Standard zeolites 4A and 13X have been synthesized and modified by reaction with dimethoxydimethylsilane, propyltrimethoxy silane, octyltrimethoxy silane and octadecyltrimethoxy silane, respectively. Themodified zeolites were analyzed by X-Ray diffractometry, FTIR spectrometry and water adsorptionmeasurements. Results showed that silane molecules bonded to the external surface of zeolite particleswith no chance of entering the zeolite porosity. Only “short-chain” silanes dimethoxydimethyl andpropyltrimethoxy grafting demonstrated having an influence on the hydrophilic behavior of the modifiedzeolites. The main effect was a shift of the adsorption isotherms in the low partial pressure range towardsa more hydrophobic trend, which represents an interesting result for adsorption application when low temperature regenerations are required.
|Titolo:||Organosilanes functionalization of alumino-silica zeolites for water adsorption applications|
BONACCORSI, Lucio Maria (Corresponding)
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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