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Title: Localization of residual water in alkali-metal cation-exchanged X and Y type zeolites
Authors: Kirschhock, Christine ×
Hunger, B
Martens, Johan
Jacobs, Pierre #
Issue Date: 2000
Publisher: Amer chemical soc
Series Title: Journal of Physical Chemistry B vol:104 issue:3 pages:439-448
Abstract: The arrangements of residual water and alkali-metal cations in zeolites Y and X have been determined by Rietveld refinement in combination with Fourier analysis of X-ray powder patterns. The sodium forms NaY and NaX as well as partially cation exchanged forms MNaY and MNaX (M = K, Rb, Cs) were studied. It was shown that only sodium participates in the interaction with the water molecules, therewith causing the formation of distinctive sodium-water structures in the large cavity system of the hosts. Heavier alkali-metal ions that are also present affect the formation of these structures in an indirect way by blocking cation positions for sodium. The results, gleaned from X-ray diffraction, were put into relation to temperature-programmed desorption (TPD) measurements, obtained from previous investigation of these zeolites.
URI: 
ISSN: 1089-5647
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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