Synthesis of Zeolitic Materials Using as a Source of SiO₂ and Al₂O₃ Calcined Kaolin Waste

Abstract:

This paper has as main objective synthesize zeolitic materials in hydrothermal conditions using as the predominant source of Si and Al a waste in powder generated from kaolin processing industries for paper-coating from the Brazilian Amazon region, thus transforming a material of low commercial value in another with higher added value, and can thus be used in future in adsorption and catalysis. For this were tested compositions of the mixture with different molar ratios of Na₂O/Al₂O₃ and SiO₂/Al₂O₃ considering the effects time-temperature of crystallization. The starting material and the phases formed as synthetic products were characterized by XRD, SEM and FTIR. The results show that the methodology developed with metakaolinite from a thermically activated kaolin waste at 700 º C for 2h reacting in alkaline medium in the presence of an additional source of silica, zeolitic phases were obtained with structure FAU-type and GIS-type in the samples synthesized.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1349-1354
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1349
• Online since: August 2012
• Authors: Edemarino A. Hildebrando, Rômulo S. Angélica, Roberto Freitas Neves, Francisco Rolando Valenzuela-Díaz
• Keywords: Kaolin, Synthesis, Zeolite

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