Mu Yanyan, Zhang Yu, Fan Jiangyang, Guo Cuili
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.
Ultrason Sonochem. 2017 Sep;38:430-436. doi: 10.1016/j.ultsonch.2017.03.043. Epub 2017 Mar 27.
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.
多年来，SSZ - 13沸石因其结构而被认为是用于催化剂和膜的有效材料，但长结晶时间是其工业应用的主要障碍。声化学辅助法被认为是一种潜在的预处理方法，它可以减少沸石以及其他微孔和介孔材料的形成时间。在这项工作中，通过在水热结晶之前进行超声预处理来制备SSZ - 13沸石。为了进行比较，还制备了采用传统预处理和水热法的样品。通过XRD、SEM、BET、FTIR、NMR和TGA对合成的粉末进行了表征。结果表明，通过超声辅助水热法合成的SSZ - 13在72小时内实现了完全结晶，比传统水热合成（120小时）快得多。此外，与传统老化方法相比，超声预处理对最终产物的结构性能影响很小。
