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Ash particles in gasified lignite chars were analyzed by a computer-controlled scanning electron microscope (CCSEM). The reactions between mineral particles and the fate of dispersed inorganic species which are contained in the Beulah-Zap lignite are deduced on the basis of the CCSEM method. Interaction among discrete mineral particles was not significant during gasification below 800°C. On the other...
For a more accurate assessment of the reactivity and behaviour of fly ash, a test procedure based on heat of hydration was developed. The technique uses a Dewar flask or a modified oxygen bomb calorimeter to determine the temperature change and rate of change after the addition of water to fly ash. X-ray diffraction is performed on the hydrated material to record mineralogical changes after the...
A test procedure based on heat of hydration was developed to assess more accurately the reactivity and behaviour of fly ash for utilization. The technique uses a Dewar flask or a modified oxygen bomb calorimeter to determine the temperature change and rate of change after the addition of water to fly ash. X-ray diffraction is performed on the hydrated material after the hydration test to follow...
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