Oxidative dehydrogenation of propane by molecular chlorine

• Published in: Applied catalysis. A, General General, 2015-09, Vol.505, p.441-446
• Main Authors: Testova, N.V., Shalygin, A.S., Kaichev, V.V., Glazneva, T.S., Paukshtis, E.A., Parmon, V.N.
• Format: Article
• Language: English
• Subjects: Chlorine; Propane oxidative dehydrogenation; Ruthenium catalyst; Ruthenium oxychloride
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2015.05.018

•Oxidative dehydrogenation of propane by Cl2 was studied over Ru/TiO2 catalysts.•Selectivity toward propylene reached 95% at the propane conversion of 50%.•Ruthenium oxychloride was found to be the active component of the catalyst. The gas-phase oxidative dehydrogenation of propane by molecular chlorine was studied in a flow reactor with a fixed catalyst bed using a series of ruthenium–titania catalysts at temperatures between 150 and 450°C. It was found that Ru/TiO2 catalyst prepared by the incipient wetness impregnation of titania with an aqueous hydrochloric acid solution of K4[Ru2OCl10] revealed the highest catalytic activity. The selectivity toward propylene reached 95% at the propane conversion of 50% and the complete conversion of chlorine at 400°C. Propane consumption turnover frequency was 4510−3s−1 which is comparable with the highest known values obtained at the oxidative dehydrogenation of propane. Diffuse reflectance UV–vis spectroscopy and X-ray photoelectron spectroscopy study showed that ruthenium oxychloride was the active component of the catalyst.