Naslov
The role of preparation way of zeolite ZSM-5 crystals on their acid places

Autori
Bronić, Josip ; Medak, Glorija ; Landripet, Ivana ; Puškarić, Andreas ; Antonić Jelić, Tatjana ; Bosnar, Sanja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
4th EAZC Book of Summaries / - , 2019

Skup
4th Euro Asia Zeolite Conference (EAZC)

Mjesto i datum
Taormina, Italija, 27.01.2019. - 30.01.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Zeolite ; ZSM-5 ; wet impregnation ; acid sites

Sažetak
One of the most important factors in zeolite catalyst for methanol-to-olefine conversion (MTO) is the number and accessability of “acid places”. The number of the acid places (Brönstedt or Lewis) largely depends on the way of the catalyst preparation. Generaly, catalyst with more Al content within the framework, have more acid places. On the other hand, their accessability towards MTO reaction can be limited to the thin subsurface layer within crystals, due to the difficulties of the intracrystalline diffusion of the reactants and products. In this paper we have prepared hierarchical ZSM-5 crystals using several methods for synthesis: classical hydrothermal synthesis followed by etching (TPAOH/NaOH), synthesis with microporous (TPAOH) and mesoporous template (CTAB), postsynthesis treatment by wet impregnation, in order to increase the number of heteroatoms (Al, Sn) in the zeolites framework. Results shows substantial increase in the number of acid places after wet impregnation process.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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