The Influence of the Synthesis Pathway on the Morphology of Zeolite Beta Crystals (CROSBI ID 695581)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | domaća recenzija
Podaci o odgovornosti
Landripet, Ivana ; Puškarić, Andreas ; Bronić, Josip ;
engleski
The Influence of the Synthesis Pathway on the Morphology of Zeolite Beta Crystals
The BEA framework topology attracts much attention because of the three‐dimensional large‐pore channel system, large available micropore volume, and the presence of active sites in different concentrations that are useful in a number of acid‐catalyzed reactions. Intracrystalline diffusion of the reactants and products within zeolite crystals is limited, and can be avoided reducing the size of the crystals to nanoscale or by introducing mesoporous voids. Efficiency of the catalytic process can be improved by increasing the number of active places (i.e. Lewis and Brønsted acid places). Samples of hierarchical zeolite beta was made by a feasible one‐pot (one‐step) method, which is suitable for application in industrial production. Introduction of mesoporous voids (hierarchical structure of the crystals) was obtained using additional mesoporous template (e.g. CTAB) during catalyst synthesis, or by postsynthesis treatment of classically synthesized microcrystals by dealumination/desilication. Crystalline size and morphology was adopted by the addition of ammonium fluoride. Fluoride ions have a structure‐directing role and induce formation of the nanosized crystals.The synthesis resulted in micro‐ and mesoporous zeolite beta (hierarchical structure) with micrometer and nanometer size crystals, what is confirmed using characterization by infrared spectroscopy, X‐ray powder diffraction, scanning electron microscopy, particle size analysis and infrared physisorption measurements.
zeolite ; mesoporous beta ; morphology ; CTAB
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Podaci o prilogu
211-211.
2019.
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objavljeno
Podaci o matičnoj publikaciji
26th HSKIKI Book of Abstracts
Podaci o skupu
26. hrvatski skup kemičara i kemijskih inženjera (26HSKIKI) ; 4. simpozij Vladimir Prelog
poster
09.04.2019-12.04.2019
Šibenik, Hrvatska