THE EFFECTS OF CATALYST MODIFICATION ON THE CATALYTIC ACTIVITY IN THE DEHYDROCYCLIZATION OF PARAFFINS OVER Pt/r-Al2O3

Lee SH; Lee HI

Korean Journal of Chemical Engineering, Vol.11, No.3, 185-189, July, 1994

THE EFFECTS OF CATALYST MODIFICATION ON THE CATALYTIC ACTIVITY IN THE DEHYDROCYCLIZATION OF PARAFFINS OVER Pt/r-Al₂O₃

In the dehydrocyclization of n-octane over Pt-Sn/r-Al₂O₃, the bimetallic Pt-Sn catalyst prepared by simultaneous impregnation as a complex showed higher activity than the catalyst prepared by successive impregnation with SnCl₂ and H₂PtCl₆, and the suspended Pt-Sn catalyst showed more enhanced catalytic behaviors in C₈-aromatics formation than the normal one. The geometric factor was an important parameter for the positive effect on the catalytic activity in the n-octane conversion, while the electronic factor, the electron density of the metal, was that in the aromatization of n-hexane.

[References]

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Dautzenberg FM, Platteeum JC, J. Catal., 19, 41 (1970)
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Lietz G, Thoang HS, Volter J, React. Kinet. Catal. Lett., 21, 429 (1982)
Campero A, Ruiz M, Gomez R, React. Kinet. Catal. Lett., 5, 177 (1976)
Davix BH, Venuto PB, J. Catal., 15, 363 (1969)

[1] Haensel V, Donaldson GR, Ind. Eng. Chem., 43, 2102 (1951)

[2] Bacaud R, Bussiere P, J. Catal., 69, 399 (1981)

[3] Lieske H, Volter J, J. Catal., 90, 96 (1984)

[4] Kuznetsov VI, Belyi AS, Yurchenko EN, Smolikov MD, Protasova MT, Zatolokina EV, Duplyakin VK, J. Catal., 99, 159 (1986)

[5] Sachtler WMH, Jongepier R, J. Catal., 1, 665 (1965)

[6] Christmann K, Ertl G, Surf. Sci., 33, 254 (1972)

[7] Sinfelt JH, Carter JL, Yates DJC, J. Catal., 24, 283 (1972)

[8] Maestas S, Flanagan JB, J. Phys. Chem., 77, 850 (1973)

[9] Fisher TE, Phys. Today, 5, 23 (1974)

[10] Sinfelt JH, "Catalysis," Vol. 1, Ed., Anderson, J.R. and Boudart, M., Ch. 5, Spring-Verlag, Berlin (1981)

[11] Davis BH, Westfall GA, Watkins J, Pezzanite JJJ, J. Catal., 42, 247 (1976)

[12] burch R, Garla LC, J. Catal., 71, 360 (1981)

[13] Lee SH, Lee HI, J. Korean Ind. Eng. Chem., 4(3), 569 (1993)

[14] Shepard FE, Rooney JJ, J. Catal., 33, 129 (1964)

[15] Snatacesarla E, Gelosa D, Ind. Eng. Chem. Prod. Res. Dev., 17, 68 (1978)

[16] Dautzenberg FM, Helle JN, Biloen P, Sachtler WMH, J. Catal., 63, 119 (1980)

[17] Clarke JKA, Chem. Rev., 75, 391 (1975)

[18] Verbeek H, Sachtler WMH, J. Catal., 42, 257 (1976)

[19] Dautzenberg FM, Platteeum JC, J. Catal., 19, 41 (1970)

[20] Volter J, Lietz G, Hermann M, J. Catal., 68, 42 (1981)

[21] Lietz G, Thoang HS, Volter J, React. Kinet. Catal. Lett., 21, 429 (1982)

[22] Campero A, Ruiz M, Gomez R, React. Kinet. Catal. Lett., 5, 177 (1976)

[23] Davix BH, Venuto PB, J. Catal., 15, 363 (1969)