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Received August 8, 2003
Accepted September 24, 2003
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Characterization of Zirconium Sulfate Supported on TiO2 and Activity for Acid Catalysis
Department of Industrial Chemistry, Engineering College, Kyungpook National University, Daegu 702-701, Korea
jrsohn@knu.ac.kr
Korean Journal of Chemical Engineering, November 2003, 20(6), 1030-1036(7), 10.1007/BF02706933
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Abstract
A series of Zr(SO4)2/TiO2 catalysts were prepared by impregnation of powder TiO2 with an aqueous solution of zirconium sulfate. No diffraction line of zirconium sulfate was observed up to 30 wt%, indicating good dispersion of Zr(SO4)2 on the surface of TiO2. The high catalytic activities of Zr(SO4)2/TiO2 for both 2-propanol dehydration and cumene dealkylation were related to the increase of acidity and acid strength due to the addition of Zr(SO4)2. Zr(SO4)2/TiO2 containing 25% zirconium sulfate and calcined at 400 ℃ exhibited maximum catalytic activities for 2-propanol dehydration and cumene dealkylation. The catalytic activities for these reactions were correlated with the acidity of catalysts measured by the ammonia chemisorption method.
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References
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Satsuma A, Hattori A, Mizutani K, Furuta A, Miyamoto A, Hattori T, Murakami Y, J. Phys. Chem., 92, 6052 (1988)
Saur O, Bensitel M, Saad ABM, Lavalley JC, Tripp CP, Morrow BA, J. Catal., 99, 104 (1986)
Siriwardane RV, Poston JA, Fisher EP, Shen MS, Miltz AL, Appl. Surf. Sci., 152, 219 (1999)
Sohn JR, J. Ind. Eng. Chem., 10(1), 1 (2004)
Sohn JR, Bae JH, Korean J. Chem. Eng., 17(1), 86 (2000)
Sohn JR, Cho SG, Pae YI, Hayashi S, J. Catal., 159(1), 170 (1996)
Sohn JR, Jang HJ, Kim HW, Korean J. Chem. Eng., 7(1), 7 (1990)
Sohn JR, Kim HW, Park MY, Park EH, Kim JT, Park SE, Appl. Catal. A: Gen., 128(1), 127 (1995)
Sohn JR, Kim JG, Kwon TD, Park EH, Langmuir, 18, 1667 (2002)
Sohn JR, Ozaki A, J. Catal., 61, 29 (1980)
Sohn JR, Park MY, Langmuir, 14(21), 6140 (1998)
Sohn JR, Park WC, Korean J. Chem. Eng., 17(6), 727 (2000)
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Vaudagna SR, Comelli RA, Canavese SA, Figoli NS, J. Catal., 169(1), 389 (1997)
Yamaguchi T, Appl. Catal., 61, 1 (1990)
