In situ ultrasonic measurements: a powerful tool to control the synthesis of zeolites from coal fly ash
| Autor: | Erich Hums, Hasan Baser, Wilhelm Schwieger |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
In situ
Materials science Nucleation Mineralogy Context (language use) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Dynamic light scattering Chemical engineering Fly ash Hydrothermal synthesis Ultrasonic sensor 0210 nano-technology Zeolite |
| Zdroj: | Research on Chemical Intermediates. 42:7513-7532 |
| ISSN: | 1568-5675 0922-6168 |
| DOI: | 10.1007/s11164-016-2550-7 |
| Popis: | An in situ ultrasonic diagnostic technique was applied to monitoring the hydrothermal synthesis of zeolite A and X of clear solution extracted from alkaline fused class F coal fly ash. In this context, kinetic evaluations based on in situ ultrasonic diagnostic data displayed an important approach to study the synthesis process. The impact on nucleation and crystal growth was demonstrated by variation of a few relevant parameters such as reaction temperature, amount of water, Na2O and ageing time, including templated colloidal synthesis mixtures as model solution. To complement the kinetic analysis, ex situ techniques such as ICP, X-ray diffraction, scanning electron microscopy and dynamic light scattering were used to investigate liquid phase and reaction products extracted from the reaction mixture during the synthesis. |
| Databáze: | OpenAIRE |
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