Characterization of Cobalt Sulfate Supported on Zirconia and Activity for Acid Catalysis

Jong Rack Sohn; Eun Hee Park; Hae Won Kim

Journal of Industrial and Engineering Chemistry, Vol.5, No.4, 253-260, December, 1999

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Characterization of Cobalt Sulfate Supported on Zirconia and Activity for Acid Catalysis

Jong Rack Sohn^†, Eun Hee Park, and Hae Won Kim¹

Department of Industrial Chemistry, Engineering College, Kyungpook National University, Taegu 702-701, Korea
¹Department of Industrial Chemistry, Kyungil University, Kyungsan 712-701, Korea

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Cobalt sulfate supported on zirconia catalysts were prepared by drying powdered Zr(OH)₄ with a cobalt sulfate aqueous solution followed by calcining in air at a high temperature. The characterization of the prepared catalysts was performed using Fourier transform infrared (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and by the measurement of the surface area. The addition of cobalt sulfate to zirconia shifted the phase transition of ZrO₂ from amorphous to tetragonal to higher temperature due to the interaction between the cobalt sulfate and the zirconia, and the specific surface area and acidity of catalysts increased in proportion to the cobalt sulfate content up to 6 wt % of CoSO₄. Infrared spectra of the ammonia adsorbed on the CoSO₄/ZrO₂ showed the presence of Bronsted and Lewis acid sites on the surface of the CoSO₄/ZrO₂. CoSO₄/ZrO₂ calcined at 600∼650 ℃ exhibited the maximum catalytic activities for 2-propanol dehydration and cumene dealkylation. The catalytic activities for cumene dealkylation were roughly correlated with the acidity of the catalysts measured by the ammonia chemisorption method.

Keywords:cobalt sulfate;characterization;acid catalysis;2-propanol dehydration;cumene dealdylation;thermal analysis

[References]

Cheung TK, Ditri JL, Lange FC, Gates BC, Catal. Lett., 31(2-3), 153 (1995)
Tanabe K, Misono M, Ono Y, Hattori H, "New Solid Acids and Bases," Elsevier Science, Amsterdam (1989)
Arata K, Adv. Catal., 37, 165 (1990)
Ward DA, Ko EI, J. Catal., 150(1), 18 (1994)
Kustov LM, Kazansky VB, Figueras F, Tichit D, J. Catal., 150(1), 143 (1994)
Hsu CY, Heimbuch CR, Armes CT, Gates BC, J. Chem. Soc.-Chem. Commun., 1645 (1992)
Hosoi T, Shimadzu T, Ito S, Baba S, Takaoka H, Imai T, Yokoyama N, Prepr. Symp. Div. Petr. Chem. American Chemical Society, Los Angeles, 562 (1988)
Ebitani K, Konishi J, Hattori H, J. Catal., 130, 257 (1991)
Hino M, Arata K, J. Chem. Soc.-Chem. Commun., 1259 (1987)
Larsen G, Lotero E, Parra RD, Proc. 11th Int. Congr. Catal., 533 (1996)
Sohn JR, Park EH, J. Ind. Eng. Chem., 4(3), 197 (1998)
Sohn JR, Cho SG, Pae YI, Hayashi S, J. Catal., 159(1), 170 (1996)
Sohn JR, Park MY, J. Ind. Eng. Chem., 4(2), 84 (1998)
Sohn JR, Kim HW, Park MY, Park EH, Kim JT, Park SE, Appl. Catal. A: Gen., 128(1), 127 (1995)
Saur O, Bensitel M, Saad ABH, Lavalley JC, Tripp CP, Morrow BA, J. Catal., 99, 104 (1986)
Morrow BA, McFarlane RA, Lion M, Lavalley JC, J. Catal., 107, 232 (1987)
Larsen G, Lotero E, Petkovic LM, Shobe DS, J. Catal., 169(1), 67 (1997)
Afanasiev P, Geantet C, Breysse M, Coudurier G, Vedrine JC, J. Chem. Soc.-Faraday Trans., 90, 193 (1994)
Sohn JR, Ryu SG, Langmuir, 9, 126 (1993)
Sohn JR, Lee SY, Appl. Catal. A: Gen., 164(1-2), 127 (1997)
Olah FGA, Prakash GKS, Sommer J, Science, 206, 13 (1979)
Basila MR, Kantner TR, J. Phys. Chem., 71, 467 (1967)
Satsuma A, Hattori A, Mizutani K, Furuta A, Miyamoto A, Hattori T, Murakami Y, J. Phys. Chem., 92, 6052 (1988)
Yamaguchi T, Appl. Catal., 61, 1 (1990)
Sohn JR, Jang HJ, J. Mol. Catal., 64, 349 (1991)
Decanio SJ, Sohn JR, Paul PO, Lunsford JH, J. Catal., 101, 132 (1986)

