期刊名称：Pakistan Journal of Analytical & Environmental Chemistry
印刷版ISSN：1996-918X
电子版ISSN：2221-5255
出版年度：2004
卷号：5
期号：1
页码：7-15
语种：English
出版社：National Centre of Excellence in Analytical Chemsitry
摘要：In this study,surface area and pore structure studies were carried out for cobalt,nickel,and copper-II-exchanged zeolite with the help of Quantasorb and Mercury Porosimeter techniques respectively. Values of surface area,micropore volume and characteristic energy for adsorbateadsorbent system were calculated by using BET and D-R equations respectively. It was observed that surface area of metal-exchanged zeolite increases after outgassing at 300oC and decreases at high levels of metal concentration due to partial collapse of the structure at the temperature of dehydration in vacuum. It was evident from the data of mercury porosimetery that micropore volume increases as metal concentration increases. Results showed that metal exchanged zeolites have good adsorption properties than parent zeolite-4A. Therefore,transition metals after exchange create a new surface with different thermodynamics and kinetics..
