Síntesis y caracterización de zeolita tipo FAU (Faujasita) a partir de arcillas de Ecuador

Abstract

Abstract: Synthesis of zeolite type Faujasite starting from three clays from southern Ecuador, has been studied in this work. The chemical composition of the clays was determined by FRX, to fix the composition of the synthesis mixture. It startedwith high temperature calcination of the clay with NaOH, for a certain time. The second stage washydrothermal crystallization in closed containers, with a previous aging at room temperature for 24 h, and crystallization at 90 °C for 24 h. The effect of temperature ofcalcinationtime and the Na2O/SiO2and H2O/Na2O molar ratios of the synthesis mixture was studied in the crystallization process. The final solid wasseparated by vacuum filtration and washed with running water. The starting clay and the synthesis products were characterized by DRX, FRX, specific area, and CO2 adsorption capacity. With the three clays studied, it was possible to obtain the Faujasite structure with good purity, and CO2 adsorption capacity greater than the original clays.