Abstract
Thermal treatment is the main force for crystallization and phase
transformation, the behavior of precursors on heating revels a lot of information about the possible phenomena involving stability, sensitivity and some predictive ability of zeolites. Thermo-gravimetric (T.G.) in combination with differential thermal analysis ( D.T.A.)The changes in precursor samples
including the structure collapse and phase transformation at high
temperatures were checked by recording T.G./DTA plots of low silica H-Y zeolites using SETERAM T.G.DTA-92 instrument in air atmosphere 30ml/// min. at a heating rate of 50c /min. the range of temperature studied using this instrument is from room temperature (RT) to 10000c. The selective samples of post Synthetic low silica zeolites obtained from odified form of z 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
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