Abstract
Synthesis of stable boehmite sols and structural properties of the sol-gel-derived γ-alumina using alkoxides, commercial boehmite powders, and aluminum chloride were studied for cost-effective preparation of high quality γ-alumina granules. Stable boehmite sols could be prepared from aluminum butoxide, aluminum isopropoxide, and commercial boehmite powders but not from aluminum chloride. The stable sol-derived γ-alumina has large surface area and nanopore size with uniform pore size distributions. Mesoporous spherical γ-alumina granules were prepared by an oil-drop process from aluminum butoxide, aluminum isopropoxide and a commercial boehmite powder under specific conditions. The sol-gel-derived γ-alumina granules are better than the commercial γ-alumina granules in terms of the pore structure and mechanical strength. The successful synthesis of γ-alumina granules by the sol-gel method from the commercial boehmite powder provides a basis for large-scale, cost-effective production of the high quality γ-alumina granules for use as sorbents or catalysts in industrial processes.
Original language | English (US) |
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Pages (from-to) | 359-369 |
Number of pages | 11 |
Journal | Microporous and Mesoporous Materials |
Volume | 30 |
Issue number | 2-3 |
DOIs | |
State | Published - Sep 1999 |
Externally published | Yes |
Keywords
- Catalyst support
- Granulation
- Oil drop
- Sol-gel
- Sorbents
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials