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Abstract <p>This study investigates the synthesis and performance of iron–polymer composite catalysts for the conversion of syngas to higher alcohols. A promoted Fe–polyvinyl alcohol (PVA) composite catalyst, with a formulation denoted as 20Fe/2Al–2Mn–2K–2V/PVA, was synthesized <i>via</i> the organic matrix method. Its physicochemical properties and catalytic performance were evaluated. X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy revealed that heat treatment facilitated the formation of active phases (Fe<sub>3</sub>O<sub>4</sub>, χ-Fe<sub>5</sub>C<sub>2</sub>, and Fe<sub>7</sub>C<sub>3</sub>), which were stabilized within a carbon matrix featuring a polyconjugated bond network. The resulting composite exhibited high catalytic activity in CO hydrogenation following hydrogen pre-reduction. The reduced catalyst achieved 82% CO conversion at 320°C, and the content of higher alcohols in the hydrocarbon phase reached 27 wt % with a marked predominance of heavy alcohols (C<sub>8+</sub>/C<sub>4</sub>–C<sub>7</sub> ratio ≈ 2.1).</p>

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Promoted Fe-Based Composite Catalysts for Higher Alcohol Synthesis from Syngas

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • I. V. Bliznetsov,
  • M. I. Ivantsov,
  • M. V. Kulikova

摘要

Abstract

This study investigates the synthesis and performance of iron–polymer composite catalysts for the conversion of syngas to higher alcohols. A promoted Fe–polyvinyl alcohol (PVA) composite catalyst, with a formulation denoted as 20Fe/2Al–2Mn–2K–2V/PVA, was synthesized via the organic matrix method. Its physicochemical properties and catalytic performance were evaluated. X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy revealed that heat treatment facilitated the formation of active phases (Fe3O4, χ-Fe5C2, and Fe7C3), which were stabilized within a carbon matrix featuring a polyconjugated bond network. The resulting composite exhibited high catalytic activity in CO hydrogenation following hydrogen pre-reduction. The reduced catalyst achieved 82% CO conversion at 320°C, and the content of higher alcohols in the hydrocarbon phase reached 27 wt % with a marked predominance of heavy alcohols (C8+/C4–C7 ratio ≈ 2.1).