Abstract
It has been shown that Fe-Co nanocatalysts in situ synthesized in a hydrocarbon medium with a Fe/Co weight ratio of 2–6 can mediate the Fischer-Tropsch synthesis in a three-phase system at a pressure of 20 atm, a temperature of 250–300°C, and a CO/H2 ratio of 1: 1. The introduction of CO leads to a significant increase in the total activity of the catalyst system (K CO reaches 85% at 300°C). However, gas evolution is enhanced and the highest yield of liquid products is as low as 74 g/m3 in this case. The introduction of K and Al into the Fe-Co catalysts and the optimization of the Fe/Co ratio make it possible to increase the yield of liquid products to 143 g/m3 (Fe/Co = 2.4) and achieve an efficiency of 337 g/(kg Me h). The Fe-Co nanocatalysts exhibit a high polymerizing activity (Schulz-Flory alpha is higher than 0.8). Hydrocarbons obtained over Fe-Co-K-Al catalysts contain more than 20% olefins. Their amount increases with the increasing Fe concentration in the sample. Oxygenates formed over these catalysts are composed of alcohols by over 90%, of which ethanol prevails (65–70%).
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Original Russian Text © S.N. Khadzhiev, S.A. Sagitov, A.S. Lyadov, M.V. Kulikova, A.Yu. Krylova, 2014, published in Neftekhimiya, 2014, Vol. 54, No. 2, pp. 85–94.
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Khadzhiev, S.N., Sagitov, S.A., Lyadov, A.S. et al. Fischer-Tropsch process in a three-phase system over iron-cobalt catalyst nanoparticles in situ synthesized in a hydrocarbon medium. Pet. Chem. 54, 88–93 (2014). https://doi.org/10.1134/S096554411401006X
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DOI: https://doi.org/10.1134/S096554411401006X