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J. Korean Ceram. Soc. > Volume 33(9); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(9): 1064.
제올라이트 복합 분리막의 합성 및 특성화(I): ZSM-5계 제올라이트의 합성
현상훈, 김준학1, 송재권
연세대학교 세라믹공학과
1요업기술원 정밀요업과
Synthesis and Characterization of Zeolite Composite Membranes (I):Synthesis of ZSM-5 Type Zeolites
ABSTRACT
The synthetic conditions and characteristics of ZSM-5 type zeolites (ZSM-5/silicalite) for the preparation of the zeolite composite membranes for gas separation were investigated. ZSM-5 zeolites could be synthesized by the hydrothermal treatment of the mixture of colloidal silica sol aluminum nitrate sodium hydroxide and TPABr at a temperature range of 150-17$0^{circ}C$ in the autoclave. Silicalties were done from the solution of water glass water and TPABr. Their crystalline structures transformed from orthorhombic to monoclinic from and their pore structures of three-dimensional channels were opened as TPABr filling channels was burned off at the calcination temperature of 50$0^{circ}C$. The specific surface area of the calcined zeolite was about 360 m3/g and its surface property was hydrophobic. Crystal sizes of ZSM-5 and silicalite were 0.5-1.0${mu}{textrm}{m}$ and 8-10${mu}{textrm}{m}$ respectively having no change due to the calcination. In particular the shape and the size of the ZSM-5 type zeolite were sensitively varied with silica sources and concentrations of reaction solutions/sols.
Key words: ZSM-5 type zeolite, Hydrothermal treatment, TPABr template, Hydrophobic, Three-dimensional channed structure
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