Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 202, Issue -, Pages 36-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2014.09.041
Keywords
Zeolitic water; Cation population; Cavities volume; Channels volume; Void volume
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The weight percent water content of various cation-exchanged forms of zeolites X and Y, two samples of natural clinoptilolite, and a synthetic analcime were studied. A simple linear relation was established between the weight percent water content of various cation-exchanged zeolite samples and the quantity V-eq (cat) which is the volume of a single hypothetical equivalent cation, representing the cation population of a zeolite. This goal was fulfilled by setting up a simple model of the zeolite in which the volume of its cavities and channels is occupied by water molecules and by the exchangeable cations. The proposed model indicates the presence of void volumes (the portion of the cavities and channels occupied neither by cations nor water molecules) and allows its evaluation. The linear relation found in this work may be used to estimate the water content of various cation exchanged forms of zeolites. (C) 2014 Elsevier Inc. All rights reserved.
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