AROMATIZATION OF PROPANE OVER Zn/HZSM-5 CATALYSTS PREPARED BY CHEMICAL VAPOR DEPOSITION

Kwak BS; Sachtler WMH

Korean Journal of Chemical Engineering, Vol.13, No.4, 356-363, July, 1996

Zinc was introduced into HZSM-5 by chemical vapor deposition (CVD) to investigate the catalytic properties of Zn/HZSM-5 for propane conversion. Irrespective of catalytic precursor or ion exchange method, protons were found to be replaced by Zn ions. However, Zn species in the zeolite were different depending on the precursors used. Although the addition of Zn decreased the intensity of the Bronsted acidity, it did not caused the apparent formation of Lewis acid sites unlike Ga/HZSM-5 catalysts. On Zn/HZSM-5, both Zn and protons intervene in propane activation step.

Keywords:Aromatization;Propane;Zn/HZSM-5;CVD

[References]

Arroyo PA, Sousa-Aguiar EF, Monteiro JLF, ACS Prep. Div. Pet. Chem., 36(4), 685 (1991)
Augustine SM, Alameddin GN, Sachtler WMH, J. Catal., 115, 217 (1989)
Aylett BJ, "2. Zinc," Comprehensive Inorganic Chemistry, Bailar, B.J., Jr. et al., eds., Vol. 3, Pergamon Press, New York (1973)
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Kwak BS, Sachtler WM, Haag WO, J. Catal., 149(2), 465 (1994)
Kwak BS, Sachtler WMH, J. Catal., 141, 729 (1993)
Kwak BS, Sachtler WM, J. Catal., 145(2), 456 (1994)
LeVanMao R, Dufresne L, Yao J, Appl. Catal., 65, 143 (1990)
Meriaudeau P, Naccache C, J. Mol. Catal., 50, L7 (1989)
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Planck CJ, Rosinski EJ, Givens EN, U.S. Patent, 4,157,293 (1979)
Price GL, Kanazirev V, J. Catal., 126, 267 (1990)
Seddon D, Catal. Today, 6, 351 (1990)
Yang Y, Guo X, Deng M, Wang L, Fu Z, "The Characterization of Modified ZSM-5 Catalysts Prepared via a Solid State Reaction for Propane Aromatization," Zeolites as Catalysts, Sorbents and Detergent Builders, Karge, H.G. and Weitkamp, J., eds., Elsevier, Amsterdam (1989)
Yao J, LeVanMao R, Dufresne L, Appl. Catal., 65, 175 (1990)

[Referenced By]

[1] Arroyo PA, Sousa-Aguiar EF, Monteiro JLF, ACS Prep. Div. Pet. Chem., 36(4), 685 (1991)

[2] Augustine SM, Alameddin GN, Sachtler WMH, J. Catal., 115, 217 (1989)

[3] Aylett BJ, "2. Zinc," Comprehensive Inorganic Chemistry, Bailar, B.J., Jr. et al., eds., Vol. 3, Pergamon Press, New York (1973)

[4] Buckles G, Hutchings GJ, Williams CD, Catal. Lett., 11, 89 (1991)

[5] Bursian NR, Kogan SB, Daragan VK, Oranskaya OM, Podkletnova NM, ACS Prep. Div. Pet. Chem., 36(4), 738 (1991)

[6] Chu P, U.S. Patent, 4,120,910 (1978)

[7] Chu YF, Chester AW, U.S. Patent, 4,392,989 (1983)

[8] Csicsery SM, J. Catal., 17, 207 (1970)

[9] Famsworth M, Kline CH, "Zinc Chemicals, Their Properties and Applications," International Lead Zinc Research Organization, New York (1968)

[10] Gnep NS, Doyemet JY, Seco AM, Ribeiro FR, Guisnet M, Appl. Catal., 43, 155 (1988)

[11] Guisnet M, Gnep NS, Vasques H, Ribeiro FR, "ZnDoped HZSM5 Catalysts for Propane Aromatization," Zeolite Chemistry and Catalysis, Jacobs, P.A. et al., eds, ElSevier, Amsterdam (1991)

[12] Haag WO, Private Communication (1992)

[13] Haag WO, Dessau RM, "Duality of Mechanism for Acid-Catlayzed Paraffin Cracking," Proceedings, 8th International Congress on Catalysis, Berlin, 1984, Vol. 2, Dechema, Frankfurt am Main (1984)

[14] Inui T, Okazumi F, J. Catal., 90, 366 (1984)

[15] Kanai J, Kawata N, J. Catal., 114, 284 (1988)

[16] Kazansky VB, Kustov LM, Khodakov AY, "On the Nature of Active Sites for Dehydrogenation of Saturated Hydrocarbons in HZSM-5 Zeolites Modified by Zinc and Gallium Oxides," Zeolites: Facts, Figures, Future, Jacobs, P.A. and Van Santen, R.A., eds., Elsevier, Amsterdam (1989)

[17] Kwak BS, Sachtler WM, Haag WO, J. Catal., 149(2), 465 (1994)

[18] Kwak BS, Sachtler WMH, J. Catal., 141, 729 (1993)

[19] Kwak BS, Sachtler WM, J. Catal., 145(2), 456 (1994)

[20] LeVanMao R, Dufresne L, Yao J, Appl. Catal., 65, 143 (1990)

[21] Meriaudeau P, Naccache C, J. Mol. Catal., 50, L7 (1989)

[22] Mole T, Anderson JR, Creer G, Appl. Catal., 17, 141 (1985)

[23] Planck CJ, Rosinski EJ, Givens EN, U.S. Patent, 4,157,293 (1979)

[24] Price GL, Kanazirev V, J. Catal., 126, 267 (1990)

[25] Seddon D, Catal. Today, 6, 351 (1990)

[26] Yang Y, Guo X, Deng M, Wang L, Fu Z, "The Characterization of Modified ZSM-5 Catalysts Prepared via a Solid State Reaction for Propane Aromatization," Zeolites as Catalysts, Sorbents and Detergent Builders, Karge, H.G. and Weitkamp, J., eds., Elsevier, Amsterdam (1989)

[27] Yao J, LeVanMao R, Dufresne L, Appl. Catal., 65, 175 (1990)