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Template-free synthesis of ZSM-5 type zeolite layers on porous alumina disks
Date
2007-01-01
Author
Kalıpçılar, Halil
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ZSM-5 crystals were synthesized from template-free batches oil macroporons alpha-alumina (risks. The SiO2/Al2O3 ratio of the synthesis gel influenced the crystal morphology, surface coverage and intergrowth among the crystals. Prismatic ZSM-5 crystals covered the disk surface when the SiO2/Al2O3 ratio of the batch was higher than too, whereas spherical polycrystalline particles of ZSM-5 were obtained from batches with a SiO2/Al2O3 ratio of 80. Mordenite type zeolite was formed on the disk surface due to the incorporation of alumina dissolved from the disk when the time of crystallization was extended. The effects of silica source and seeding of the support surface with 0.3 and 2 mu m ZSM-5 crystals on the morphology of seolite layer were also investigated. The purity, surface coverage and SiO2/Al2O3 ratio of ZSM-5 crystals increased in the order of silica sol containing methanol, silica sol, and silicic acid. Seeding decreased the length of prismatic ZSM-5 crystals from 45 mu m 10 mu m and increased the surface coverage.
Subject Keywords
ZSN4-5
,
Template-free synthesis
,
Zeolite layer
,
Zeolite membrane
URI
https://hdl.handle.net/11511/55959
Journal
TURKISH JOURNAL OF CHEMISTRY
Collections
Department of Chemical Engineering, Article
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H. Kalıpçılar, “Template-free synthesis of ZSM-5 type zeolite layers on porous alumina disks,”
TURKISH JOURNAL OF CHEMISTRY
, pp. 233–242, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55959.