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Development of a porous solid model for DRI applications

Fradet, Quentin and Ali, Mohammed Liaket and Riedel, Uwe (2021) Development of a porous solid model for DRI applications. In: 9th International Conference on Modeling and Simulation of Metallurgical Processes in Steelmaking, STEELSIM 2021, pp. 8-15. STEELSIM 2021, 05-07. Okt. 2021, Wien, online. ISBN 978-3-200-07994-6.

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Abstract

The Direct Reduction (DR) of iron ore pellets with syngas or hydrogen is a promising technology to reduce the emissions of iron making. The conversion rate of single iron-ore pellets to iron has been extensively investigated. In most of these works 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. In the present study, we propose an improved porous solid model. This model solves for the mass balances of the individual gas species and the solid ones assuming spherical symmetry. The governing equations, the main algorithm, and validation cases will be presented. The open-source suite Cantera was integrated in the model. This allows the use of heterogeneous reaction mechanisms and facilitates chemical kinetics calculations. The present model also offers a wide flexibility to incorporate complex phenomena such as porosity change or carbon deposition. Another advantage of our new approach is its easy integration in multidimensional computations. In this way, the reliability of the kinetic and transport models is insured when used in multidimensional CFD-calculations.

Item URL in elib:https://elib.dlr.de/146307/
Document Type:Conference or Workshop Item (Speech)
Title:Development of a porous solid model for DRI applications
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.deUNSPECIFIED
Riedel, UweUwe.Riedel (at) dlr.deUNSPECIFIED
Date:5 October 2021
Journal or Publication Title:9th International Conference on Modeling and Simulation of Metallurgical Processes in Steelmaking, STEELSIM 2021
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 8-15
ISBN:978-3-200-07994-6
Status:Published
Keywords:Direct reduced iron, iron oxide, porous solid model, heterogeneous reaction mechanism
Event Title:STEELSIM 2021
Event Location:Wien, online
Event Type:international Conference
Event Dates:05-07. Okt. 2021
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 > Simulation and Virtual Design
Institute of Low-Carbon Industrial Processes > Low-Carbon Reducing Agents
Deposited By: Fradet, Dr. Quentin
Deposited On:16 Dec 2021 16:37
Last Modified:16 Dec 2021 16:37

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