Mathematical simulation of propane dehydrogenation involving oxygen on an alumina-chromium catalyst promoted with Co, Ni, Bi, and K oxides

Abstract

The rate laws of propane dehydrogenation involving oxygen on an alumina-chromium catalyst promoted with Co, Ni, Bi, and K oxides were studied. The reaction was carried out in a flow reactor in the temperature range of 560-640°C at residence times of 0.5-2.5 s. A kinetic model of the process according to a probable reaction scheme was proposed. The rate constants and activation energies of individual reactions that participate in the process were found. A mathematical model of the process was developed with consid eration for material and heat balances and hydrodynamic conditions. The concentration and temperature fields and pressure along the height of the catalyst bed were calculated. The dependences of the target product yield and process selectivity on the residence time were plotted.

State-of-the-art catalysts for direct dehydrogenation of propane to propylene

“…Furthermore, addition of Ni species can promote the formation of oligomeric Cr species and affects the valence of the surface Cr species present on supports, thus improving the performances of CrOx/Al2O3 catalysts [45]. Besides, Ce, Sb, Co, and Bi have been added to CrOx/Al2O3 catalysts [45][46][47][48]. The addition of these metal species can affect the oxygen capacity and magnetic properties of CrOx-based catalysts, which can positively contribute to the PDH process.…”