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Received August 21, 2006
Accepted November 13, 2006
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Synthesis of nanocrystalline alumina by thermal decomposition of aluminum isopropoxide in 1-butanol and their applications as cobalt catalyst support
Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering,Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand 1Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakorn Pathom 73000, Thailand
Korean Journal of Chemical Engineering, May 2007, 24(3), 397-402(6), 10.1007/s11814-007-0068-9
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Abstract
Nanocrystalline alumina powders were prepared by thermal decomposition of aluminum isopropoxide (AIP) in 1-butanol at 300 ℃ for 2 h and employed as cobalt catalyst supports. The crystallization of alumina was found to be influenced by the concentration of AIP in the solution. At low AIP content, wrinkled sheets-like structure of γ-Al2O3 was formed, while at high AIP concentrations, fine spherical particles of χ-Al2O3 were obtained. It was found that using these fine particles alumina as cobalt catalyst supports resulted in much higher amounts of cobalt active sites measured by H2 chemisorption and higher CO hydrogenation activities.
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References
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Praserthdam P, Inoue M, Mekasuvandumrong O, Tanakulrungsank W, Phatanasri S, Inorg. Chem. Commu., 3(11), 671 (2000)
Inoue M, Otsu H, Kominami H, Inui T, Ind. Eng. Chem. Res., 35(1), 295 (1996)
Reuel RC, Bartholomew CH, J. Catal., 85, 63 (1984)
Jongsomjit B, Panpranot J, Goodwin JG, J. Catal., 215(1), 66 (2003)
Anderson RB, The Fischer-Tropsch synthesis, Academic Press, San Diego (1984)
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