The Role of Sub-colloidal (nano-sized) Precursor Species in Zeolites Crystallization
نویسندگان
چکیده
A comparison of different approaches of the formation and evolution of sub-colloidal precursor species during crystallization of MFI-type zeolites showed that, although the formation of sub-colloidal precursor species is almost the same in both homogeneous [initially clear (alumino)silicate solutions] and heterogeneous [(alumino)silicate hydrogels], their further evolution strongly depends on the composition of the reaction mixture, especially presence (heterogeneous systems) or absence (homogeneous systems) of the solid phase as well as presence/absence of aluminium. These differences have been showed and explained through the analysis of relevant processes of crystallization of MFI-type zeolites.
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