物理化学学报 >> 1993, Vol. 9 >> Issue (06): 735-739.doi: 10.3866/PKU.WHXB19930604

研究论文 上一篇    下一篇

KCl、NaCl在分子筛载体上的分散阈值研究

谢有畅; 汪传宝; 唐有祺   

  1. 北京大学物理化学研究所,北京 100871
  • 收稿日期:1992-04-29 修回日期:1992-06-27 发布日期:1993-12-15
  • 通讯作者: 谢有畅

Dispersion Capacities of KCl and NaCl in Zeolites

Xie You-Chang; Wang Chuan-Bao; Tang You-Qi   

  1. Institute of Physical Chemistry, Peking University, Beijing 100871
  • Received:1992-04-29 Revised:1992-06-27 Published:1993-12-15
  • Contact: Xie You-Chang

摘要: 采用高温衍射仪研究了KCl和NaCl. 和在不同分子筛载体内孔和内表面的分散阈值. 实验结果表明, 分散阈值显著地与烘烤温度有关, 烘烤温度愈高, 分散阈值愈大. 吸附水和固态离子交换反应也影响分散阈值大小. 用盐类溶液浸渍分子筛在低温烘烤时的分散效果与高温加热盐类和分子筛干混样品的分散效果大不相同. 例如, 浸渍时KCl在分子筛载体上分散很少, 这主要归因于吸附水对KCl的竞争吸附.

关键词: 分子筛载体, 自发分散, 分散阈值, 分散阈值与温度的关系

Abstract: High-temperature X-ray diffractometer is employed to study the dispersion capacities of KCI and NaCl in zeolite supports. The capacities are strongly affected by temperature. The higher the temperature is, the greater the capacities are. It was also found that the capacity obtained by impregnating and drying at low temperature is much smaller than that obtained by impregnating and heating at high temperature. For example, only a small amount of KCl can disperse into NaA Zeolite pores by impregnating, and this is most likely owing to the competition adsorption of water and the salt in zeolite pores.

Key words: Zeolite support, Spontaneous dispersion, Dispersion capacity, Influence of temperature on capacity