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Oxidation progress and inner structure during single micron-sized iron particles combustion in a hot oxidizing atmosphere

Sperling, Anton; Deutschmann, Max P. 1; Ning, Daoguan ; Spielmann, Jonas; Li, Tao; Kramm, Ulrike I.; Nirschl, Hermann 1; Böhm, Benjamin; Dreizler, Andreas
1 Karlsruher Institut für Technologie (KIT)

Abstract:

The present experimental study focuses on the determination of the oxidation progress and internal structures during the combustion of single iron particles using combined in-situ optical measurements and ex-situ material examination of rapidly quenched particles. Narrowly sieved iron particles with a mean diameter of 49 µm are ignited and burn in the hot exhaust of a premixed CH$_4$/O$_2$/N$_2$ flat flame with remaining 20 vol% O$_2$, provided by a laminar flow reactor with well-defined thermal and flow boundary conditions. During particle combustion, key parameters of oxidation progress are determined optically in a time-resolved manner, such as the time-resolved particle surface temperature and the reaction time relative to the instant of the particle peak temperature. Furthermore, individually burning particles are rapidly quenched at different combustion stages and then extracted from the exhaust gas using an isokinetic extraction probe. The bulk composition of the quenched particles with respect to -Fe and its three oxides FeO, Fe$_3$O$_4$, and Fe$_2$O$_3$ is determined using Wide-angle X-ray Scattering and 57Fe Mössbauer Spectroscopy. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000175114
Veröffentlicht am 17.10.2024
Cover der Publikation
Zugehörige Institution(en) am KIT KIT-Bibliothek (BIB)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.02.2025
Sprache Englisch
Identifikator ISSN: 0016-2361, 1873-7153
KITopen-ID: 1000175114
Erschienen in Fuel
Verlag Elsevier
Band 381
Seiten Art.-Nr.: 133147
Vorab online veröffentlicht am 27.09.2024
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