纳米NaY分子筛的制备及其晶化过程  

Synthesis and crystallization process of nano-sized NaY zeolite

作　　者：杨良[1] 刘雪颖[1,2] 何捍卫[1] 周海生[1] 解东梅[1] 王晓[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083 [2]广西工学院生物与化学工程系,柳州545006

出　　处：《粉末冶金材料科学与工程》2013年第2期270-275,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：粉末冶金国家重点实验室自主课题(20110930Z)

摘　　要：以偏铝酸钠和工业级水玻璃为原料，在没有加入有机添加剂的条件下，采用水热晶化法，通过3步陈化再晶化成功制备出纳米NaY分子筛。通过XRD、SEM、TEM、FR-IR和BET等检测手段系统表征样品的微观结构；并研究其晶化过程。结果表明，在晶化温度为100℃、晶化时间为8h、导向剂加入量为20％的条件下，制备出比表面积为909m2／g、孔体积为0．41cm3／g、孔径分布在0．7nm左右、晶粒粒度集中分布在40～60nm之间的纳米NaY分子筛。Nano-sized NaY zeolite were hydrothermally synthesized via a three-stage ageing using sodium silicate and sodium aluminate as raw materials, without adding any organic additives. The microstructure and crystallization process of the samples were characterized using XRD, SEM, TEM, FR-IR and BET. The results show that, when the crystallization temperature is 100 ℃, the crystallization time is 8h and the amount of direction agent is 20%, the BET area of the as-synthesized Nano-sized NaY zeolite is 909.667 m2/g, the pore volume is 0.407 9 cm3/g, and the microporous size distribution concentrates is mainly around 0.7 nm and the particles sizes are in the range of40-60 nm.

关 键 词：纳米NaY分子筛 三步陈化 晶化 导向剂 

分 类 号：TQ424.25[化学工程]