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Catalytic Cracking of Cyclohexane and 1-Hexene Mixtures on Mono-, Bi-, and Tri-Zeolite Catalysts

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Abstract

The effects of temperature (540–640°C), weight hour space velocity (1.0–7.0 h–1), and steam : raw material ratios (0–2.5) on the yield of C2–C4 olefins, conversion, and octane characteristics in the cracking of a mixture of model hydrocarbons (cyclohexane and 1-hexene) were studied. The influence of the structure of zeolites in mono-, bi-, and tri-zeolite catalysts on the distribution of cracking products was examined. It was found that the combination of catalyst components in bi- and tri-zeolite systems makes it possible to increase the efficiency of the consecutive cracking of hydrocarbons (C6–C12 → C4–C8 → C3–C6 → C2–C4) according to the following reaction scheme: matrix → ZSM-5 → FER. The maximum total yield of C2–C4 olefins (50.2 wt % at a conversion of 75.5%) was achieved with the use of a bi-zeolite catalyst of ZSM-5 + FER.

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ACKNOWLEDGMENTS

This work was performed at the Institute of Hydrocarbons Processing, Siberian Branch, Russian Academy of Sciences in accordance with a research program V.46 for 2013–2020 (project no. V.46.2.4; state registration no. AAAA-A17-117021450095-1).

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Correspondence to O. V. Potapenko.

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Translated by V. Makhlyarchuk

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Potapenko, O.V., Khudyakov, M.S., Altynkovich, E.O. et al. Catalytic Cracking of Cyclohexane and 1-Hexene Mixtures on Mono-, Bi-, and Tri-Zeolite Catalysts. Kinet Catal 60, 74–86 (2019). https://doi.org/10.1134/S0023158419010117

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