| People | Locations | Statistics |
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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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Ilyushechkin, Alex
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2023Transformation of mineral matter during pyrolysis, gasification and combustion of biosolid chars
- 2023Fundamentals of Hydrogen Utilisation in Industrial-Scale Applications: Material Challenges
- 2023Hydrogen Embrittlement in Industrial Applications
- 2018Effect of sodium in brown coal ash transformations and slagging behaviour under gasification conditionscitations
- 2013Corrosion coupon evaluation under pilot-scale CO2 capture conditions at an Australian coal-fired power stationcitations
- 2012Linking laboratory data with pilot scale entrained flow coal gasification performance. Part 2: pilot scale testingcitations
- 2010New Insights into Coal Conversion and Slag Formation during Entrained Flow Gasification and their Impacts on Gasification Performance
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article
Effect of sodium in brown coal ash transformations and slagging behaviour under gasification conditions
Abstract
Alkali species in coal play an important role in mineral matter reactions during gasification. Brown coal ashes can be high in sodium (up to 20 wt%), which interacts with other minerals to significantly affect the formation of slag (liquid phase). At high temperatures, sodium in slag affects phase equilibria, liquidus temperature, and slag viscosity. We investigated phase transformations in brown coal ashes at 800–1000C and slags at 1200–1600C to study the behaviour of sodium species in the range of 3–15 wt% using X-ray powder diffraction, thermogravimetric analysis and electron probe microanalysis. Sodium species appeared in coal ashes in different forms, such as sulfates, carbonates, and alumina-silicates, resulting in different ash bulk compositions. After processing under gasification conditions, alkaline species react with other minerals and may result in the appearance of a liquid phase. In this study, the liquid-phase content of ashes generally increased with increasing sodium concentration. In slags, sodium often decreased the liquidus temperature and solids content below liquidus temperature. It results lower slag viscosity in sodium enriched slags.