Abstract
The study investigates the hydrodecyclization of decalin over zeolite catalysts. The synthesized catalysts were characterized using a combination of physicochemical methods, such as TEM, SEM, low-temperature nitrogen adsorption/desorption, and XPS. The zeolite structure was found to have a major effect on the hydrodecyclization process. This process involves the isomerization of one ring followed by the opening of that ring. Incorporating iridium into the catalysts promoted the production of branched hydrocarbons. When testing the process in the temperature range of 300–400°C and at an initial hydrogen pressure of 50 atm, the Ir/BEA catalyst exhibited the highest activity: at 350°C the decyclization of decalin exceeded 50%.
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ACKNOWLEDGMENTS
This work was performed using equipment of the Shared Research Center “Analytical center of deep oil processing and petrochemistry” of TIPS RAS. The authors thank the Joint Research Center for Physical Methods of Research at the Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences (JRC PMR IGIC RAS) for their cooperation in the investigation of catalyst properties.
Funding
This study was funded by the Russian Science Foundation (project no. 22-79-10294).
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A.L. Maximov, a co-author, is the editor-in-chief at the Neftekhimiya (Petroleum Chemistry) Journal. The other co-authors declare no conflict of interest requiring disclosure in this article.
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Mamian, L.G., Sadovnikov, A.A., Arapova, O.V. et al. Hydrodecyclization of Naphthenes over Iridium-Containing Zeolite Catalysts. Pet. Chem. 63, 1080–1086 (2023). https://doi.org/10.1134/S0965544123080054
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DOI: https://doi.org/10.1134/S0965544123080054