The effect of synthesis parameters on the structure of NaA zeolite

LTA-type zeolite was synthesized via the hydrothermal method. The general formula of the synthesized zeolite was Al2O3: xSiO2: 3 Na2O: 130 H2O. By varying SiO2/Al2O3 molar ratio, reaction time and temperature, the effect of these parameters on the formation of the zeolite phase, the average crystal size and the crystallinity factor has been studied with the aid of Xray diffraction and scanning electron microscopy (SEM). It is found that SiO2/Al2O3 has the dominant effect on the formation of the zeolite phase. By increasing the reaction time both average crystal size and crystallinity increase significantly but reaction time has a minor effect on average crystal size.

کلیدواژه ها:

Hydrothermal synthesis ، NaA zeolite ، Crystallinity ، Crystal size ، synthesized zeolite