About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
A Tailor-made Experimental Setup for Thermogravimetric Analysis of the Hydrogen- and Carbon Monoxide- based Reduction of Iron (III) Oxide (Fe2O3) and Zinc Ferrite (ZnOFe2O3) |
Author(s) |
Ulrich Brandner, Juergen Antrekowitsch, Felix Hoffelner, Manuel Leuchtenmueller |
On-Site Speaker (Planned) |
Ulrich Brandner |
Abstract Scope |
Electric arc furnace dust contains valuable metals like iron and zinc. The high temperature and the oxidizing conditions in the off-gas stream of the electric arc furnace form iron (III)oxide (Fe2O3), zinc oxide (ZnO) and zinc ferrite (ZnOFe2O3). The state-of-the-art treatment for EAFD is based on the carbothermal reduction of these oxides and thus emitting CO2 contributing to the anthropogenic climate change. An approach to reduce CO2 emissions in electric arc furnace dust recycling processes is the substitution of carbon with hydrogen. An economic evaluation of the industrial feasibility of using hydrogen requires basic research dealing with its influence on the reduction behavior of iron (III) oxide (Fe2O3) and zinc ferrite (ZnOFe2O3), when carbon is substituted with hydrogen. This work gives an insight into thermogravimetric analysis comparing carbon monoxide and hydrogen-based reduction in a tailor-made thermogravimetric analysis instrument (TGA). It allows for the investigation of sole reactions with mixtures of hydrogen and water vapor, showing that the reduction of Fe2O3 is three times and the reduction of ZnOFe2O3 two times faster when hydrogen substitutes carbon monoxide at 800 °C. |
Proceedings Inclusion? |
Planned: |
Keywords |
Recycling and Secondary Recovery, Environmental Effects, |