Early particle formation and evolution in iron-doped flames

Lalanne, Matthieu R.; Wollny, Patrick; Nanjaiah, Monika; Menser, Jan; Schulz, Christof; Wiggers, Hartmut; Cheskis, Sergey; Wlokas, Irenäus; Rahinov, Igor

doi:10.1016/j.combustflame.2022.112251

Cited by 12 publications

(8 citation statements)

References 65 publications

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“…Molecular-level reaction mechanisms and related kinetics and thermochemistry have been studied for different reaction systems, including iron ,, and silicon. − A schematic overview of the formation process of iron oxide in a flat premixed flame is given in Figure …”

Section: Developments For Systems and Applicationsmentioning

confidence: 99%

“…The results indicated that heterogeneous processes might be involved at the particle surface inducing such higher particle temperatures that lead to their corresponding disappearance. Modeling the nanoparticle formation reactions thus needs additional information on all involved and potentially competing processes such as particle heating or cooling by collisions, particle oxidation, surface reactions on the particle, and particle evaporation …”

Section: Developments For Systems and Applicationsmentioning

confidence: 99%

“…669 The interesting disappearance of early particles in the reaction zone could not be reconciled with the assumption of Fe monomer evaporation from the iron particles if their temperature were equal to that of the surrounding gases. 698 This observation has stimulated further work in which the particle temperature was derived by a pyrometric approach from optical emission of an Fe(CO) 5 -doped H 2 /O 2 /argon flame, revealing that the particle temperature significantly exceeded the gasphase temperature. 698 The results indicated that heterogeneous processes might be involved at the particle surface inducing such higher particle temperatures that lead to their corresponding disappearance.…”

Section: Combustion Synthesismentioning

confidence: 99%

“…662,694 To improve the understanding of flame synthesis reaction systems further, specific aspects have been investigated in depth, for example by studying atomization, droplet formation, and droplet−gas phase interactions, 695 or by modeling the dynamics of SiO 2 nanoparticle synthesis using Reynolds-averaged Navier−Stokes (RANS) or large eddy simulation (LES). 696,697 Molecular-level reaction mechanisms and related kinetics and thermochemistry have been studied for different reaction systems, including iron 669,698,699 and silicon. 700−704 A schematic overview of the formation process of iron oxide in a flat premixed flame is given in Figure 42.…”

Section: Combustion Synthesismentioning

confidence: 99%

“…698 This observation has stimulated further work in which the particle temperature was derived by a pyrometric approach from optical emission of an Fe(CO) 5 -doped H 2 /O 2 /argon flame, revealing that the particle temperature significantly exceeded the gasphase temperature. 698 The results indicated that heterogeneous processes might be involved at the particle surface inducing such higher particle temperatures that lead to their corresponding disappearance. Modeling the nanoparticle formation reactions thus needs additional information on all involved and potentially competing processes such as particle heating or cooling by collisions, particle oxidation, surface reactions on the particle, and particle evaporation.…”

Section: Combustion Synthesismentioning

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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