YBa2Cu3O7-δXσ (X=F and CI): Highly Active and Durable Catalysts for the Selective Oxidation of Ethane to Ethene

H. X. Dai*, C. F. Ng, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The catalytic performance and characterization of YBa2Cu3O7-δ and YBa2Cu3O7-δXσ for the oxidative dehydrogenation of ethane (ODE) to ethene have been investigated. Under the reaction conditions of temperature=680°C, C2H6/O2/N2 molar ratio=2/1/3.7, and contact time=1.67×10-4 h g ml-1, YBa2Cu3O7-0.21F0.16 showed 84.1% C2H6 conversion, 81.8% C2H4 selectivity, and 68.8% C2H4 yield; YBa2Cu3O7-0.18Cl0.13 showed 92.5% C2H6 conversion, 72.0% C2H4 selectivity, and 66.6% C2H4 yield. The sustainable performance during a period of 40 h on-stream reaction at 680°C demonstrated that the F- and Cl-doped catalysts are durable. X-ray powder diffraction results indicated that the undoped YBa2Cu3O7-δ and halide-doped YBa2Cu3O7-δXσ were of triple-layered oxygen-deficient perovskite-type orthorhombic structure. The results of the X-ray photoelectron spectroscopy, thermal treatment, thermogravimetric analysis, and 18O2-pulsing studies indicated that the incorporation of halide ions into the YBa2Cu3O7-δ lattice enhanced the activity of lattice oxygen. According to the O2 temperature-programmed desorption and temperature-programmed reduction results, we conclude that the oxygen species desorbed at 610-710°C are active for the selective oxidation of ethane and those desorbed below 610°C are active for the total oxidation of ethane; a suitable oxygen nonstoichiometry and Cu3+ concentration in YBa2Cu3O7-δXσ are required for the best catalytic performance of the catalysts.

Original languageEnglish
Pages (from-to)65-79
Number of pages15
JournalJournal of Catalysis
Volume193
Issue number1
DOIs
Publication statusPublished - 1 Jul 2000

Scopus Subject Areas

  • Catalysis
  • Physical and Theoretical Chemistry

User-Defined Keywords

  • Ethane selective oxidation
  • Ethene generation
  • Halide-incorporated YBaCuO
  • ODE reaction
  • Oxidative dehydrogenation
  • Perovskite-type oxide catalyst
  • Superconducting material

Fingerprint

Dive into the research topics of 'YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>X<sub>σ</sub> (X=F and CI): Highly Active and Durable Catalysts for the Selective Oxidation of Ethane to Ethene'. Together they form a unique fingerprint.

Cite this