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Structural and morphological transformations of the (NH4, Na)-exchanged zeolites 4A, 13X and synthetic mordenite by thermal treatment

Kosanović, Cleo; Subotić, Boris; Ristić, Alenka (2002) Structural and morphological transformations of the (NH4, Na)-exchanged zeolites 4A, 13X and synthetic mordenite by thermal treatment. Croatica Chemica Acta, 75 (3). pp. 783-792. ISSN 0011-1643

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Abstract

Thermal treatment of (NH4, Na)-exchanged zeolites 4A and 13X results in the formation of an amorphous phase (T < 1000 degreesC) and a crystalline phase of mullite at temperatures above 1000 degreesC. No structural changes have been noticed for the (NH4, Na)-exchanged synthetic mordenite treated under the same conditions. Scanning electron microscopy (SEM), X-ray powder diffraction, Fourier transform infrared (FT-IR) spectroscopy and particle size analysis were used to characterize the initial materials and the obtained products.

Item Type: Article
Uncontrolled Keywords: ion exchanged zeolites; thermal transformations; pseudomorphic transformation; mullite; sol-gel precursors; aluminosilicate gels; mullite gels; phase; alumina; composites; evolution; powders; silica
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Materials Chemistry
Projects:
Project titleProject leaderProject codeProject type
Istraživanje procesa kristalizacije i primjene zeolitaBoris Subotić0098060MZOS
Istraživanje procesa kristalizacije i ionske zamjene zeolitaBoris Subotić00980901MZOS
Depositing User: Boris Subotić
Date Deposited: 18 Nov 2013 14:30
Last Modified: 28 Feb 2014 12:38
URI: http://fulir.irb.hr/id/eprint/969

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