XRD and MAS-NMR investigation of synthesized zeolite from 2:1 Tunisian clays: Effect of concentration of NaOH solution on the final product nature

摘要

The aim of this work is to study the effect of NaOH solution concentration on the growth and nature of synthesized zeolite from 2:1 Tunisian clays. Preliminary treatment was adopted to prepare the starting sample that is placed in contact with NaOH solution at vari able concentration. A specific hydrothermal reactor, (allowing the control of pH＞9, tempera ture and a continuous stirring of the sample in the NaOH solution) was used to achieve these synthesis. This study was achieved using correlation between results obtained from XRD and MAS-NMR analysis. Obtained result showed that, for 1.5N concentration value the final complex present characteristic XRD and MAS NMR line of zeolite P. For 3N solution con centration zeolite HS is obtained.