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Selective hydrotreating of cat-cracked gasoline over a K–CoMoS/Al2O3 catalyst

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Abstract

The catalytic properties of CoMoS/Al2O3 and K–CoMoS/Al2O3 laboratory catalysts versus those of the commercial catalyst NK-100 (CoMo/Al2O3) have been investigated in the hydrotreating of the heavy fraction of cat-cracked gasoline (CCG). The basic kinetic parameters of the hydrodesulfurization and olefin hydrogenation processes have been experimentally determined. The addition of 7.5 wt % potassium to the CoMoS/Al2O3 catalyst decreases both the apparent activation energy and preexponential factor of both processes and increases the selectivity coefficient by a factor of over 3. Selective hydrotreating of the heavy fraction of CCG has been carried out over a K–CoMoS/Al2O3 sample at a temperature of 280°C, a pressure of 1.5MPa, a feed hourly space velocity of 7.5 h–1, and H2: feed = 100 NL/L. As a result, the sulfur content of gasoline has been reduced from 92 to 13 mg/kg without affecting the octane number. If the proportion of CCG in commercial gasoline obtained by compounding CCG with other components is 20–35%, the sulfur content of the product will meet the environmental requirements imposed on Class 5 fuels according to regulations.

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Authors and Affiliations

  1. Samara State Technical University, Samara, 443100, Russia

    D. I. Ishutenko, P. A. Nikul’shin, V. V. Konovalov & A. A. Pimerzin

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  1. D. I. Ishutenko
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  2. P. A. Nikul’shin
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  3. V. V. Konovalov
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  4. A. A. Pimerzin
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Correspondence to D. I. Ishutenko.

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Original Russian Text © D.I. Ishutenko, P.A. Nikul’shin, V.V. Konovalov, A.A. Pimerzin, 2015, published in Kinetika i Kataliz, 2015, Vol. 56, No. 6, pp. 735–745.

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Ishutenko, D.I., Nikul’shin, P.A., Konovalov, V.V. et al. Selective hydrotreating of cat-cracked gasoline over a K–CoMoS/Al2O3 catalyst. Kinet Catal 56, 747–757 (2015). https://doi.org/10.1134/S0023158415060038

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