biostudies-literatureBok TOMinistry of Education and Science of the Russian Federation38505-38514https://www.ebi.ac.uk/biostudies/studies/S-EPMC9057372biostudies-literatureUnknown10(63)The mechanism of seeding of zeolite BEA via steam assisted conversion has been studied using BEA seeds with different composition. The catalysts are characterized by X-ray diffraction, scanning and transmission electron microscopy, nitrogen adsorption-desorption, Hg-porosimetry, X-ray fluorescence and TPD of ammonia, and evaluated in benzene alkylation with propene. The results show that variation of the SiO2/Al2O3 ratio from 25 to 250 in BEA seeds changes the mechanism of seeding from "core-shell" to a "dissolution" mechanism, which can serve as a tool for engineering the morphological, textural and catalytic properties of BEA zeolites. Al-rich seeds (SiO2/Al2O3 = 25) do not dissolve during gel preparation and initiaRSC advancesEngineering of zeolite BEA crystal size and morphology via seed-directed steam assisted conversion.PMC9057372The State Program of TIPS RASBok TOIvanova IIAndriako EPKnyazeva EEfalseEngineering of zeolite BEA crystal size and morphology via seed-directed steam assisted conversion.The mechanism of seeding of zeolite BEA via steam assisted conversion has been studied using BEA seeds with different composition. The catalysts are characterized by X-ray diffraction, scanning and transmission electron microscopy, nitrogen adsorption-desorption, Hg-porosimetry, X-ray fluorescence and TPD of ammonia, and evaluated in benzene alkylation with propene. The results show that variation of the SiO2/Al2O3 ratio from 25 to 250 in BEA seeds changes the mechanism of seeding from "core-shell" to a "dissolution" mechanism, which can serve as a tool for engineering the morphological, textural and catalytic properties of BEA zeolites. Al-rich seeds (SiO2/Al2O3 = 25) do not dissolve during gel preparation and initia2020-01-01T00:00:00Z2020 Oct2025-04-04T20:50:26.816Z2025-04-04T20:50:26.816ZS-EPMC90573723551754810.1039/d0ra07610d