Abstract
Thermal transformations of potassium-exchanged zeolite A and the X-ray amorphous material obtained by ball milling the potassium-exchanged zeolite A were investigated by different methods, such as differential thermogravimetric analysis (DTA), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. Controlled heating of crystalline, potassium-exchanged zeolite A causes a phase transformation in the sequence: [0.22 Na2O, 0.78 K2O]·Al2O3·2SiO2·3.48 H2O⇒amorphous⇒kalsilite+kaliophilite, while the heating of mechanochemically amorphous potassium-exchanged zeolite A results in its transformation into a mixture of kalsilite and kaliophilite. The differences in the pathways of the transformation processes are discussed in terms of the structural properties of the starting materials.
Similar content being viewed by others
References
D. W. BRECK, “Zeolite molecular sieves” (Wiley, New York, 1974) p. 759.
H. S. SHERRY, Adv. Chem. Ser. 101 (1971) 350.
N. M. BROOKE and L. V. C. REES, ibid. 101 (1971) 405.
R. M. BARRER and J. KLINOWSKI, Phil. Trans. (Lond.) 258 (1977) 637.
H. MIMURA and T. KANNO, Sci. Rep. Ritu 29A (1980) 102.
R. M. BARRER, “Hydrothermal chemistry of zeolites” (Academic Press, London, 1982) p. 239.
P. NORBY and H. FJELLVAG, Zeolites 12 (1992) 898.
V. DONDUR and R. DIMITRIJEVIĆ, J. Solid State Chem. 63 (1982) 46.
A. J. PERROTA and J. V. SMITH, Mineral Mag. 35 (1965) 588.
M. GREGORKIEWITZ, PhD thesis, Tecnische Hochschule, Darmstadt (1980).
C. KOSANOVIĆ, J. BRONIĆ, B. SUBOTIĆ, I. ĆMIT, M. STUBIČAR, A. TONEJC and T. YAMAMOTO, Zeolites 13 (1993) 261.
C. KOSANOVIĆ, A. ČIŽMEK, B, SUBOTIĆ, I. ŠMIT, M. STUBIČAR and A. TONEJC, ibid. 15 (1995) 51.
C. KOSANOVIĆ, J. BRONIĆ, A. ČIŽMEK, B, SUBOTIĆ, I. SMIT, M. STUBIČAR and A. TONEJC, ibid. 15 (1995) 247.
L. S. ZEVIN and L. L. ZAVYALOVA, “Kolichestvenniy rentgenographicheskiy phazovy analiz” (Nedra, Moscow, 1974) p. 37.
E. M. FLANIGEN, H. KHATAMI and H. A. SZYMANSKI, Adv. Chem. Ser. 101 (1971) 201.
R. AIELLO, F. CREA, A. NASTRO, B. SUBOTIĆ and F. TESTA, Zeolites 11 (1991) 767.
A. ALBERTI and G. VEZZALLINI, in Proceedings of the Sixth International Conference on Zeolites, edited by D. H. Olson and A. Bisio (Butterworth, Guildford, 1984) p. 843.
C. KOSANOVIĆ, A. ČIZMEK, B. SUBOTIĆ, I. ŠMIT, M. STUBIČAR and A. TONEJC, Zeolites 15 (1995) 632.
L. A. BURSILL and J. M. THOMAS, in Fifth International Conference on Zeolites: Recent Progress Report and Discussions, 2–6 June 1980, edited by R. Sersale, C. Collela and R. Aiello, Giannini, Naples, 1981, p. 25.
Z. GABELICA, J. B. NAGY, G. DEBRAS and E. G. DEROUANE, Acta Chim. Hung. 119 (1985) 275.
O. OKAMURA, Y. TSURUTA and T. SATOH, Gyps. Lime 206 (1987) 23.
B. SUBOTIĆ, A. M. TONEJC, D. BAGOVIĆ, A. ČIŽMEK and T. ANTONIĆ, Stud. Surf. Sci. Catal. 84A (1984) 259.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
KOSANOVIC, C., SUBOTIC, B., SMIT, I. et al. Study of structural transformations in potassium-exchanged zeolite A induced by thermal and mechanochemical treatments. Journal of Materials Science 32, 73–78 (1997). https://doi.org/10.1023/A:1018514929882
Issue Date:
DOI: https://doi.org/10.1023/A:1018514929882