Ali, Mohammed Liaket und Fradet, Quentin und Riedel, Uwe (2023) Computational Modeling of Iron-oxide Pellets Reduction using H2 in a Fixed Bed. Jahrestreffen der DECHEMA-Fachgruppen Computational Fluid Dynamics und Wärme- und Stoffübertragung, 2023-03-06 - 2023-03-08, Frankfurt am Main. (nicht veröffentlicht)
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Kurzfassung
Full-fledged computational modeling of Direct Reduction (DR) reactors encompasses single pellets models and the step-wise scaling-up to industrial-scale reactors. The specific focus lies here on scale-up from a single iron ore pellet to a fixedbed reactor model. However, this process poses several challenges like, a) Synthetic packed-bed structures need to be generated instead of a realistic image-based method due to the high cost, b) Good quality mesh for multi-pellet fixed bed is difficult to generate and c) Scaling up to a CFD environment is cost-intensive. Furthermore, the correct modeling of transport and kinetics-related processes for a single pellet is a prerequisite for a meaningful scale-up. This has not yet been demonstrated. In this work, the chemistry and transport data for the reduction of single iron oxide pellets with H2 gas, obtained from a previously developed 1D solid porous model will be used. The purposes of this article are 1) Proposing a CFD model that reproduces single pellet reduction experiments with H2 gas for wide experimental conditions in a 3D-CFD environment. 2) Computationally generating a random packing of 212 industrial pellets (0.5 kg) by applying the discrete element method (DEM) to simulate a lab-scale fixedbed reactor. 3) Creating a 3D domain, based on the particle position data from the previous step and meshing the pellets and the voids among them in different refinements. 4) Reproducing a multi-pellet fixed-bed experiment with pure H2 from literature. 5) Investigating the effects of temperature variations in the bed. In this way, the concept of scaling up to multi-pellet fixed bed model simulation with H2 will be demonstrated successfully
elib-URL des Eintrags: | https://elib.dlr.de/204606/ | ||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vorlesung, Poster) | ||||||||||||||||
Titel: | Computational Modeling of Iron-oxide Pellets Reduction using H2 in a Fixed Bed | ||||||||||||||||
Autoren: |
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Datum: | 6 März 2023 | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Nein | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||
Status: | nicht veröffentlicht | ||||||||||||||||
Stichwörter: | Fixed-bed, CFD, Iron oxide pellet, direct reduction process, packed-bed generation | ||||||||||||||||
Veranstaltungstitel: | Jahrestreffen der DECHEMA-Fachgruppen Computational Fluid Dynamics und Wärme- und Stoffübertragung | ||||||||||||||||
Veranstaltungsort: | Frankfurt am Main | ||||||||||||||||
Veranstaltungsart: | nationale Konferenz | ||||||||||||||||
Veranstaltungsbeginn: | 6 März 2023 | ||||||||||||||||
Veranstaltungsende: | 8 März 2023 | ||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||
HGF - Programm: | Materialien und Technologien für die Energiewende | ||||||||||||||||
HGF - Programmthema: | Thermische Hochtemperaturtechnologien | ||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||
DLR - Forschungsgebiet: | E SP - Energiespeicher | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Dekarbonisierte Industrieprozesse | ||||||||||||||||
Standort: | Cottbus , Zittau | ||||||||||||||||
Institute & Einrichtungen: | Institut für CO2-arme Industrieprozesse Institut für CO2-arme Industrieprozesse > Kohlenstoffarme Reduktionsmittel | ||||||||||||||||
Hinterlegt von: | Fradet, Dr. Quentin | ||||||||||||||||
Hinterlegt am: | 11 Jun 2024 12:45 | ||||||||||||||||
Letzte Änderung: | 11 Jun 2024 12:45 |
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