Effects of Synthesis Method on the Physicochemical Properties and Catalytic Activity of BEA Zeolite in Toluene Disproportionation

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发表日期：

2024年9月1日

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O. A. Ponomareva,
E. P. Andriako,
A. P. Dubtsova,
N. K. Vdovchenko,
V. A. Vorobkalo,
I. V. Dobryakova,
L. I. Rodionova,
O. V. Shutkina,
I. I. Ivanova

摘要

Abstract

A series of BEA-type zeolites with SiO₂/Al₂O₃ ratios of about 50 were synthesized by steam-assisted (SAC) and hydrothermal crystallization (HTC) in fluoride and alkaline media. Their physicochemical properties were characterized by low-temperature nitrogen adsorption, XRD, SEM, XRF, and NH₃-TPD. The catalytic performance was investigated in liquid-phase toluene disproportionation. The SAC-synthesized samples were distinguished by a higher concentration of acid sites. The BEAs prepared by SAC in alkaline media exhibited a higher activity in toluene disproportionation. The samples synthesized in fluoride media, both by steam-assisted and hydrothermal crystallization, proved to be comparable in activity.