Abstract
The results of a study on the deactivation of an industrial Co–Al2O3/SiO2 catalyst under the conditions of highly productive Fischer–Tropsch synthesis of long-chained hydrocarbons at high pressure (6 MPa) are presented. It was found that an increase in the synthesis temperature led to a decrease in the rate of catalyst deactivation. The effect of the thermal agglomeration of cobalt particles and the carbonization of catalyst surface on the activity of the catalyst under the test conditions was insignificant. A correlation between the rate of catalyst deactivation and the selectivity for С19+ hydrocarbons was found; this correlation indicated the blocking of chain growth centers by synthesized waxes as the main reason for the rapid loss of catalyst activity.
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Funding
This study was supported by the Russian Foundation for Basic Research (project no. 20-33-90155), funded by the Ministry of Education and Science of the Russian Federation (state contract no. 2019-0990), and carried out with the use of the equipment of the Nanotechnology Center for Collective Use at the Platov South-Russian State Polytechnic University (NPI).
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Translated by V. Makhlyarchuk
Abbreviations and notation: FTS, Fischer–Tropsch synthesis; TEM, transmission electron microscopy; XRD, X-ray diffraction; GHSV, gas hourly space velocity; DSC, differential scanning calorimetry; DTA, differential thermal analysis.
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Soromotin, V.N., Yakovenko, R.E., Medvedev, A.V. et al. Reasons for the Rapid Deactivation of a Cobalt Catalyst in the High-Efficiency Fischer–Tropsch Synthesis of C19+ Hydrocarbons. Kinet Catal 62, 845–852 (2021). https://doi.org/10.1134/S002315842106015X
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DOI: https://doi.org/10.1134/S002315842106015X