Influence of Peptization and Ethanol Washing on the Pore-Structure Evolution of Sol-Gel-Derived Alumina Catalyst Supports

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Nair, Jalajakumari and Nair, Padmakumar and Ommen van, Jan G. and Ross, Julian R.H. and Burggraaf, Anthonie J. and Mizukami, Fujio (1998) Influence of Peptization and Ethanol Washing on the Pore-Structure Evolution of Sol-Gel-Derived Alumina Catalyst Supports. Journal of the American Ceramic Society, 81 (10). pp. 2709-2712. ISSN 0002-7820

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Abstract:Alkoxide-derived boehmite precipitates were subjected to different post-precipitation treatments to obtain a peptized sol, an unpeptized slurry, and an ethanol-washed gel precipitate. These materials were dried further to obtain the corresponding gels. Changes in the surface area, porosity, and pore size with temperature and the phase-transformation behavior from gamma-alumina to alpha-alumina were studied using X-ray diffractometry, differential scanning calorimetry, and physical adsorption/desorption measurements. Gels that were obtained from the peptized sol retained the lowest porosity, in comparison to the ethanol-washed gel and the gel that was prepared from the aqueous slurry.

Item Type:Article
Copyright:© 1998 WileyInterscience
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Management and Governance (SMG)
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Link to this item:http://purl.utwente.nl/publications/58437
Official URL:http://dx.doi.org/10.1111/j.1151-2916.1998.tb02681.x
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