论文部分内容阅读
利用水热法合成了 Ｓｉ、Ｚｒ取代型的ＡＰＯ－１１分子筛，井利用ＸＲＤ、ＳＥＭ、ＤＧ－ＤＴＡ等多种手段表征了其晶体结构、表面形貌、孔分布等特性。研究结果显示，ＡＰＯ－ｌｌ、ＳＡＰＯ－１１与ＺＡＰＯ－１１具有相同的晶体结构，不同的表面形貌－ＡＰＯ－１１与ＳＡＰＯ－１１为球形颗粒，而ＺＡＰＯ－１１为棒状晶体，推测这可能与ｐＨ对晶体生长的导向作用有关；三种分子筛除了具有为０．４５ ｎｍ的特征微孔孔径外，还形成了３．８ ｎｍ～３．９ ｎｍ的中孔；ＥＤＸ与孔分布结果显示，Ｚｒ主要以氧化物的形式沉积在分子筛的孔道内，而Ｓｉ部分进入了 ＡＰＯ－１１分子筛的骨架；三种分子筛的热稳定性良好，分解温度超过１０００℃。
The Si, Zr-substituted APO-11 molecular sieves were synthesized by hydrothermal method. The crystal structure, surface morphology and pore distribution were characterized by XRD, SEM and DG-DTA. The results show that APO-ll, SAPO-11 and ZAPO-11 have the same crystal structure. Different surface morphologies -APO-11 and SAPO-11 are spherical particles, while ZAPO-11 is a rod- pH on the crystal orientation of the role of the growth; in addition to the three molecular sieve has a characteristic pore diameter of 0.45 nm, but also formed a 3.8 nm ~ 3.9 nm mesopores; EDX and pore distribution results show that Zr Mainly in the form of oxides deposited in the molecular sieve pore, and Si part of the APO-11 molecular sieve into the framework; three zeolites good thermal stability, the decomposition temperature exceeds 1000 ℃.