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<p>Catalytic conversion of biomass‑derived diketene into aromatics represents a novel and economical pathway for aromatics production. Aromatic selectivity of 50.4% is achieved at 21.0% diketene conversion over Beta zeolite, with benzene, toluene, and xylenes (BTX) constitute 99.2% of the total aromatic products. The aromatic selectivity over Beta zeolite (Si/Al = 14) is higher than that over MCM-22(35.6%) and ZSM-11(38.5%) zeolites. Beta (14) zeolite possesses a larger micropore surface area and micropore volume than MCM-22 and ZSM-11, which favor the formation of aromatics. A decrease in the Si/Al ratio of Beta zeolites leads to an increase in the density of weak acid sites, which in turn enhances the selectivity toward aromatics and BTX. The conversion of diketene to aromatics likely involves acetyl group and ketene intermediate, which may be converted into hydrocarbons. Light olefins (C<sub>2</sub>-C<sub>4</sub> olefins) are the primary hydrocarbon products, which may be transformed into aromatics and alkanes via hydrogen transfer. This study provides a novel reaction pathway for the production of aromatics from diketene over zeolites.</p> Graphical Abstract <p></p>

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Catalytic Conversion of Diketene to Aromatics on the Beta Zeolite

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Tianle Yang,
  • Yang Zhang,
  • Xiaodi Lei,
  • Lixia Ling,
  • Riguang Zhang,
  • Baojun Wang

摘要

Catalytic conversion of biomass‑derived diketene into aromatics represents a novel and economical pathway for aromatics production. Aromatic selectivity of 50.4% is achieved at 21.0% diketene conversion over Beta zeolite, with benzene, toluene, and xylenes (BTX) constitute 99.2% of the total aromatic products. The aromatic selectivity over Beta zeolite (Si/Al = 14) is higher than that over MCM-22(35.6%) and ZSM-11(38.5%) zeolites. Beta (14) zeolite possesses a larger micropore surface area and micropore volume than MCM-22 and ZSM-11, which favor the formation of aromatics. A decrease in the Si/Al ratio of Beta zeolites leads to an increase in the density of weak acid sites, which in turn enhances the selectivity toward aromatics and BTX. The conversion of diketene to aromatics likely involves acetyl group and ketene intermediate, which may be converted into hydrocarbons. Light olefins (C2-C4 olefins) are the primary hydrocarbon products, which may be transformed into aromatics and alkanes via hydrogen transfer. This study provides a novel reaction pathway for the production of aromatics from diketene over zeolites.

Graphical Abstract