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The catalytic performance and characterization of a durable perovskite-type chloro-oxide SrFeO3–δClσ catalyst selective for the oxidative dehydrogenation of ethane

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Abstract

The catalytic performances and properties of SrFeO3-0.190 and SrFeO3-0.382Cl0.443 catalysts have been investigated for the oxidative dehydrogenation of ethane (ODE). XRD results showed that both catalysts exhibited oxygen-deficient perovskite-type structures. The inclusion of chloride ions in the SrFeO3-δlattice matrix can significantly enhance ethene selectivity and ethane conversion. The SrFeO3-0.382Cl0.443 catalyst showed an ethane conversion of ca. 90%, an ethene selectivity of ca. 70%, and an ethene yield of ca. 63% under the reaction conditions: C2H6:O2:N2 = 2:1:3.7, temperature 680°C, and space velocity 6000 ml h-1 g-1. With the increase of space velocity, ethane conversion decreased, whereas ethene selectivity increased over SrFeO3-0.382Cl0.443. Lifetime studies showed that the perovskite-type chloro-oxide catalyst was durable. The results of O2-TPD and TPR experiments illustrated that the implanted chloride ions caused the oxygen nature of SrFeO3-δ to change. By regulating the concentration of oxygen vacancies and the Fe4+/Fe ratio in this perovskite-type chloro-oxide catalyst, one can generate a durable chloro-oxide catalyst for the ODE reaction with excellent performance.

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Authors and Affiliations

  1. Chemistry Department and Center for Surface Analysis and Research, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China

    H.X. Dai, C.F. Ng & C.T. Au

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  1. H.X. Dai
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  2. C.F. Ng
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Dai, H., Ng, C. & Au, C. The catalytic performance and characterization of a durable perovskite-type chloro-oxide SrFeO3–δClσ catalyst selective for the oxidative dehydrogenation of ethane. Catalysis Letters 57, 115–120 (1999). https://doi.org/10.1023/A:1019091414588

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