Evolution of ammonia reaction mechanisms and modeling parameters: A review

Mashruk, S; Shi, Hang; Alnajideen, Mohammad; Wang, Peipei; Pugh, D.; Valera‐Medina, Agustin

doi:10.1016/j.jaecs.2023.100175

Cited by 5 publications

(3 citation statements)

References 130 publications

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“…Most of the studies up until the 2010s were primarily focused on developing models to understand the role of NH 3 and its intermediates in DeNO x chemistry. Several key studies include those by Lindstedt et al 9,10 They constructed a detailed model for NH 3 workers investigated nitrogen combustion chemistry, including NH 3 and the interaction chemistry between C-and Ncontaining species in a number of studies. 11−16 It is anticipated that NH 3 will be blended with H 2 (or also hydrocarbons) to improve combustion performance in some practical applications.…”

Section: Nh 3 Combustion Chemistrymentioning

confidence: 99%

“…A number of excellent and extensive research articles on NH 3 as a fuel have been written in recent years, and readers are directed to those to learn more. These include landmark publications by Valera-Medina et al, − Kobayashi et al, and Mathieu and Petersen which describe various challenges associated with production, transport, and utilization of NH 3 as a fuel.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Nh 3 Combustion Chemistrymentioning

confidence: 99%

Section: Introductionmentioning

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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“…Figure 1 shows temperature and NO concentration trend as a function of the strain rate for different chemical mechanisms. The trends are the same for all mechanisms; the Gotama one shows a slight deviation at high strains; it was adopted in the present DNS since it is specifically improved for laminar burning velocities under a fuel-rich flame, i.e., up to an equivalence ratio of 1.8, and pressure in the range 0.1-0.5 MPa [40]. Despite the decreasing temperature with increasing strain rate up to the quenching, NO concentration increases.…”

Section: Laminar Diffusion Flamesmentioning

confidence: 99%

Direct Numerical Simulation of a Reacting Turbulent Hydrogen/Ammonia/Nitrogen Jet in an Air Crossflow at 5 Bar

Giacomazzi,

Cecere,

Cimini

et al. 2023

Energies

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The article aims to analyze the fluid dynamics and combustion characteristics of a non-premixed flame burning a fuel mixture derived from ammonia partial decomposition injected in an air crossflow. Nominal pressure (5 bar) and inlet air temperature (750 K) conditions are typical of micro-gas turbines. The effects of strain on the maximum flame temperature and NO generation in laminar non-premixed counter-flow flames are initially explored. Then, the whole three-dimensional fluid dynamic problem is investigated by setting up a numerical experiment: it consists of a Direct Numerical Simulation, based on accurate transport, chemical, and numerical models. The flow topology of the specific reacting jet in crossflow configuration is described in terms of its main turbulent structures, like shear layers, ring, and horse-shoe vortices, as well as of its leeward recirculation region anchoring the flame. The reacting region is characterized by providing instantaneous spatial distributions of temperature, heat release, and some transported chemical species, including NO, and calculating the Flame Index to identify non-premixed and premixed combustion local conditions. The latter is quantified by looking at the distribution of the volume fraction associated with a certain Flame Index versus the Flame Index and at the distribution of the average values of both the Heat Release Rate and NO versus the Flame Index and the mixture fraction.

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Ammonia combustion and emissions in practical applications: a review

Alnajideen,

Shi,

Northrop

et al. 2024

Carb Neutrality

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Ammonia is emerging as a viable alternative to fossil fuels in combustion systems, aiding in the reduction of carbon emissions. However, its use faces challenges, including NOx emissions and low flame speed. Innovative approaches and technologies have significantly advanced the development and implementation of ammonia as a zero-carbon fuel. This review explores current advancements in using ammonia as a fuel substitute, highlighting the complexities that various systems need to overcome before reaching full commercial maturity in support of practical decarbonising global strategies. Different from other reviews, this article incorporates insights of various industrial partners currently working towards green ammonia technologies. The work further addresses fundamental complexities of ammonia combustion, crucial for its practical and industrial implementation in various types of equipment.

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Evolution of ammonia reaction mechanisms and modeling parameters: A review

Cited by 5 publications

References 130 publications

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

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

Direct Numerical Simulation of a Reacting Turbulent Hydrogen/Ammonia/Nitrogen Jet in an Air Crossflow at 5 Bar

Ammonia combustion and emissions in practical applications: a review

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