THF-FER沸石的系列研究Ⅲ.晶体结构

Studies on THF-FER Zeolite III. Crystal Structure

用SEM ,HRTEM ,SAED和XRD拟合等方法研究了在四氢呋喃 (THF) Na2 O SiO2 Al2 O3 H2 O体系中水热合成的高硅Na THF FER沸石的晶体结构、孔道定向 ,以及不同因素对晶胞体积的影响 .通过与全硅FER沸石和K Na FER沸石对比实验证明 ,片状的THF FER沸石晶体与全硅FER沸石晶体骨架结构及晶体生长择优取向相同 。

SEM, HRTEM, SAED and XRD simulation were used to investigate the crysta l structure, channel direction and cell parameters of a high-silica THF-FER ze ol ite, which was synthesized in the reactant system of tetrahydrofuran (THF)-Na 2O- SiO 2-Al 2O 3-H 2O. The results of comparable experiments with siliceous F ER zeolite and K-Na-FER zeolite confirm that a platelet-shaped crystallite of THF-FER pos sesses the same micro-structure and preferential orientation as that of silice ous FER zeolite crystals, belonging to Pnnm space group.