The Effect of the Presence of GdVO₃ and GdVO₄ in the Conversion of Propane

The GdVO₃ and GdVO₄ catalyst has been prepared via solid-phase synthesis. It has been shown by a complex of physical and chemical methods that or GdVO₃, the main one is the phase with the structure of the first homologue of the Roldlesden-Popper series of a rhombical distorted perovskite. Orthovanadate of GdVO₄ crystallize in the structural type of zircon. The catalytic properties of GdVO₃ and GdVO₄ are studied in the propane cracking process to form propylene and ethylene. It was found that GdVO₃ and GdVO₄ has a high selectivity and catalytic properties. It was shown that propane conversion started at 773 K, was only 2% at 873 K, and raising the temperature to 923 K increased propane conversion to 21%. In the presence of GdVO₄ and GdVO₃, a considerable increase in propane conversion was observed that reached 60% at 923 K. The structure of the catalyst is stable under the conditions of preferential C₃H₈ reduction. Deactivation was much faster with GdVO₃, and it was observed after 20 h of operation at a rate that was slightly slower than the one for GdVO₄.