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

It is well known that V-Mg based complex oxide catalysts show a high activity for the oxidative dehydrogenation of 1-butene (1-C4H8) to buta-1,3-diene (BD). In this study, in order to improve the catalytic performance of V-Mg based complex oxides, we tried to add metal oxide such as Al2O3, Fe2O3, and Co2O3 and carried out the oxidative dehydrogenation (ODH) of 1-C4H8 without and with molecular O-2 at 480 degrees C. The addition of Co2O3 to the V-Mg complex oxides resulted in the highest BD yield of 22.5 % with only lattice oxygen of the catalyst. For continuous production of BD, the ODH under O-2 flow was also investigated. The V-Mg-Co catalyst exhibited higher 1-C4H8 conversion (28.5 %) and BD yield (17.5 %) than those of the V-Mg catalyst, and it was indicated that the high reactivity of the lattice oxygen affected the ODH under O-2 flow according to the pulse reaction of 1-C4H8 and O-18(2).