Effect of calcination temperature on isobutane dehydrogenation over Mo/MgAl2O4 catalysts

• Mo/MgAl2O4 catalysts exhibited excellent performance for isobutane dehydrogenation.
• Calcination temperature affects the catalyst structure and properties.
• Catalytic performance is closely related to the calcination temperature.
• The effect of calcination temperature varied obviously with different Mo loadings.

The catalytic activity of a novel catalyst Mo/MgAl2O4 was studied in isobutane dehydrogenation, and the effect of calcination temperature has been comprehensively investigated. For catalysts with MoO3 loading below monolayer coverage (5Mo/MgAl2O4), isobutane conversion increases with calcination temperature, while the selectivity to isobutene decreases. An opposite trend is observed for catalysts with MoO3 loading above monolayer coverage (30Mo/MgAl2O4). In combination with characterization results, it can be concluded that calcination temperature affects catalyst structure and properties in many aspects including surface area, acidity and reducibility, as well as the interaction between Mo species and support, and thus influences the catalytic behaviors.

Figure optionsDownload as PowerPoint slide