English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/110266
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 11 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Effect of temperature and alkaline concentration on metakaolin leaching kinetics

Autor Granizo, N.; Palomo, Ángel; Fernández-Jiménez, Ana
Palabras clave Alkaline activation
Aluminosilicate gels
Zeolite
Metakaolin
Fecha de publicación 2014
EditorPergamon Press
Citación Ceramics International 40: 8975- 8985 (2014)
ResumenThis study aims to advance in the understanding of how alkaline concentration and temperature affect metakaolin dissolution and hydrolysis and the characteristics of the reaction products formed. Two working temperatures, 25 and 85 °C, and two alkaline concentrations, 5- and 8-M NaOH, were studied. The findings showed that metakaolin dissolution is a three-stage process. A very short period of rapid incongruent MK dissolution resulting in [Al]>[Si] is followed by a process of moderate speed and duration in which [Al]≤[Si], denoting congruent, synchronised dissolution and lastly by a slow, later age process in which, under very vigorous conditions, [Si]>[Al], indicative of incongruent dissolution. The results also revealed that soluble species do not necessarily reflect the ultimate structure of the reaction products formed. The activator concentration and especially temperature affect process kinetics as well as thermodynamics, although much less intensely. © 2014 Elsevier Ltd and Techna Group S.r.l.
URI http://hdl.handle.net/10261/110266
DOI10.1016/j.ceramint.2014.02.071
Identificadoresdoi: 10.1016/j.ceramint.2014.02.071
issn: 0272-8842
Aparece en las colecciones: (ICMM) Artículos
(IETCC) Artículos
(CFMAC-IEM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.