Size evolution during laser-ignited single iron particle combustion

Ning, Daoguan; Shoshin, Yuriy; Oijen, J.A. van; Finotello, Giulia; Goey, de Lph Philip

doi:10.1016/j.proci.2022.07.030

Cited by 30 publications

(7 citation statements)

References 24 publications

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“…The authors explained that micro-explosion was mainly driven by the vaporization of the unreacted aluminum core at high temperatures. Recently, micro-explosions of iron particles were visualized in different reactors [32,107,108,153,154]. Huang et al [32] utilized pyrometry and high-speed imaging to determine the particle temperature before and after microexplosion, as well as the velocity, respectively.…”

Section: Other Combustion Phenomenamentioning

confidence: 99%

“…More recently, Ning et al [108] applied the light attenuation (LA) method to determine the size of iron particles sieved in the range of 45-55 µm. They employed a DBI system that consisted of an LED illumination at 395 nm and a high-speed camera for particle sizing.…”

Section: Particle Size and Shapementioning

confidence: 99%

“…The dot diameters can be evaluated using the same detection system and algorithm and compared to the defined values. Figure 12 shows an example of such an assessment with a group of circular dots measured using laser attenuation [108] and the adaptive edge detection [108] and adaptive edge detection approaches [83]. The red numbers on the x-axis denotes the ground truths of the target diameters.…”

Section: Particle Size and Shapementioning

confidence: 99%

“…For example, melting was recognized by the luminosity plateau, which revealed an average temperature that stayed relatively constant at different oxygen mole fractions and quite close to the iron melting point (figure 10 in [35]). In their subsequent studies, time-resolved pyrometry was combined with shadow imaging to investigate particle size evolution [109] and nanoparticle formation [108].…”

Section: Particle Surface Temperaturementioning

confidence: 99%

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Particle-resolved optical diagnostics of solid fuel combustion for clean power generation: a review

Li,

Geschwindner,

Dreizler

et al. 2023

Meas. Sci. Technol.

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Chemical energy carriers are crucial for addressing challenges that arise from the time lag, large distances, and temporal fluctuations in renewable energy production, which lead to unbalanced energy production and demand. However, the thermochemical utilization of chemical energy carriers such as solid fuels must be widely decarbonized to achieve a climate-neutral circular economy, despite remaining important for reliable electricity generation and stable economics. To accomplish this, extensive fundamental research is required to understand the underlying chemical and physical processes that can potentially be realized on an industrial scale. This paper reviews optical diagnostics used for particle-level combustion studies for clean power generation applications. Specifically, we focus on particle-resolved optical experiments for oxy-fuel coal combustion, biomass combustion, and utilization of iron in a regenerative oxidation-reduction scheme. We summarize previous studies categorized by the type of fuels, used reactors, investigated parameters, and experimental methodology. To provide a shared understanding, phenomenological aspects of the multistage combustion process at the particle level are outlined using examples of bituminous coal and iron particle burning in hot gas, respectively. A selection of experimental studies is highlighted, with a particular methodological focus on the measurement of relevant quantities at the particle level. These representative examples address relevant parameters, including particle number density, particle size and shape, surface temperature, ignition and combustion time, gas flame structure, gas temperature and species, nanoparticle formation, gas velocity, and particle dynamics. Finally, open issues and unsolved problems that require further effort to improve diagnostics for solid fuel combustion studies are discussed.

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Section: Other Combustion Phenomenamentioning

confidence: 99%

Section: Particle Size and Shapementioning

confidence: 99%

Section: Particle Size and Shapementioning

confidence: 99%

Section: Particle Surface Temperaturementioning

confidence: 99%

See 2 more Smart Citations

Particle-resolved optical diagnostics of solid fuel combustion for clean power generation: a review

Li,

Geschwindner,

Dreizler

et al. 2023

Meas. Sci. Technol.

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“…To design and improve real-world iron-fuel burners, an in-depth understanding of the fundamentals underlying the combustion of single iron particles is required. In the past few years, the number of more detailed experimental − and theoretical studies − regarding the combustion of single iron particles has increased drastically. In this early research on iron particle combustion, a good agreement between experiments and theoretical models for low gas temperature (300 K) and low oxygen concentration cases (up to X O2 = 0.21) was obtained.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe–O ReaxFF on Liquid Iron Oxide Properties Derived from Reactive Molecular Dynamics

Thijs,

Kritikos,

Giusti

et al. 2023

J. Phys. Chem. A

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As iron powder nowadays attracts research attention as a carbon-free, circular energy carrier, molecular dynamics (MD) simulations can be used to better understand the mechanisms of liquid iron oxidation at elevated temperatures. However, prudence must be practiced in the selection of a reactive force field. This work investigates the influence of currently available reactive force fields (ReaxFFs) on a number of properties of the liquid iron–oxygen (Fe–O) system derived (or resulting) from MD simulations. Liquid Fe–O systems are considered over a range of oxidation degrees Z O , which represents the molar ratio of O/(O + Fe), with 0 < Z O < 0.6 and at a constant temperature of 2000 K, which is representative of the combustion temperature of micrometric iron particles burning in air. The investigated properties include the minimum energy path, system structure, (im)miscibility, transport properties, and the mass and thermal accommodation coefficients. The properties are compared to experimental values and thermodynamic calculation results if available. Results show that there are significant differences in the properties obtained with MD using the various ReaxFF parameter sets. Based on the available experimental data and equilibrium calculation results, an improved ReaxFF is required to better capture the properties of a liquid Fe–O system.

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Flame propagation modes for iron particle clusters in air, Part II: Transition from continuous to discrete propagation mode under strong convection effects

Vance,

Scholtissek,

Nicolai

et al. 2024

Combustion and Flame

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Size evolution during laser-ignited single iron particle combustion

Cited by 30 publications

References 24 publications

Particle-resolved optical diagnostics of solid fuel combustion for clean power generation: a review

Particle-resolved optical diagnostics of solid fuel combustion for clean power generation: a review

Effect of Fe–O ReaxFF on Liquid Iron Oxide Properties Derived from Reactive Molecular Dynamics

Flame propagation modes for iron particle clusters in air, Part II: Transition from continuous to discrete propagation mode under strong convection effects

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