The beta-zeolite synthesized by dry-gel conversion method without the use of sodium hydroxide: characterization and catalytic behaviors.
The nano-sizedbeta-zeolites were synthesized first time by dry gel conversion (DGC) method without the use of sodium hydroxide. Resultant beta-zeolites had particle size of 35-80 nm with SiO2/Al2O3 ratios in the range of 25-400. They had BET surface areas in the range of 290-750 m2 x g(-1) and the external surface area of 41-283 m2 x g(-1): cumulative surface areas were in the range of 420-1050 m2 x g(-1). Beta-Zeolites modified with alkaline earth and rare earth metal species, such as Ca, La, and Ce, were synthesized by the introduction of these metal nitrates during the dry-gel preparation. To evaluate catalytic properties of these zeolites, they were applied for the isomerization/cracking of hexane and the phenol octylation. The influence of Ca, La, and Ce oxides on the catalytic properties was also examined.
Department of Materials Science and Technology, Faculty of Engineering, Gifu University, Gifu 501-1193, Japan.
Ayyamperumal
A
Sakthivel
Akira
A
Iida
Kenichi
K
Komura
Yoshihiro
Y
Sugi