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<p>Propylene epoxidation with hydrogen and oxygen to prepare propylene oxide (PO) offers advantages in cleanliness, efficiency and flexibility. The Au/TS-1 catalyst exhibits great catalytic activity for the gas-phase epoxidation of propylene, which is attributed to the synergistic effect between Au nanoparticles and TS-1 zeolites: Au catalyzes the in situ generation of HOOH, and framework Ti atoms catalyze the oxygen addition to the double bond of propylene. Despite these benefits, the catalytic performance of Au-Ti catalysts remains insufficient for industrial applications, primarily due to their limited activity, excessive byproduct formation, and catalyst deactivation. Current strategies focus on enhancing active site exposure, optimizing pore structure and Au dispersion, suppressing side reactions, and improving diffusion kinetics. This review systematically evaluates advancements in catalyst design, proposes research directions for designing regeneration strategies and mitigating safety risks, offering actionable insights to accelerate the development of industrially viable catalytic systems for PO synthesis.</p><p></p>

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Reaction limitations and modification strategies of Au-Ti catalysts for gas-phase propylene epoxidation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月7日

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  • Yujia Liu,
  • Yupeng Tian,
  • Yahui Li,
  • Hongwei Zhu,
  • Mingzhi Li,
  • Chenyang Zhao,
  • Bing Sun,
  • Wei Xu,
  • Zhe Yang

摘要

Propylene epoxidation with hydrogen and oxygen to prepare propylene oxide (PO) offers advantages in cleanliness, efficiency and flexibility. The Au/TS-1 catalyst exhibits great catalytic activity for the gas-phase epoxidation of propylene, which is attributed to the synergistic effect between Au nanoparticles and TS-1 zeolites: Au catalyzes the in situ generation of HOOH, and framework Ti atoms catalyze the oxygen addition to the double bond of propylene. Despite these benefits, the catalytic performance of Au-Ti catalysts remains insufficient for industrial applications, primarily due to their limited activity, excessive byproduct formation, and catalyst deactivation. Current strategies focus on enhancing active site exposure, optimizing pore structure and Au dispersion, suppressing side reactions, and improving diffusion kinetics. This review systematically evaluates advancements in catalyst design, proposes research directions for designing regeneration strategies and mitigating safety risks, offering actionable insights to accelerate the development of industrially viable catalytic systems for PO synthesis.