干燥和焙烧条件对VPO催化剂的影响

The Effects of Drying and Calcination on The Physical-Properties of VPO Catalysts.

关键词:  VPO 催化剂 干燥 焙烧 物理性质

Key words:  drying, calcination,VPO catalyst, physical-properties

摘要:

采用ＢＥＴ、ＸＲＤ、ＴＥＭ等测试手段，考察了三种没方法对改变焙烧温度或干燥条件下制备的ＶＰＯ催化剂的比表面积、晶相结构和粒子大小的影响。研究发现同种制备方法，焙烧或干燥条件不同，对ＶＰＯ催化剂物性有一定的影响。水相法制备时，焙烧温度升高，样品的比表面积减小，结晶度增加，粒子颗粒变大。有机相法制备时，焙烧温度对样品的比表面积影响不大，但超临界条件下干燥，可使催化剂比表面积增大。

Abstract:

VPO catalysts are prepared by three methods.BET,XRD and TEM techniques are used to investigate the effects of drying and calcination on the physical-properties of VPO catalysts. The results indicate the relations between the temperature of calcination and