Experimental study and numerical validation of oxy-ammonia combustion at elevated temperatures and pressures

Karan, Alka; Dayma, Guillaume; Chauveau, Christian; Halter, Fabien

doi:10.1016/j.combustflame.2021.111819

Cited by 35 publications

(5 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In respect to calculate the NOx formation originated from NH 3 , the equations related with containing-N species (i.e., R9, R10, and R11) are resolved. 8,11,52,53 Hence, during pulverized coal/NH 3 cocombustion, NOx evaluations are conducted by a method of coupling the postprocessing approach for NOx emissions from pulverized coal combustion with the solved equations of the related NOx species from NH 3 combustion, which is also reported by Ishihara et al 12,19 3. RESULTS AND DISCUSSION 3.1.…”

Section: Nox Formation Mechanismmentioning

confidence: 99%

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

et al. 2022

View full text Add to dashboard Cite

Cocombustion technology of pulverized coal blending with NH 3 has a promising use in large-scale CO 2 reduced emission. However, the unstable flame and high NOx emissions during the cocombustion process retard its wide application. In order to overcome these limits, a new scheme of advanced moderate or intense low-oxygen dilution (MILD) combustion technology implemented in pulverized coal/NH 3 cocombustion is proposed in this work, and a numerical study on cocombustion characteristics of pulverized coal blending with different NH 3 proportions (0% ∼ 50% NH 3 , by caloric) is performed. Results show that the achievement of a pulverized coal/NH 3 MILD combustion regime is preferred at a high NH 3 case. As NH 3 proportions increase from 0 to 50%, the furnace temperatures are decreased due to the enhancement of heat transfer between flue gas and the furnace wall. The ignition time and temperature of coal particles are decreased by 52.1 and 33.0%, respectively, while the particle burnout time is prolonged by 52.3% and the char consumption rate decreases linearly. In addition, MILD combustion shows a good potential to reduce NOx conversion during pulverized coal/NH 3 cofiring. Although the proportion of NH 3 reaches up to 50%, NOx conversion ratio is only 2.1%. These results are expected to provide several new insights into stable flame and low NOx emissions of pulverized coal/NH 3 cocombustion.

show abstract

Section: Nox Formation Mechanismmentioning

confidence: 99%

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Lhuillier et al 69 also carried out LBV measurements under atmospheric pressure conditions up to 473 K, while Shrestha et al 58 measured LBV at up to 10 atm. However, due to the challenges associated with using the constant pressure method at high pressure conditions, Karan et al 70 employed a constant volume method. They diluted the NH 3 -O 2 mixture with Ar or He to reduce the influence of instability on the flame front.…”

Section: Fundamental Flame Characteristics Of Nhmentioning

confidence: 99%

Mini Review of Ammonia for Power and Propulsion: Advances and Perspectives

Guiberti,

Pezzella,

Hayakawa

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Ammonia is a molecule that has been essential to human activities for centuries. It is widely used as a feedstock for fertilizers, industrial chemicals, and emissions after-treatment systems. The properties of ammonia have led to its interest as a carrier for hydrogen in energy applications. The combustion of ammonia for power and propulsion offers direct applications of this molecule in energy and transportation applications. However, there are significant challenges related to ammonia combustion, including low flammability and potentially high emissions. Blending of ammonia with hydrogen or hydrocarbons offers opportunities to improve combustibility. This mini review discusses challenges related to ammonia combustion and current state-of-the-art approaches to overcoming these challenges with research into chemical kinetics, laminar and turbulent flames, and engine and turbine systems. This paper seeks to introduce and summarize recent results on ammonia combustion by highlighting pertinent aspects of this rich and rapidly increasing body of information.

show abstract

“…In both cases, the competition between the reaction H + O2 ⇌ O + OH and H + O2 (+M) ⇌ HO2 (+M) has a strong effect, as expected. The rate constants for these two reactions have been adopted as the ones proposed by Stagni et al [26] which seem to properly describe this competition [27]. Another reaction showing an important effect for both conditions is the reaction CO + OH ⇌ CO2 +H, for which the rate parameters are adopted from Davis [28].…”

Section: Sensitivity Analysismentioning

confidence: 99%

An experimental and kinetic modeling study of auto-ignition and flame propagation of ethyl lactate/air mixtures, a potential octane booster

Cenedese

Serinyel

Halter

et al. 2023

Proceedings of the Combustion Institute

Self Cite

View full text Add to dashboard Cite

Experimental study and numerical validation of oxy-ammonia combustion at elevated temperatures and pressures

Cited by 35 publications

References 34 publications

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

Mini Review of Ammonia for Power and Propulsion: Advances and Perspectives

An experimental and kinetic modeling study of auto-ignition and flame propagation of ethyl lactate/air mixtures, a potential octane booster

Contact Info

Product

Resources

About

Experimental study and numerical validation of oxy-ammonia combustion at elevated temperatures and pressures

Cited by 35 publications

References 34 publications

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH3 under Moderate or Intense Low-Oxygen Dilution Combustion Mode

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH3 under Moderate or Intense Low-Oxygen Dilution Combustion Mode

Mini Review of Ammonia for Power and Propulsion: Advances and Perspectives

An experimental and kinetic modeling study of auto-ignition and flame propagation of ethyl lactate/air mixtures, a potential octane booster

Contact Info

Product

Resources

About

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode

Computational Study on Cocombustion Characteristics of Pulverized Coal Blending with NH₃ under Moderate or Intense Low-Oxygen Dilution Combustion Mode