Removal of cyclopentadiene from 1-octene by transition metal containing zeolites – Part 2: Stabilization of CoCaX zeolite by its cation distribution

Zeolite X successively exchanged with Ca 2+ and Co 2+ ions is an efficient absorbent for traces removal of cyclopentadiene from alkene mixtures. To understand this affinity and stability of the aluminosilicate with this combination of cations, detailed structure analyses of samples after ion exchang...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2007-06, Vol.103 (1), p.11-19
Main Authors: Denayer, Joeri F.M., Depla, Anouschka, Vermandel, Walter, Gemoets, Frederik, van Buren, Frederik, Martens, Johan, Kirschhock, Christine, Baron, Gino V., Jacobs, Pierre A.
Format: Article
Language:English
Subjects:
Cation distribution
Chemistry
Cobalt
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Guest molecules
Ion-exchange
Porous materials
Rietveld refinement
Surface physical chemistry
Zeolite X
Zeolites: preparations and properties
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Summary:Zeolite X successively exchanged with Ca 2+ and Co 2+ ions is an efficient absorbent for traces removal of cyclopentadiene from alkene mixtures. To understand this affinity and stability of the aluminosilicate with this combination of cations, detailed structure analyses of samples after ion exchange, calcination, and exposure to guest molecules have been performed. Rietveld analysis of X-ray powder diffractograms of samples of known composition revealed stabilizing effects of the cation distribution in the studied samples and the irreversible blocking of Ca ions in hidden structure positions, resulting in positioning of Co ions at positions available for interaction with guest molecules like 1-octene and cyclopentadiene.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2007.01.043