关键词: 镁碱沸石;晶化;结晶度;形貌

Abstract: Ferrierite zeolite was synthesized by hydrothermal method using silica sol,sodium aluminate and ethylenedianmine as silicon source,aluminum source and organic template separately.The influence of synthsis factors such as crystallization time,crystallization temperature,alkalinity,ageing and the amount of seed on the crystallinity and crystal morphology were investigated.The samples were characterized by XRD and SEM.The result indicates that the pure ferrierite zeolite could be synthesized with a suitable alkalinity(0.12-0.15),crystallization temperature(160 ℃) and crystallization time(60 h).The higher the crystallization temperature,the bigger the crystal size was,but the crystallinity went up at first and then downd as the crystallization temperature increased.The crystallinity and crystal size increased initially as the crystallization time extended and stabilized afterwards.A suitable ageing temperature and time could reduce the crytal size, while the adding seed could change the morphology and size significantly.

Key words: ferrierite zeolite;crystallization;crystallinity;morphology