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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Buelens, Lukas
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Publications (5/5 displayed)
- 2022Upcycling the carbon emissions from the steel industry into chemicals using three metal oxide loopscitations
- 2022Decarbonisation of steel mill gases in an energy-neutral chemical looping processcitations
- 2019Fe2O3-MgAl2O4 for CO production from CO2 : Mössbauer spectroscopy and in situ X-ray diffractioncitations
- 2016Kinetics of multi-step redox processes by time-resolved In situ X-ray diffractioncitations
- 2015Mg-Fe-Al-O for advanced CO2 to CO conversion: carbon monoxide yield vs. oxygen storage capacitycitations
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article
Fe2O3-MgAl2O4 for CO production from CO2 : Mössbauer spectroscopy and in situ X-ray diffraction
Abstract
Fe2O3/MgFeAlOx materials are promising oxygen storage candidates for chemical looping CO2 conversion. In this work, the cyclic stability of a 50Fe(2)O(3)/MgFeAlOx (containing 50 wt % Fe2O3 and 50 wt % MgAl2O4) oxygen storage material is investigated. The evolution of its bulk properties over the course of 1000 H-2/CO2 redox cycles has been studied by means of( 57)Fe Mossbauer spectroscopy and in situ X-ray diffraction. As expected, all iron in the as-prepared oxygen storage material was present as Fe3+, 64% of which in iron-rich phases alpha-Fe2O3 and alpha-FeOOH and 36% in the form of a MgFeAlOx spinel. In contrast, after 1000 redox cycles, only 19% of iron was present in an iron-rich spinel such as Fe3O4, gamma-Fe2O3, and MgFe2O4. The remaining 81% was present in the form of Mg-Fe-Al-O, including Mg-x Fe1-xO. ILEEMS measurements showed surface enrichment of Fe3+ in 50Fe(2)O(3)/MgFeAlOx after 1000 redox cycles, with 36% of all surface Fe present as Fe3+ in iron-rich spinel phases such as gamma-Fe2O3 and/or MgFe2O4.