ISSN:
1573-1111
Keywords:
FER type zeolite
;
synthesis
;
ion exchange
;
structural characterization
;
sorption
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008166814219
