Oxidative Dehydrogenation of n‐Butene with V–Mg Complex Oxide with Added Trivalent Metal Oxide

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.

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiOx Metal Oxides Supported on Mesoporous SBA-15

“…All the catalysts were tested in the temperature range of 400–500 °C and the O 2 /feed ratio of 0.5 to 4.0 mol/mol. Kiyokawa et al investigated the oxidative dehydrogenation of n -butene using complex oxides of V-Mg-Fe at 480 °C using lattice oxygen. A BD selectivity of 38% was obtained at conversions of 53.9 and 49.2% for 1-butene and 2-butene feeds, respectively.…”

“…Various catalysts such as V-Mg complex oxide, metal ferrite catalysts, carbon nanotubes, Bi-Mo and Mo-V, and bismuth molybdate-based catalysts − have been utilized for 1-butene ODH. Catalysts based on Bi-Mo systems showed good performance in 1-butene ODH in the presence of steam.…”

Oxidative Dehydrogenation of But-1-ene to Buta-1,3-diene with V–Mg Complex Oxide Catalysts

“…Catalysts ous work 28) . Figure 2 shows the XRD patterns and the specific surface areas of V _ Mg and V _ Mg _ Fe catalysts.…”