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Development of a porous solid model for the direct reduction of iron ore pellets

Fradet, Quentin and Ali, Mohammed Liaket and Riedel, Uwe (2022) Development of a porous solid model for the direct reduction of iron ore pellets. steel research international, 93 (12), p. 2200042. Wiley. doi: 10.1002/srin.202200042. ISSN 1611-3683.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/srin.202200042

Abstract

The direct reduction of iron ore pellets with syngas or hydrogen is a promising technology to reduce the CO2 emissions of the iron and steel industry. The conversion rate of single iron ore pellets to iron is extensively investigated. In most of these studies, a shrinking core model is employed to reproduce the experimental observations. However, this model presents an inherent bias by assuming a sharp separation between a fully converted region and a fully unreacted one. Herein the present study, an improved porous solid model is proposed. This model solves the mass balances of the individual gas species and the solid ones assuming spherical symmetry. The governing equations, the main algorithm, and validation cases are presented. The present model also offers wide flexibility to incorporate complex phenomena such as porosity changes or carbon deposition. Furthermore, the proposed model is integrated into a computational fluid dynamics (CFD) environment. It is verified that identical input parameters yield almost identical results in both frameworks, opening the gate toward reliable CFD simulations of industrial-scale reactors.

Item URL in elib:https://elib.dlr.de/189272/
Document Type:Article
Title:Development of a porous solid model for the direct reduction of iron ore pellets
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fradet, QuentinQuentin.Fradet (at) dlr.dehttps://orcid.org/0000-0003-4968-8494
Ali, Mohammed LiaketMohammed.Ali (at) dlr.dehttps://orcid.org/0000-0002-9314-0402
Riedel, UweUwe.Riedel (at) dlr.dehttps://orcid.org/0000-0001-8682-2192
Date:2022
Journal or Publication Title:steel research international
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:93
DOI:10.1002/srin.202200042
Page Range:p. 2200042
Editors:
EditorsEmailEditor's ORCID iD
Wu, MenghuaiUniversity of Leoben, AustriaUNSPECIFIED
Publisher:Wiley
ISSN:1611-3683
Status:Published
Keywords:computational fluid dynamics, direct reduction, heterogeneous reaction mechanism, iron oxide, porous solid model
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
Institutes and Institutions:Institute of Low-Carbon Industrial Processes
Deposited By: Fradet, Dr. Quentin
Deposited On:24 Nov 2022 10:33
Last Modified:02 Dec 2022 10:57

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