首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Synthesis, Ion-exchange, Structural Characterization and Adsorption of K, Na-FER Type Zeolite
Authors:Yingcai Long  Minghua Ma  Yaojun Sun  Huiwen Jiang
Institution:(1) Department of Chemistry, Fudan University, Shanghai, 200433, P.R. China;(2) Center of Analysis and Measurement, Fudan University, Shanghai, 200433, P. R. China
Abstract:Synthesis of K, Na -FER type zeolite wasstudied in the reactant system ofK 2O-–Na 2O-–Al 2O 3-–SiO 2-–CO 3-–HCO 3-ndash;H 2O.Sodium silicate, silica sol andfumed silica were tested as the silica source, andsolid aluminum sulfate, aluminum hydroxide andmeta-kaolinite as the alumina source. The startingmaterials, the composition of the reactant, and thesynthesis temperature greatly influence the phasescrystallized. A pure phase of K, Na-FER zeolite washydrothermally prepared at 208 °C with sodiumsilicate and solid aluminum sulfate as startingmaterials. The optimum composition of the reactantfor synthesis of the pure FER zeolite was determined. Chemical analysis, XRD, FT-IR, 29Si and 27AlMAS NMR, TG/DTA, and adsorption of nitrogen, methanoland n-hexane were used to characterize the zeolite andcompared with the reference sample of perfect singlecrystals of siliceous FER zeolite. The content ofK+and Na+in the zeolite decreases graduallywith the times of the treatment ofion-exchange/calcination, leading to an increase in theadsorption capacities of nitrogen and methanol, anda decrease of the loading of n-hexane. The location ofthe K+, the stacking faults, and dealumination of thezeolite framework are discussed based on the ion exchange and adsorption behavior.
Keywords:FER type zeolite  synthesis  ion exchange  structural characterization  sorption
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号