Distribution Features of Products of Long-Chain Alkane Hydrogenolysis over Unpromoted Cobalt Catalysts
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The experimental data on the hydrogenolysis of long-chain alkanes over suspended cobalt Fischer–Tropsch catalysts are presented which demonstrate the specific character of the molecular-mass distribution of its products (the combination of excess methane, local minimum at С3–С7 carbon chain lengths, and local maximum at С12–С16 carbon chain lengths). These results provide the experimental verification for the model of the mentioned distribution previously advanced by the authors which includes the hypothesis that the probability of С–С bond cleavage in an alkane molecule increases from the chain center to its ends. These distribution features are observed in the conversion of both alkanes of the suspension medium and individual n-alkanes (n-С16Н34) at different temperatures for in situ synthesized nanosized catalysts and commercial oxide samples and for n-С16Н34 after distillation of the hydrocarbon medium of the preliminarily suspended nanosized catalyst.
Keywords:cobalt catalysts hydrogenolysis of alkanes molecular-mass distribution
This study, conducted at the Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, was supported by the Russian Science Foundation (project no. 17-73-30046).
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