames. , Aiming at the future practical use of PAC for NH 3 /CH 4 mixtures, the GA performance on the premixed swirl flames (PSFs), which is an important feature in modern combustors, needs to be thoroughly illustrated.…”

Section: Introductionmentioning

confidence: 99%

Stabilization and Emission Characteristics of Gliding Arc-Assisted NH₃/CH₄/Air Premixed Flames in a Swirl Combustor

et al. 2022

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This paper investigates the effects of gliding arc (GA) discharge on the stabilization and emission characteristics of premixed NH3/CH4/air swirl flames under various ammonia contents, flow rates, and global equivalence ratios. First, the lean blowout (LBO) limits are measured. We find that although blending CH4 extends the LBO limit of the ammonia flame to 0.6–0.8, the GA discharge further remarkably extends it to 0.3–0.4. Then, the flow and flame structures are visualized by simultaneous OH planar laser-induced fluorescence and particle imaging velocimetry measurements. The results reveal that the discharge increases the OH radical concentration and expands the inner recirculation zone, leading to improved flame stability. Second, the NO x emissions are investigated over a wide range of global equivalence ratios and ammonia contents. It is seen that the GA discharge slightly increases the NO x emission by less than 7% at low NH3 contents (<0.6), which can be attributed to the thermal and OH-involved reaction pathway of NO x formation. However, as the NH3 content further increases (which is accompanied by the rapid growth of the NO x emission), the GA discharge effectively reduces the NO x emission by up to 30%. This effect might be due to the more intensive NO x -consuming reactions by plasma-induced NH2 radicals at a higher ammonia content, which is confirmed by the strengthened NH2* chemiluminescence under GA discharge conditions. Finally, a chemical reactor network analysis gives reasonable NO x predictions without GA discharge and highlights the NO x -reduction effects of NH2 radicals under high ammonia contents.

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Flammability enhancement of swirling ammonia/air combustion using AC powered gliding arc discharges

Cited by 58 publications

References 54 publications

Combustion, Chemistry, and Carbon Neutrality

Combustion, Chemistry, and Carbon Neutrality

Comparative analysis of ammonia combustion for domestic applications

Stabilization and Emission Characteristics of Gliding Arc-Assisted NH₃/CH₄/Air Premixed Flames in a Swirl Combustor

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Flammability enhancement of swirling ammonia/air combustion using AC powered gliding arc discharges

Cited by 58 publications

References 54 publications

Combustion, Chemistry, and Carbon Neutrality

Combustion, Chemistry, and Carbon Neutrality

Comparative analysis of ammonia combustion for domestic applications

Stabilization and Emission Characteristics of Gliding Arc-Assisted NH3/CH4/Air Premixed Flames in a Swirl Combustor

Contact Info

Product

Resources

About

Stabilization and Emission Characteristics of Gliding Arc-Assisted NH₃/CH₄/Air Premixed Flames in a Swirl Combustor