Hydrothermal Synthesis of Zeolite from Coal Class F Fly Ash. Influence of Temperature


  • S. Goñi Instituto de Ciencias de la Construcción "Eduardo Torroja"(IccET) (CSIC), Madrid
  • R. Peña Instituto de Ciencias de la Construcción "Eduardo Torroja"(IccET) (CSIC), Madrid
  • A. Guerrero Instituto de Ciencias de la Construcción "Eduardo Torroja"(IccET) (CSIC), Madrid




zeolites, wastes, hydrothermal treatment, XRD, thermal analysis


The influence of temperature of alkaline hydrothermal treatment on the conversion in zeolite of Spanish coal low calcium-fly ash (ASTM class F) is presented in this work. Zeolite Na-P1 gismondine type (Na6Al6Si10O32.12H2O) was formed at the temperature of 100ºC, which transformed in zeolite; analcime-C type (Na(Si2Al)O6H2O) and sodalite (1.08 Na2O.Al2O3.1.68SiO2.1.8H2O) at 200ºC together with traces of tobermorite-11Å (Ca5(OH)2Si6O16.4H2O). At this temperature the 100% of the fly ash reaction was allowed. An equivalent study was carried out in water as reference. The zeolite conversion of the fly ash was characterized by X ray diffraction (XRD), FT infrared (FTIR) spectroscopy, surface area (BET-N2) and thermal analyses.


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How to Cite

Goñi, S., Peña, R., & Guerrero, A. (2010). Hydrothermal Synthesis of Zeolite from Coal Class F Fly Ash. Influence of Temperature. Materiales De Construcción, 60(298), 51–60. https://doi.org/10.3989/mc.2010.47808



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