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.
Scopus Subject Areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry