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Abstract <p>This study investigates, for the first time, how the preparation method of an Fe-containing dispersion effects its catalytic performance in the three-phase hydrogenation of a CO + CO<sub>2</sub> + H<sub>2</sub> mixture in a continuous stirred-tank reactor (CSTR). The results show that the preparation method influences nanoparticle size: drop thermolysis generates 2–4 nm nanoparticles, whereas flash pyrolysis produces larger particles with a size distribution peaking at 79 nm. Over the entire temperature range tested, the Fe-containing dispersion prepared by drop thermolysis exhibits higher activity (CO conversion up to 62.6%) than that synthesized by flash pyrolysis (49%). The Fe dispersion prepared by drop thermolysis exhibits selectivity toward C<sub>5+</sub> hydrocarbons, while that from flash pyrolysis favors methane. This difference arises from distinct active phases: Hägg carbide dominates in drop thermolysis whereas magnetite dominates in flash pyrolysis.</p>

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Effect of Iron-Containing Dispersion Preparation Method on the Performance of Three-Phase Hydrogenation of Carbon Oxides

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • Yanina V. Morozova,
  • Sergey A. Svidersky,
  • Anton V. Borisov,
  • Gleb D. Fominykh,
  • Mayya V. Kulikova

摘要

Abstract

This study investigates, for the first time, how the preparation method of an Fe-containing dispersion effects its catalytic performance in the three-phase hydrogenation of a CO + CO2 + H2 mixture in a continuous stirred-tank reactor (CSTR). The results show that the preparation method influences nanoparticle size: drop thermolysis generates 2–4 nm nanoparticles, whereas flash pyrolysis produces larger particles with a size distribution peaking at 79 nm. Over the entire temperature range tested, the Fe-containing dispersion prepared by drop thermolysis exhibits higher activity (CO conversion up to 62.6%) than that synthesized by flash pyrolysis (49%). The Fe dispersion prepared by drop thermolysis exhibits selectivity toward C5+ hydrocarbons, while that from flash pyrolysis favors methane. This difference arises from distinct active phases: Hägg carbide dominates in drop thermolysis whereas magnetite dominates in flash pyrolysis.