Phase transformations during the zeolitization of fly ashes
| Autor: | Elena Isabel Basaldella, Andrea M. Pereyra, María Susana Conconi, Jorge Daniel Monzón |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Fly ashes
Pretreatment Hydrothermal synthesis Zeolites Mineralogy 02 engineering and technology PRETREATMENT complex mixtures Hydrothermal circulation HYDROTHERMAL SYNTHESIS chemistry.chemical_compound Phase (matter) Chemical Engineering (miscellaneous) Hydrothermal synthesis Reactivity (chemistry) Zeolite Waste Management and Disposal ZEOLITES Chemistry 020502 materials Process Chemistry and Technology technology industry and agriculture 021001 nanoscience & nanotechnology Pollution FLY ASHES 0205 materials engineering Chemical engineering Fly ash Composition (visual arts) 0210 nano-technology Sodium carbonate |
| Zdroj: | Repositorio Institucional Abierto (UTN) Universidad Tecnológica Nacional instacron:UTN |
| Popis: | The reactivity of a fly ash discarded from a thermoelectric power station was evaluated in terms of its hydrothermal conversion into NaA-containing products. The influence of ash pretreatments and the effect of changes in the synthesis mixture composition on the evolution of the solid phase toward its conversion into zeolitic materials were studied. Activation by milling was not as effective as alkaline fusion. The highest levels of fly ash reactivity were obtained by applying an alkaline fusion treatment using sodium carbonate at 800 °C. It was observed that this particular ash activation induces a solid reordering that generates crystalline materials identified as NaAlSiO2 polymorphs that in turn are easily transformed into zeolite structures. Synthesis conditions for ash zeolitization as high as 60% were established. Fil: Monzón, Jorge Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina Fil: Pereyra, Andrea Marisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina Fil: Conconi, María Susana. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina Fil: Basaldella, Elena Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|