Synthesis of Vanadium-Containing Catalytically Active Phases for Exhaust Gas Neutralizers of Motor Vehicles and Industrial Enterprises

The catalytically active vanadium-containing system of gamma-Al2O3 was studied using a wide range of physical and chemical methods, depending on the synthesis conditions. It is shown that the vanadium-containing system includes several complexes with different thermal stabilities and catalytic activities. Low-active complexes are destroyed with the formation of more active ones based on V2O5 oxide, as the temperature of heat treatment increases. It can be assumed that V2O5 oxide has the decisive role in its catalytic activity. It was concluded that the vanadium-containing catalytic system on aluminium oxide, in the studied temperature range, is thermally stable and shows high activity not only in the reduction of nitrogen oxides but also in the oxidation of hydrocarbons (even of the most difficult ones, such as oxidizable methane). These properties of the system make it quite promising in the field of application for the purification of the exhaust gases of motor transport and industrial enterprises with environmentally harmful components, as well as for understanding the mechanism of the action of the catalysts in these processes, which is very important for solving the problems of decarbonization and achieving carbon neutrality.

Automated summary

The catalytically active vanadium-containing system on gamma-Al2O3 was studied using various physical and chemical methods. The system was found to include different complexes with varying thermal stabilities and catalytic activities. Active complexes based on V2O5 oxide are formed as the temperature of heat treatment increases, suggesting V2O5 oxide plays a crucial role in the catalytic activity. The vanadium-containing catalytic system on aluminium oxide was shown to be thermally stable and highly active in both the reduction of nitrogen oxides and the oxidation of hydrocarbons, making it promising for applications in exhaust gas purification and understanding catalyst mechanisms in decarbonization processes.