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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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Rhamdhani, M. A.
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Topics
Publications (5/5 displayed)
- 2023Kinetics and Mechanism of Hydrogen Reduction of Lead-Silicate Slagcitations
- 2013Production of aluminum sulfide through carbosulfidation utilising H 2S
- 2009Nickel laterite Part 1 – microstructure and phase characterisations during reduction roasting and leachingcitations
- 2009The kinetics of reduction of dense synthetic nickel oxide in H-2-N-2 and H-2-H2O atmospherescitations
- 2008Basic nickel carbonate: Part I. Microstructure and phase changes during oxidation and reduction processescitations
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article
The kinetics of reduction of dense synthetic nickel oxide in H-2-N-2 and H-2-H2O atmospheres
Abstract
An investigation of the kinetics of reduction of dense synthetic nickel oxide has been carried out in H-2-N-2 and H-2-H2O mixtures between 500 A degrees C and 1000 A degrees C. The progress of the reduction was followed metallographically by the measurement of the advance of the nickel product layer. The influences of hydrogen partial pressure, hydrogen-steam ratio, and temperature were systematically investigated in both sets of the mixtures. Increasing hydrogen partial pressure under all conditions investigated results in an increase in the reduction rate. In H-2-N-2 mixtures and H-2-H2O mixtures with low steam content, the initial reduction rate was found to be first order with respect to hydrogen partial pressure. In both sets of mixtures, it was found that the progress of Ni thickness was not a monotonic function of temperature. A minimum rate of advancement of Ni product was observed between 600 A degrees C and 800 A degrees C, depending on the hydrogen partial pressures and reduction time. The change in reduction behavior is shown to be directly linked to changes in Ni product microstructure.