[Referenced By]

[1] Cheung TK, Ditri JL, Lange FC, Gates BC, Catal. Lett., 31(2-3), 153 (1995)

[2] Tanabe K, Misono M, Ono Y, Hattori H, "New Solid Acids and Bases," Elsevier Science, Amsterdam (1989)

[3] Arata K, Adv. Catal., 37, 165 (1990)

[4] Ward DA, Ko EI, J. Catal., 150(1), 18 (1994)

[5] Kustov LM, Kazansky VB, Figueras F, Tichit D, J. Catal., 150(1), 143 (1994)

[6] Hsu CY, Heimbuch CR, Armes CT, Gates BC, J. Chem. Soc.-Chem. Commun., 1645 (1992)

[7] Hosoi T, Shimadzu T, Ito S, Baba S, Takaoka H, Imai T, Yokoyama N, Prepr. Symp. Div. Petr. Chem. American Chemical Society, Los Angeles, 562 (1988)

[8] Ebitani K, Konishi J, Hattori H, J. Catal., 130, 257 (1991)

[9] Hino M, Arata K, J. Chem. Soc.-Chem. Commun., 1259 (1987)

[10] Larsen G, Lotero E, Parra RD, Proc. 11th Int. Congr. Catal., 533 (1996)

[11] Sohn JR, Park EH, J. Ind. Eng. Chem., 4(3), 197 (1998)

[12] Sohn JR, Cho SG, Pae YI, Hayashi S, J. Catal., 159(1), 170 (1996)

[13] Sohn JR, Park MY, J. Ind. Eng. Chem., 4(2), 84 (1998)

[14] Sohn JR, Kim HW, Park MY, Park EH, Kim JT, Park SE, Appl. Catal. A: Gen., 128(1), 127 (1995)

[15] Saur O, Bensitel M, Saad ABH, Lavalley JC, Tripp CP, Morrow BA, J. Catal., 99, 104 (1986)

[16] Morrow BA, McFarlane RA, Lion M, Lavalley JC, J. Catal., 107, 232 (1987)

[17] Larsen G, Lotero E, Petkovic LM, Shobe DS, J. Catal., 169(1), 67 (1997)

[18] Afanasiev P, Geantet C, Breysse M, Coudurier G, Vedrine JC, J. Chem. Soc.-Faraday Trans., 90, 193 (1994)

[19] Sohn JR, Ryu SG, Langmuir, 9, 126 (1993)

[20] Sohn JR, Lee SY, Appl. Catal. A: Gen., 164(1-2), 127 (1997)

[21] Olah FGA, Prakash GKS, Sommer J, Science, 206, 13 (1979)

[22] Basila MR, Kantner TR, J. Phys. Chem., 71, 467 (1967)

[23] Satsuma A, Hattori A, Mizutani K, Furuta A, Miyamoto A, Hattori T, Murakami Y, J. Phys. Chem., 92, 6052 (1988)

[24] Yamaguchi T, Appl. Catal., 61, 1 (1990)

[25] Sohn JR, Jang HJ, J. Mol. Catal., 64, 349 (1991)

[26] Decanio SJ, Sohn JR, Paul PO, Lunsford JH, J. Catal., 101, 132 (1986)