Oxidative Dehydrogenation of n‐Butene with V–Mg Complex Oxide with Added Trivalent Metal Oxide. Issue 3 (21st January 2019)

• Record Type: Journal Article
• Authors: Kiyokawa, Takayasu; Hagihara, Takashi; Ikenaga, Naoki
• Is Part Of: ChemistrySelect. Volume 4:Issue 3(2019)
• Page Start: 906
• Page End: 913
• Publication Date: 2019-01-21
• Subjects: Buta-1, 3-diene -- n-Butene -- Oxidative Dehydrogenation -- V−Mg complex oxide; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201803392
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Oxidative dehydrogenation (ODH) of n‐butene with V−Mg complex oxide catalysts was carried out with a fixed‐bed flow reactor at 480 °C. In order to improve the catalytic performance of V−Mg complex oxide, we examined the effect of added metal oxide on the ODH of n‐butene. When Fe was added to the V−Mg complex oxide, the reactivity of lattice oxygen in the V−Mg complex oxide increased. V−Mg‐Fe(20:30:10) prepared at a molar ratio of V:Mg:Fe=20:30:10 showed high conversion (53.9%) and buta‐1, 3‐diene (BD) yield (20.3%) in the ODH with the lattice oxygen. To continuously produce BD, ODH under O2 flow was also investigated. The V−Mg‐Fe(20:30:10) catalyst exhibited higher BD yield than the V−Mg catalyst, and it was indicated that the high reactivity of the lattice oxygen affected the ODH under O2 flow. Moreover, the V−Mg‐Fe(20:30:10)‐800 catalyst calcined at 800 °C showed highly stable ODH activity, and the BD yield (11%) was maintained for 420 min. XRD analysis results of the catalyst showed that the maintenance of the ODH activity could be attributed to the maintenance of the crystalline structure of V−Mg‐Fe(20:30:10)‐800 during the reaction. Abstract : Improvement of the ODH activity of V–Mg complex oxide: The ODH activity of n‐butene of V−Mg complex oxide could be improved by adding Fe species. In addition, this catalyst enabled butadiene production for a long time without a decrease in the ODH activity.