Theory of the Propane Cracking Catalyst

As a result, the activity of the studied catalytic systems decreases, and the reaction mainly proceeds via the mechanism of carbon skeleton destruction. The maximum degree of propane conversion—68% with a selectivity of 65% for propylene—is achieved at a temperature of 700 °C when using a nanocrystalline composite material. It has been established that this composite possesses surface area and acidity values close to those of a titanium-containing zeolite of the MFI type. The composite material promotes better adsorption of propane molecules at the catalytic center and facilitates C–H bond cleavage. The catalytic activity of materials consisting of a mechanical mixture of titanium oxide with aluminum oxide, as well as highly porous titanium oxide, turned out to be significantly lower than that of the composite catalyst. All studied catalytic systems demonstrated high resistance to surface deactivation due to the deposition of amorphous carbon.