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Thermogravimetric study of the oxidation of iron particles

Fradet, Quentin and kurnatowska, Michalina and Kuhn, Carola and Knapp, Anna and Deutschmann, Olaf and Soria-Verdugo, Antonio and Riedel, Uwe (2023) Thermogravimetric study of the oxidation of iron particles. 31. Deutscher Flammentag, 27-28 Sep 2023, Berlin, Germany. (Unpublished)

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Metal fuels, particularly iron, hold great promise as a sustainable source for decarbonating heat or electricity supply. However, a comprehensive understanding of the physics governing the combustion of iron dust flames is currently lacking. In this study, we present the first kinetic investigation on the oxidation of iron micrometer particles. Thermogravimetric analysis experiments were conducted under isothermal conditions and with varying uniform heating rates, with air, and with pure oxygen, as well as with various powders, featuring wide or narrow particle size distribution. Our results indicate that the oxidation of iron particles can achieve completion at relatively low temperatures, even before the appearance of wüstite. The oxidation process is modeled using Wagner's theory; significant discrepancies are observed when a uniform distribution of the particles is assumed for the oxidation of powders featuring a wide particle size distribution. The model, on the other hand, can reasonably capture the particle size dependency for sieved powders. Furthermore, an activation energy of 220 kJ/mol is derived from the Kissinger-Akahira-Sunose method and it is shown that the truncated Sestak and Berggren model can fairly reproduce isothermal and dynamic thermogravimetric analysis experiments.

Item URL in elib:https://elib.dlr.de/197893/
Document Type:Conference or Workshop Item (Lecture)
Title:Thermogravimetric study of the oxidation of iron particles
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Fradet, QuentinUNSPECIFIEDhttps://orcid.org/0000-0003-4968-8494UNSPECIFIED
Kuhn, CarolaInstitute for Chemical Technology and Polymer Chemistry, University of Karlsruhe, GermanyUNSPECIFIEDUNSPECIFIED
Knapp, AnnaInstitute for Chemical Technology and Polymer Chemistry, University of Karlsruhe, GermanyUNSPECIFIEDUNSPECIFIED
Deutschmann, OlafInstitute for Chemical Technology and Polymer Chemistry, University of Karlsruhe, GermanyUNSPECIFIEDUNSPECIFIED
Soria-Verdugo, AntonioDepartment of Thermal and Fluids Engineering, Carlos III University of Madrid (Spain)https://orcid.org/0000-0003-4255-0660UNSPECIFIED
Riedel, UweUNSPECIFIEDhttps://orcid.org/0000-0001-8682-2192UNSPECIFIED
Date:September 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Oxidation, kinetics, iron particles, thermogravimetric analysis
Event Title:31. Deutscher Flammentag
Event Location:Berlin, Germany
Event Type:national Conference
Event Dates:27-28 Sep 2023
Organizer:Technische Universität Berlin
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Low-Carbon Industrial Processes
Location: Cottbus , Zittau
Institutes and Institutions:Institute of Low-Carbon Industrial Processes > Low-Carbon Reducing Agents
Deposited By: Fradet, Dr. Quentin
Deposited On:23 Nov 2023 11:19
Last Modified:23 Nov 2023 11:19

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