Properties of CrOx/MCM-41 and Its Catalytic Activity in the Reaction of Propane Dehydrogenation in the Presence of CO2

Propylene is an important raw material for the production of many valuable compounds, especially polypropylene, consumption which continues to grow every year. The reaction oxidative dehydrogenation propane, where carbon dioxide used as a mild oxidant, promising method producing propylene. At same time, problem utilization greenhouse gas CO2 partially solved. synthesis and analysis physicochemical properties mesoporous silicate MCM-41 supported catalysts CrOx/MCM-41 prepared on its basis were carried out. These using incipient wetness impregnation. support characterized by methods low-temperature nitrogen adsorption, TG-DTA, XRD, SEM, TPR-H2, UV/Vis diffuse reflectance spectroscopy, small-angle X-ray scattering. It shown that chromium present in samples simultaneously form Cr3+ Cr6+. catalytic tests performed range 550–700 °C. highest selectivity propylene was observed 5%Cr/MCM-41 catalyst 76% at temperature 650 °C with propane conversion 20%. deposited Cr/MCM-41 Cr/SiO2 (Acros) compared. MCM-41-supported ~1.5 times higher than SiO2-supported catalyst.