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

Lee, Hookyung; Lee, Min-Jung

doi:10.3390/en14185604

Cited by 38 publications

(11 citation statements)

References 96 publications

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“…After calculation, the LHV of the coal molecule is 50,454.8 kJ/mol. The LHV of NH 3 is 316.2 kJ/mol . The combustion reaction of coal is C 102 H 78 O 10 N 2 + 117.5 O 2 (g) → 102 CO 2 (g) + 2 NO (g) + 39 H 2 O (g) and the combustion reaction of NH 3 is NH 3 (g) + 0.75 O 2 (g) → 0.5 N 2 (g) + 1.5 H 2 O (g).…”

Section: Methodsmentioning

confidence: 99%

Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations

et al. 2023

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In this work, reactive force field molecular dynamics (ReaxFF MD) simulations are performed to study competitive and synergistic effects and their impact on CO, CO2, unburned carbon (UC), and nitrogen oxide (NO) emissions in coal/NH3 cofiring at different conditions. Simulation results show that cofiring results in higher emissions of UC and NO. Increasing the temperature is helpful in reducing UC emissions but has little effect on NO emissions. Although decreasing the O2 equivalent ratio can help in reducing NO emissions, UC emissions increase significantly. The conclusion is that the best O2 equivalent ratio in cofiring is 0.6. Increasing the NH3 cofiring ratio will reduce NO emissions but seriously increase UC emissions. The competition between coal and NH3 for O2 will decrease the coal combustion rate and increase the NH3 combustion rate. The competition effect is further proved by tracing the OH distribution. The synergistic mechanism is revealed. The free radicals and intermediates generated from coal combustion, such as HO2, H2O2, H, and OH, will promote NH3 decomposition and oxidation. The kinetics analysis shows that the competition between NH3 combustion and coal combustion only influences the combustion rate of coal and NH3, while the synergistic effect of coal decreases the activation energy of NH3 combustion. The research results are helpful to further study the mechanism of coal/NH3 cofiring and guide the technology of NH3 blending in coal-fired power plants.

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Section: Methodsmentioning

confidence: 99%

Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations

et al. 2023

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“…For example, there exists detailed accounts of gas turbines applications. 1,4,[87][88][89][90][91]100 Progress in piston engines is narrated in multiple review articles too. 1,4,87,91−100 There are also review articles listing studies on boilers and furnaces employing NH 3 .…”

Section: Nh 3 In Practical Devicesmentioning

confidence: 99%

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

Guiberti,

Pezzella,

Hayakawa

et al. 2023

Energy Fuels

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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.

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“…One more promising field of industrial use of ammonia and “ammonia” fuel cells is accumulation, storage, and subsequent reverse conversion of excess electric power produced by renewable power sources. The hydrogen required for ammonia synthesis is obtained from electrolysis, and nitrogen is recovered from air [ 44 ]. According to forecasts, the use of ammonia as a hydrogen-containing carbon-free fuel will start after 2030.…”

Section: Use Of Hydrogen In Chemical Industrymentioning

confidence: 99%

“…Studies performed in various countries since the 1960s demonstrated in principle the possibility of using ammonia as a motor fuel without essential upgrade of internal combustion engines both when ammonia is added to standard motor fuel and when it is used as a mixture with methane, hydrogen, and organic solvents [36,[39][40][41]. In addition, ammonia, both in the pure form and in a mixture with methane and hydrogen, is considered as a fuel for gas turbines [42][43][44][45]. Recently there has been active progress in studies concerning the possibility of using the existing and developing new fuel cells allowing conversion of ammonia to electric power [42].…”

Section: Use Of Hydrogen In Chemical Industrymentioning

confidence: 99%

Prospects for Using Hydrogen in Various Branches of the World Economy as One of the Directions of Its Decarbonization

Yakubson

2022

Russ J Appl Chem

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The review deals with the state of the art and prospects for using hydrogen in various branches of the world economy: in industry (oil-refining, chemical, steel-casting, cement), on transport (road, railway, maritime, aviation), and in production and distribution of the electric and thermal power. Using hydrogen is one of efficient directions of the economy decarbonization. The possibility and efficiency of using hydrogen, ammonia, methanol, and synthetic kerosene as a fuel for internal combustion engines and gas turbines in various kinds of vehicles and in production of the electric and thermal power are evaluated. The need for long-term hydrogen storage for reducing the influence exerted on the operation of electric networks by seasonal variations in the electric power production from renewable sources is demonstrated, and the hydrogen storage methods are considered. The feasibility of various procedures for utilizing CO 2 formed in the course of hydrogen production by steam methane conversion at industrial enterprises using hydrogen for their own needs are analyzed.

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

Cited by 38 publications

References 96 publications

Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations

Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations

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

Prospects for Using Hydrogen in Various Branches of the World Economy as One of the Directions of Its Decarbonization

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

Cited by 38 publications

References 96 publications

Insight into the Competitive and Synergistic Effects during Coal/NH3 Cofiring via Reactive Molecular Dynamics Simulations

Insight into the Competitive and Synergistic Effects during Coal/NH3 Cofiring via Reactive Molecular Dynamics Simulations

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

Prospects for Using Hydrogen in Various Branches of the World Economy as One of the Directions of Its Decarbonization

Contact Info

Product

Resources

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Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations

Insight into the Competitive and Synergistic Effects during Coal/NH₃ Cofiring via Reactive Molecular Dynamics Simulations