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Volume : III, Issue : IV, May - 2013 XRD AND SEM STUDY OF POST SYNTHETIC MODIFIED LOW SILICA ZEOLITES K.U.GORE Published By : Laxmi Book Publication Abstract : The idea of introducing foreign atom in to the crystal lattice of the solid zeolites
are to change their catalytic activity and selectivity of the products and the reactants The
selective samples of post Synthetic low silica modified Na-Y zeolite are studied in the
present paper. The post synthetic modification of the original samples affect the pore
dimension, crystalinity, void volume, frame work structure, catalytic activity, selectivity,
stability etc of the original sample of the zeolite. Na-Y zeolite was made available from
Union carbide corporation, USA (Linde,SK-40) for the post Synthetic modification
having ratio of Si//\Al=2.4.It is modified to NH4-Y form by ion exchange, using 2N
ammonium Nitrate (NH4NO3 )solution. The NH4-Y zeolite is washed several times with
de-ionized hot water while filtering it.This highly crystallineNH4-Y sample was used
to prepare different samples of low silica Ti-Y zeolite by using K2 Tio(C2O4) 2 2H2O
(Potassium Titanyl oxalate) one of the best source as it is clearly water soluble and
found to give easy access for frame work incorporation of Titanium by using
appropriate mole fraction of Potassium Titanyl oxalate. The samples prepared was ion
exchanged by 2N ammonium Nitrate (NH4NO3 ) solution thrice to remove any traces of
ion exchanged alkali Sault K as per above procedure after each sample prepared. The
XRD, and ESR techniques are mainly applied along with other techniques for the
physical study and to identify the material prepared. Keywords : Article : Cite This Article : K.U.GORE, (2013). XRD AND SEM STUDY OF POST SYNTHETIC MODIFIED LOW SILICA ZEOLITES. Indian Streams Research Journal, Vol. III, Issue. IV, http://oldisrj.lbp.world/UploadedData/2327.pdf References : - T he substitution of Ti in the frame work location in the Y zeolite can be confirmed by using XRD spectroscopic technique also.
- XRD spectroscopic technique can be used in identification of isomorphic substitution metal from its bond length with its oxidized form.
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- Myat Myat. Ph.D. Thesis Department of Eng. Chemistry, Yangon Technological university Mynmar (2003)
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- Nidhi Dubey et al. Applied catalysis A General303 March2006 p152-157.
- Pham T.H. et..al., Studies in surface science and catalysis Vol. 159 p-197-200, 2006 (1990).
- Myat Myat. Ph.D. Thesis Department of Eng. Chemistry, Yangon Technological university Mynmar (2003)
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