Effect of Gas Circulation on the Synthesis of C35+ Long-Chain Hydrocarbons from CO and H2 at a High Pressure

Abstract

The effect of gas recirculation on the preparation of C35+ long-chain hydrocarbons on a supported Co-Al2O3/SiO2 catalyst at 6.0 MPa, 225°C, and the gas hourly space velocity of 1000 h–1 is studied. It is shown that the circulation regime allows the catalyst bed to be isothermal and improves the selectivity and productivity of C35+ hydrocarbons. It is found that the rate of catalyst deactivation slows by a factor of eight when the circulation ratio is raised from 2.2 to 6, while the amount of unsaturated hydrocarbons in the products of synthesis doubles.

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Funding

This work was supported by the RF Ministry of Education and Science as part of State Task no. 10.2980.2017/4.6; and by RF Presidential Grant for Young Scientists no. MK-364.2019.3.

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Correspondence to R. E. Yakovenko or I. N. Zubkov or G. B. Narochnyi or A. P. Savost’yanov.

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Translated by A. Tulyabaev

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Yakovenko, R.E., Zubkov, I.N., Narochnyi, G.B. et al. Effect of Gas Circulation on the Synthesis of C35+ Long-Chain Hydrocarbons from CO and H2 at a High Pressure. Catal. Ind. 12, 95–100 (2020). https://doi.org/10.1134/S2070050420020105

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Keywords:

  • Fischer–Tropsch synthesis
  • high pressure
  • gas circulation
  • C35+ long-chain hydrocarbons