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Abstract <p>The study investigates the effects of byproduct water from ethanol self-condensation on the performance of a 2%Cu/γ-Al<sub>2</sub>O<sub>3</sub> catalyst. It was found that water accumulation in the reaction mixture inhibits the self-condensation of ethanol into linear primary alcohols (1-butanol, 1-hexanol, and 1-octanol). XRD and NH<sub>3</sub>-TPD characterization revealed that 12 h of operation reduced the overall catalyst acidity and caused partial phase transition from γ-Al<sub>2</sub>O<sub>3</sub> to boehmite, both effects likely caused by contact with water produced during the reaction. SEM and IR spectroscopy demonstrated structural changes in the catalyst surface. The yield of linear primary alcohols increased through the use of dehydrated ethanol or the addition of potassium carbonate to bind the water produced.</p>

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The Effects of Water on Self-Condensation of Ethanol over Copper-Based Catalysts

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • R. A. Bagdatov,
  • G. I. Konstantinov,
  • I. S. Levin,
  • O. V. Arapova,
  • A. V. Chistyakov

摘要

Abstract

The study investigates the effects of byproduct water from ethanol self-condensation on the performance of a 2%Cu/γ-Al2O3 catalyst. It was found that water accumulation in the reaction mixture inhibits the self-condensation of ethanol into linear primary alcohols (1-butanol, 1-hexanol, and 1-octanol). XRD and NH3-TPD characterization revealed that 12 h of operation reduced the overall catalyst acidity and caused partial phase transition from γ-Al2O3 to boehmite, both effects likely caused by contact with water produced during the reaction. SEM and IR spectroscopy demonstrated structural changes in the catalyst surface. The yield of linear primary alcohols increased through the use of dehydrated ethanol or the addition of potassium carbonate to bind the water produced.