CHARACTERIZATION OF ALUMINA MODIFIED WITH SULFATE AND PHOSPHATE

Kim SI; Woo SI

Korean Journal of Chemical Engineering, Vol.8, No.3, 177-182, July, 1991

The acidity and surface properties of alumina modified with sulfate(Al-S) and phosphate(Al-P) were characterized by IR, NH₃ TPD and 1-butene isomerization reaction. The Point of Zero Charge(PZC) of modified alumina and the amount of Mo anion adsorbed on modified alumina were measured. The PZC of modified alumina and the amount of Mo anion adsorbed on modified alumina decreased with increasing modifier content. Non-linear relationship between the PZC and Mo uptake in modified alumina was observed in Al-S and Al-P. The bonding mode of sulfate on alumina changed with increasing sulfate content. The Bronsted acid site appeared in alumina modified with sulfate of 10wt%

[References]

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Mensch CTJ, vanVeen JAR, vanWingerden B, vanDijk MP, J. Phys. Chem., 92, 4961 (1988)
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Gerberich HR, KeithHall W, J. Catal., 5, 99 (1966)

[Referenced By]

[1] vanVeen JAR, Hendriks PAJM, Romes EJGM, Andrea RR, J. Phys. Chem., 94, 5275 (1990)

[2] Mensch CTJ, vanVeen JAR, vanWingerden B, vanDijk MP, J. Phys. Chem., 92, 4961 (1988)

[3] Spanos N, Vordonis L, Kordulis C, Lycourghiotis A, J. Catal., 124, 301 (1990)

[4] Spanos N, Vordonis L, Kordulis C, Lycourghiotis A, J. Catal., 124, 315 (1990)

[5] Vordonis L, Koutsoukos PG, Lycourghiotis A, Langmuir, 2, 281 (1986)

[6] Vordonis L, Koutsoukos PG, Lycourghiotis A, J. Catal., 98, 296 (1986)

[7] Vordonis L, Koutsoukos PG, Lycourghiotis A, J. Catal., 101, 186 (1986)

[8] Mulcahy FM, Houalla M, Hercules DM, J. Catal., 106, 210 (1987)

[9] Mulcahy FM, Houalla M, Hercules DM, "Proc. of the 9th International Congress on Catalysis," Calgary, Canada, p. 1968 (1988)

[10] Mieth JA, Schwarz JA, Huang YJ, Fung SC, J. Catal., 122, 202 (1990)

[11] Saur O, Bensitel M, Mohammed SAB, Lavalley JC, Tripp CP, Morrow BA, J. Catal., 99, 104 (1986)

[12] Jin T, Yamaguchi T, Tanabe K, J. Phys. Chem., 90, 4794 (1986)

[13] Yamaguchi T, Jin T, Tanabe K, J. Phys. Chem., 90, 3148 (1986)

[14] Kiviat FE, Petrakis L, J. Phys. Chem., 77, 1232 (1973)

[15] Przystajko W, Fiedorow R, DallaLana IG, Appl. Catal., 15, 265 (1985)

[16] Kayo A, Yamaguchi T, Tanabe K, J. Catal., 83, 99 (1983)

[17] Okamoto Y, Imanaka T, J. Catal., 83, 99 (1983)

[18] Brunelle JP, Pure Appl. Chem., 50, 1211 (1978)

[19] Morales A, RamirezdeAgudelo MM, Hernandez F, Appl. Catal., 41, 261 (1988)

[20] Fitz CW, Rase HF, Ind. Eng. Chem. Prod. Res. Dev., 22, 40 (1983)

[21] Medema J, J. Catal., 37, 91 (1975)

[22] Gerberich HR, KeithHall W, J. Catal., 5, 99 (1966)