engleski

The effect of aluminium source and alkali cations on BEA- and MFI-type zeolite formation

The synthesis of BEA- and MFI-type zeolites was studied in a system that in the all-silica form remains amorphous upon hydrothermal treatment at 150 and 180 °C. In the Al containing systems the initially formed phase is BEA-type zeolite. MFI-type material is formed once the reaction temperature is increased. Moreover, the addition of Na+/K+ to silicate mixture also yields MFI-type materials. The collected data indicate distinct formation mechanisms of these two types of materials.

aluminium source ; alkali cations zeolite formation ; MFI ; BEA

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