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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
Series/Report no.: C01B39/50
Abstract: Sodium X zeolite and a number of other zeolites such as P<sub>C</sub>, 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 P<sub>C</sub> 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 190-220<sup>o</sup>C followed by an exotherm around 830-860<sup>o</sup>C representing structural change and dissociation, which were confirmed by X-ray diffraction analysis.
Description: 227-234
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.12(3) [June 2005]

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