Abstract
The specifics of the deactivation of acid and Zn-containing MFI catalysts in the propane aromatization reaction at high-feed space velocities (600–2400 h−1) and temperatures (550–610°C) was studied. The kinetics of the buildup of carbonaceous products (coke) was investigated in situ during the catalytic reaction in a thermal analyzer coupled to a mass spectrometer and a gas chromatograph (TA-MS-GC). The nature of the coke was studied by means of differential thermal analysis (DTA) and elemental analysis. It was found that the buildup of heavy coke on the H-MFI zeolite takes place on the outer crystal surface and pore openings, thus leading to a decrease in the propane conversion at the beginning of the reaction. In contrast, light coke appears first and is transformed to heavy coke at later stages on Zn/H-MFI. The light coke leads to a decrease in the yield of methane, ethane, and ethylene, and the heavy coke impedes the formation of aromatic hydrocarbons.
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References
Kh. M. Minachev and A. A. Dergachev, Usp. Khim. 59, 1522 (1990).
T. Mole, J. R. Anderson, and G. Creer, Appl. Catal. 17, 141 (1985).
V. P. Sitnik, N. V. Nekrasov, T. V. Vasina, et al., Izv. Akad. Nauk SSSR, Ser. Khim., No. 4,727 (1990).
A. Hagen and F. Roessner, Catal. Rev. Sci. Eng., 42, 403 (2000).
J. A. Biscardi and E. Iglesia, Catal. Today, 31, 207 (1996).
Y. Ono, Catal. Rev. Sci. Eng., 34, 179 (1992).
C. A. Emeis, J. Catal., 141, 347 (1993).
Y. G. Kolyagin, V. V. Ordomsky, Y. Z. Khimyak, et al., J. Catal., 238, 122 (2006).
T. V. Vasina, V. P. Sitnik, V. P. Preobrazhenskii, et al., Izv. Akad. Nauk SSSR, Ser. Khim., No. 3, 528 (1989).
V. I. Yakerson, T. V. Vasina, L. I. Lafer, et al., Dokl. Akad. Nauk SSSR, 307 923 (1989).
V. I. Yakerson, T. V. Vasina, L. I. Lafer, et al., Izv. Akad. Nauk SSSR, Ser. Khim., No. 9, 1962 (1991).
P. Magnoux and M. Guisnet, Appl. Catal., 38, 341 (1988).
V. I. Yakerson, V. D. Nissenbaum, T. V. Vasina, et al., Izv. Akad. Nauk SSSR, Ser. Khim., No. 6, 1244 (1990).
A. P. Rudenko, I. I. Kulakova, and S. Ya. Kurganova, in Scientific Basics of Catalytic Conversion of Hydrocarbons (Naukova Dumka, Kiev, 1977) [in Russian].
C. L. Li, O. Novaro, E. MuOoz, et al., Appl. Catal. A: Gen., 199, 211 (2000).
M. A. Callejas, M. T. Martinez, T. Blasco, and E. Sastre, Appl. Catal. A: Gen., 218, 181 (2001).
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Original Russian Text © E.V. Asachenko, O.V. Rodina, V.V. Ordomskii, Yu.V. Gur’ev, I.I. Ivanova, 2008, published in Neftekhimiya, 2008, Vol. 48, No. 2, pp. 100–104.
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Asachenko, E.V., Rodina, O.V., Ordomskii, V.V. et al. Specifics of the deactivation of acid and zinc-containing propane aromatization catalysts. Pet. Chem. 48, 100–104 (2008). https://doi.org/10.1134/S0965544108020047
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DOI: https://doi.org/10.1134/S0965544108020047