Perovskite-type chloro-oxide SrCoO3-δClσ: A novel and durable catalyst 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

5 Citations (Scopus)

Abstract

The catalytic performances and characterization of SrCoO3-0. 401 and SrCoO3-0. 450Cl0. 126 catalysts have been investigated for the oxidative dehydrogenation of ethane (ODE) to ethene. XRD results indicated that both catalysts were of cubic perovskite-type structures. The incorporation of chloride ions in the SrCoO3-δ lattice can significantly enhance C2H6 conversion and C2H4 selectivity. The catalyst showed 89. 6% C2H6 conversion, 67. 1% C2H4 selectivity, and 60. 1% C2H4 yield under the reaction conditions of C2H6/O2/N2 = 2/1/3. 7, temperature = 660°C, and space velocity = 6000 mL h-1 g-1. Over SrCoO3-0. 450Cl0. 126, with the rise in space velocity, C2H6 conversion decreased, whereas C2H6 selectivity increased. Life studies showed that SrCoO3-0. 450Cl0. 126 was durable. The results of XPS and pulsing studies indicated that the inclusion of chloride ions in the SrCoO3-δ lattice could promote lattice oxygen mobility. Based on the results of O2-TPD and TPR studies, we suggest that the oxygen species desorbed at ca 695°C were active for the selective oxidation of ethane. By regulating the oxygen vacancy density and Co4+/Co ratio in the perovskite-type chloro-oxide catalyst, one can generate a durable catalyst with excellent performance for the ODE reaction.

Original languageEnglish
Pages (from-to)1757-1762
Number of pages6
JournalStudies in Surface Science and Catalysis
Volume130 B
DOIs
Publication statusPublished - 2000

Scopus Subject Areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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