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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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Frost, Ray
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2020Volatilisation of trace elements during reduction of iron ore by hydrogencitations
- 2019Elemental deportment and chemical structure evolution of iron ore during direct reduction in hydrogen atmosphere
- 2016Environmental applications of inorganic-organic clays for recalcitrant organic pollutants removal: Bisphenol Acitations
- 2014Vibrational spectroscopy of the sulphate mineral sturmanite from Kuruman manganese deposits, South Africacitations
- 2014Infrared and raman spectroscopic characterization of the borate mineral vonsenite Fe2/2+ Fe3+BO5citations
- 2014A vibrational spectroscopic study of the phosphate mineral churchite (REE)(PO4).2H2Ocitations
- 2013Vibrational spectroscopic characterization of the phosphate mineral kulanite Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3citations
- 2013Vibrational spectroscopic characterization of the phosphate mineral series eosphorite-childrenite-(Mn,Fe)Al(PO4)(OH)2.(H2O)citations
- 2013The phosphate mineral arrojadite-(KFe) and its spectroscopic characterizationcitations
- 2013Vibrational spectroscopic characterization of the phosphate mineral phosphophyllite - Zn2Fe(PO4)2.4H2O, from Hagendorf Sud, Germany and in comparison with other zinc phosphatescitations
- 2012Thermal analysis and application of organoclays for water purification
- 2012Raman and infrared spectroscopic characterization of beryllonite, a sodium and beryllium phosphate mineral - implications for mineral collectorscitations
- 2011Characterisation of organoclays and adsorption of p-nitrophenol: Environmental applicationcitations
- 2011Synthesis and vibrational spectroscopy of halotrichite and bilinitecitations
- 2009Thermal decomposition of hydrotalcites with variable cationic ratioscitations
- 2008Thermal decomposition of synthesized layered double hydroxides based upon Mg/(Fe,Cr) and carbonatecitations
- 2008Thermal decomposition of hydrotalcite with molybdate and vanadate anions in the interlayercitations
- 2008Characterisation of red mud and seawater neutralised red mud using vibrational spectroscopic techniques
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document
Elemental deportment and chemical structure evolution of iron ore during direct reduction in hydrogen atmosphere
Abstract
Direct reduced iron (DRI) technologies have been developed as an alternative route for iron production alleviating the need for separate cokemaking and sintering operations. This study aimed to provide an insight into DRI production using H2 in terms of elemental content change and chemical structure evolution for improved environmental control of the process. In this work, a sample of goethite was treated from room temperature to 1000 °C in 10 vol% H2 in helium in a fixed-bed reactor. The investigated elements were divided into three groups: i) major elements (Fe and Al), ii) alkali and alkaline earth metal elements (mainly Na, K and Ca), iii) transition and post-transition metals (Ni, Cu, Zn, Pb, Cd, etc.) and iv) non-metal and metalloid elements (P, S, As, etc.) The elemental changes of iron ore with temperature were firstly determined by X-ray fluorescence (XRF) analysis and inductively coupled plasma–mass spectrometry (ICP-MS). X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) and Raman spectrometry were employed to confirm the reactions and investigate the iron ore’s chemical changes during direct reduction. XRD analysis indicated the stepwise reduction of goethite → hematite → magnetite → wustite for the goethite sample. FT-IR and Raman spectrometry revealed the transformation of chemical groups with temperature. Results showed that no obvious changes could be noticed after heating the sample to 200°C in terms of the elemental contents and chemical structure. Further treatment of the sample to 500°C and subsequently 1000°C resulted in the content changes of some elementsdue to the weight loss of hydrated water by heating and reduction of the ore sample, respectively.