Effect of ultrasound pretreatment on the hydrothermal synthesis of SSZ-13 zeolite

Yanyan Mu; Yu Zhang; Jiangyang Fan; Cuili Guo

doi:10.1016/j.ultsonch.2017.03.043

Effect of ultrasound pretreatment on the hydrothermal synthesis of SSZ-13 zeolite

Ultrason Sonochem. 2017 Sep:38:430-436. doi: 10.1016/j.ultsonch.2017.03.043. Epub 2017 Mar 27.

Authors

Yanyan Mu¹, Yu Zhang¹, Jiangyang Fan¹, Cuili Guo²

Affiliations

¹ School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
² School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China. Electronic address: gcl@tju.edu.cn.

PMID: 28633844
DOI: 10.1016/j.ultsonch.2017.03.043

Abstract

SSZ-13 zeolite has been identified as effective material for catalysts and membranes for years because of its structure, but the long crystallization time is the main obstacle for the industry application. The sonochemical-assisted method was identified as one of the potential pre-treatment methods which could reduce the formation duration of zeolites as well as other microporous and mesoporous materials. In this work, zeolite SSZ-13 was prepared by ultrasound pretreatment prior to hydrothermal crystallization. For comparison, samples by the conventional pretreatment and hydrothermal method were also prepared. The synthesized powders were characterized by XRD, SEM, BET, FTIR, NMR and TGA. The results showed that the complete crystallization of SSZ-13 synthesized by the ultrasound-assisted hydrothermal method was achieved within 72h, and much faster than conventional hydrothermal synthesis (120h). Furthermore, the ultrasound pretreatment showed very little effect on the structure properties of the final product compared with the conventional aging method.

Keywords: Crystallization time; Hydrothermal synthesis; SSZ-13 zeolite; Ultrasound pretreatment.