Abstract
The acidic properties of the H-forms of zeolites ZSM-5, Beta, Y, and mordenite are studied by diffuse reflectance IR spectroscopy using n-pentane as a probe molecule. The decreasing order of Brønsted acid site strengths is constructed. The isopentane selectivity in n-pentane isomerization under supercritical conditions (260°C, 130 atm) increases in the order H-ZSM-5 < H-Beta < H-mordenite(11) ≈ H-Y with decreasing strength of Brønsted sites. Catalytic data are analyzed jointly with the results of physicochemical studies of H-mordenite (temperature-programmed ammonia desorption, benzene adsorption, and IR spectroscopy). Under the supercritical conditions, the conversion of n-pentane on mordenite is determined by the total acidity of the zeolite and also by the accessibility of the acid sites inside the zeolite channels to the reactant.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Lercher, J.A., Catal. Lett., 1994, vol. 27, p. 91.
Roldán, R., Romero, F.J., Jiménez-Sanchidrián, C., Marinas, J.M., and Gómez, J.P., Appl. Catal., A, 2005, vol. 288, nos. 1–2, p. 104.
Patrigeon, A., Benazzi, E., Travers, Ch., and Bernhard, J.Y., Catal. Today, 2001, vol. 65, nos. 2–4, p. 149.
Baiker, A., Chem. Rev., 1999, vol. 99, no. 2, p. 453.
Bogdan, V.I., Koklin, A.E., and Kazanskii, V.B., Kinet. Katal., 2007, vol. 48, no. 6, p. 841 [Kinet. Catal. (Engl. Transl.), vol. 48, no. 6, p. 785].
Bogdan, V.I., Koklin, A.E., and Kazanskii, V.B., Sverkhkrit. Flyuidy: Teor. Prakt., 2007, vol. 2, no. 4, p. 60.
Mishin, V.I., Plakhotnik, V.A., Unanova, O.G., and Baer, G.-K., Kinet. Katal., 1993, vol. 34, no. 2, p. 351.
Zhorov, Yu.M., Izomerizatsiya uglevodorodov: Khimiya i tekhnologiya (Hydrocarbon Isomerization: Chemistry and Technology), Moscow: Khimiya, 1983.
Subbotina, I.R., Shelimov, B.N., and Kazanskii, V.B., Kinet. Katal., 2002, vol. 43, no. 3, p. 445 [Kinet. Catal. (Engl. Transl.), vol. 43, no. 3, p. 412].
Kiricsi, I., Flego, C., Pazzuconi, G., Parker, W.O., Millini, R., Perego, C., and Bellussi, G., J. Phys. Chem., 1994, vol. 98, no. 17, p. 4627.
Zecchina, A. and Otero Arean, C., Chem. Soc. Rev., 1996, vol. 25, no. 3, p. 187.
Zholobenko, V., Makarova, M., and Dwyer, J., J. Phys. Chem., 1993, vol. 97, no. 22, p. 5962.
Meier, W.M. and Olson, D.H., Atlas of Zeolite Structure Types, London: Butterworth-Heinemann, 1992.
Breck, D.W., Zeolite Molecular Sieves: Structure, Chemistry, and Use, New York: Wiley, 1974.
Hair, M.L. and Hertl, W., J. Phys. Chem., 1970, vol. 74, no. 1, p. 91.
Bordiga, S., Turnes Palomino, G., Paze, C., and Zecchina, A., Microporous Mesoporous Mater., 2000, vol. 34, p. 67.
Kapustin, G.I., Brueva, T.R., and Klyachko, A.L., Appl. Catal., 1988, vol. 42, no. 2, p. 239.
Uvarova, E.B., Cand. Sci. (Chem.) Dissertation, Moscow: Inst. of Organic Chemistry, 1997.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.I. Bogdan, A.E. Koklin, V.B. Kazanskii, 2010, published in Kinetika i Kataliz, 2010, Vol. 51, No. 5, pp. 762–768.
Rights and permissions
About this article
Cite this article
Bogdan, V.I., Koklin, A.E. & Kazanskii, V.B. Catalytic activity of H-forms of zeolites in the isomerization of supercritical n-pentane and their physicochemical properties. Kinet Catal 51, 736–742 (2010). https://doi.org/10.1134/S0023158410050162
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0023158410050162