ИСТИНА

Catalytic dehydrogenation of light paraffins, including propane, is one of the most promising methods for olefins production. Difficulties of the propane dehydrogenation reaction are associated with some factors: high endothermic effect, the decrease of equilibrium conversion with an increase in partial pressure of propane, and coke formation. The development of effective catalysts that are stable at high temperatures is urgent task. The highly dispersed amorphous Cr2O3 particles demonstrate the high activity in this reaction. A promising way to increase the activity of chromium catalysts in PDH is the co-existence of CrOx and coordinatively unsaturated Zr4+ sites. A series of CrOx-ZrO2-SiO2 (CrZrSi) catalysts with high specific surface area using the one-pot template-assisted evaporation-induced self-assembly process was synthesized. The chromium content was varied from 4 to 9 wt.% assuming Cr2O3 stoichiometry. The catalysts were investigated by XRD, SEM-EDX, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR-H2). The catalysts were tested in non-oxidative propane dehydrogenation at 500–600°C using flow-type fixed-bed reactor.