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IJEMS Vol.12(3) [June 2005] >


Title: Synthesis and characterization of NaX and Cu-exchanged NaX zeolites from silica obtained from rice husk ash
Authors: Dalai, Ajay K
Pradhan, Narayan C
Rao, Musti S
Gokhale, K V G K
Issue Date: Jun-2005
Publisher: CSIR
IPC CodeC01B39/50
Abstract: Sodium X zeolite and a number of other zeolites such as PC, HS and analcime were synthesized using rice-husk ash as a source of silica. Also, a number of NaCuX zeolites were prepared by ion-exchange method with copper contents from 2.8 to 10.5 wt%. The products were characterized using X-ray diffraction analysis. The morphological characteristics of the prepared zeolites were also studied. The NaX zeolite exhibits typical octahedral form whereas analcime and zeolite PC have trapezohedral and spheroid forms, respectively. Differential thermal patterns of NaCuX zeolites revealed the presence of an initial sharp and intense endotherm for dehydration around 190-220oC followed by an exotherm around 830-860oC representing structural change and dissociation, which were confirmed by X-ray diffraction analysis.
Page(s): 227-234
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.12(3) [June 2005]

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