INVESTIGATION OF THERMAL AND STRUCTURAL PROPERTIES OF NATURAL AND ION-EXCHANGED ANALCIME

Year 2016, Volume: 17 Issue: 4, 724 - 734, 01.12.2016

MERYEM Sakızcı

https://doi.org/10.18038/aubtda.266863

Cited By: 3

Abstract

In this study, the thermal and structural properties of natural analcime
zeolite obtained from the Çanakkale-Küçükkuyu-Ayvacık region and its cationic forms (HA, FeA, AgA and
CuA) were characterized using a range of methods. These included X-ray
fluorescence (XRF), X-ray diffraction (XRD),
thermogravimetric analysis (TG), differential thermogravimetric analysis (DTG),
differential thermal analysis (DTA) and specific surface area measurement techniques. Cationic forms were
prepared by using 1 M HCl, 1 M Fe(NO₃)₃.9H₂O,
1 M AgNO₃ and 1 M Cu(NO₃)₂.3H₂O
solutions. Quantitative XRD analysis showed that the natural zeolite was mainly
composed of analcime accompanied by quartz, feldspar, montmorillonite and amorphous substances. AgA and HA samples showed different thermal and
structural behaviors due to their rearranged crystal structure and chemical
composition. Adsorption properties of samples were determined by using
adsorption isotherms and specific surface areas obtained by the
Brunauer-Emmet-Teller (BET) method. The specific surface areas of the
ion-exchanged analcime zeolites were found to be higher in comparison to
natural analcime. Among all the modified forms, it was found that the H-form of
the analcime sample has the largest surface area HA (41.88 m²/g).

Keywords

Zeolite, Analcime, N2 Adsorption, XRD

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