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Abstract <p>This study investigates a silica-gel-supported cobalt catalyst for synthesizing long-chain hydrocarbons (C<sub>19+</sub>) from CO and H<sub>2</sub>. The process conditions were varied within the following ranges: pressure, 1.5–3.5 MPa; gas hourly space velocity (GHSV), 300–830 h<sup>–1</sup>; H<sub>2</sub>/CO ratio, 2.0–2.3; and temperature, 187–213°C. Catalytic testing revealed a correlation between the catalyst deactivation rate and the content of C<sub>19+</sub> hydrocarbons in the products. When the C<sub>19+</sub> content increased from approximately 40 to 55 wt %, the deactivation rate increased more than tenfold. Under optimized conditions (H<sub>2</sub>/CO = 2.3, <i>P</i> = 2.0 MPa, <i>T</i> = 193°C), the C<sub>19+</sub> content reached ~46–50 wt %, and the deactivation rate was minimized. A long-term stability test over 500 h was used to project a catalyst cycle length, which was found to be at least 4000 h. The study results provide a foundation for optimizing Fischer–Tropsch process conditions to maximize catalyst lifetime and selectivity toward heavy hydrocarbons, supporting the recommendation of the proposed catalyst for industrial implementation.</p>

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Silica-Gel-Supported Cobalt Catalysts for the Selective Synthesis of Long-Chain Hydrocarbons (C19+)

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • A. A. Chemes,
  • G. B. Narochnyi,
  • I. N. Zubkov,
  • D. A. Ponomarev,
  • M. A. Zubkova,
  • A. P. Savost’yanov,
  • R. E. Yakovenko

摘要

Abstract

This study investigates a silica-gel-supported cobalt catalyst for synthesizing long-chain hydrocarbons (C19+) from CO and H2. The process conditions were varied within the following ranges: pressure, 1.5–3.5 MPa; gas hourly space velocity (GHSV), 300–830 h–1; H2/CO ratio, 2.0–2.3; and temperature, 187–213°C. Catalytic testing revealed a correlation between the catalyst deactivation rate and the content of C19+ hydrocarbons in the products. When the C19+ content increased from approximately 40 to 55 wt %, the deactivation rate increased more than tenfold. Under optimized conditions (H2/CO = 2.3, P = 2.0 MPa, T = 193°C), the C19+ content reached ~46–50 wt %, and the deactivation rate was minimized. A long-term stability test over 500 h was used to project a catalyst cycle length, which was found to be at least 4000 h. The study results provide a foundation for optimizing Fischer–Tropsch process conditions to maximize catalyst lifetime and selectivity toward heavy hydrocarbons, supporting the recommendation of the proposed catalyst for industrial implementation.