NDLI: Characterization of Y zeolites dealuminated by solid-state reaction with ammonium hexafluorosilicate

Content Provider	Springer Nature Link
Author	Pires, João Carvalho, Ana Pinto, Moisés Rocha, João
Copyright Year	2006
Abstract	In the present work the solid-state dealumination of Y zeolite with ammonium hexafluorosilicate for various reaction times was studied. A detailed characterization of the porosity of the samples, and their hydrophobic-hydrophilic properties, was made. The characterization techniques used, besides the low temperature nitrogen adsorption and the room temperature water adsorption, include also the FTIR, the powder XRD and the $^{27}$Al and $^{29}$Si MAS NMR. These techniques showed evidence for the complex mechanism of dealumination that for sufficiently long times of reaction allows the partial reconstitution of the structure. Due to this mechanism the evolution of the Si/Al ratio, as well as the porosity and the hydrophobic-hydrophilic properties, do not run monotonically with the time.
Starting Page	107
Ending Page	114
Page Count	8
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	13
Issue Number	2
e-ISSN	15734854
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-01-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Y zeolite Si/Al ratio Dealumination Ammonium hexafluorosilicate Porosity Physical Chemistry Catalysis Characterization and Evaluation Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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Characterization of Y zeolites dealuminated by solid-state reaction with ammonium hexafluorosilicate