Catalytic degradation of ethylene oxide over Ag/α-Al2O3

Jacob H. Miller, Aniket Joshi, Xinyu Li, Aditya Bhan

Research output: Contribution to journalArticlepeer-review

Abstract

Ethylene oxide (EO) degradation over Ag/α-Al2O3 catalysts involves bifunctional pathways, whereby α-Al2O3 surfaces catalyze hydration, isomerization, dimerization, and oxidation while Ag surfaces facilitate combustion and isomerization of ethylene oxide. EO degradation reactions run over Ag/α-Al2O3, α-Al2O3, and intrapellet mixtures thereof with co-feeds of O2 and oxygenate products show that Ag surfaces are more reactive than α-Al2O3 and that oxygenate products generated over α-Al2O3 combust over Ag much more (>30x) readily than EO. These observations suggest that additives which mitigate surface hydration of α-Al2O3 and combustion activity of Ag will most effectively mitigate EO degradation.

Original languageEnglish (US)
Pages (from-to)714-720
Number of pages7
JournalJournal of Catalysis
Volume389
DOIs
StatePublished - Sep 2020

Keywords

  • Ag
  • Epoxidation
  • Ethylene oxide
  • Reaction pathways
  • α-AlO

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