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Modeling and simulation of isothermal reduction of a single hematite pellet in gas mixtures of H2 and CO
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
2014 (English)In: TMS 2014 143rd Annual Meeting & Exhibition, Annual Meeting Supplemental Proceedings, The Minerals, Metals, and Materials Society, 2014, 495-502 p.Conference paper (Refereed)
Abstract [en]

In the present project a time dependent computerized model that fairly accurately simulates the isothermal reduction of a hematite pellet with the use of CO and H2 gas mixtures have been developed. The model, which is based on the Shrinking Core Model (SCM), allows for the description of the chemical reactions taking place and the mass transfer conditions existing for each of the gas species present within the pellet. The equations used to describe the different steps are numerically solved with 1D axial symmetric Finite Element Modeling (FEM) using the commercial COMSOL 4.3b software. Small-scale laboratory experiments were also performed under well-controlled conditions to get an understanding for the weight loss of the pellets as a function of time. The results obtained from these experiments were incorporated into the model. The developed model clearly shows some deviations from the experimental results, but this is believed to be due to the existing variations in the shape and size of the pellets, the porosity distribution and the pelletizing history of the industrial pellets.

Place, publisher, year, edition, pages
The Minerals, Metals, and Materials Society, 2014. 495-502 p.
, TMS Annual Meeting
Keyword [en]
Comsol Multiphysics® 4.3b, Hematite, Reduction, Shrinking Core Model (SCM)
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-145480DOI: 10.1002/9781118889879.ch60ISI: 000354941300060ScopusID: 2-s2.0-84899730997ISBN: 978-111888972-5OAI: diva2:718610
143rd Annual Meeting and Exhibition, TMS 2014; San Diego, CA; United States; 16 February 2014 through 20 February 2014

QC 20140521

Available from: 2014-05-21 Created: 2014-05-21 Last updated: 2015-08-18Bibliographically approved

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Beheshti, RezaAune, Ragnhild E.
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