bifunctional catalyst

 A bifunctional catalyst is a combination of two catalyst components with different functions, which is produced because the reaction needs to be carried out on their respective independent active centers to complete.

There are many application examples of bifunctional catalysts in the petroleum industry, the most typical of which is the platinum reforming catalyst used for producing gasoline from naphtha. It is a supported catalyst with a platinum content of 0.5% -1.0% dispersed on γ (η) - Al2O3. The dual functional properties of such catalysts can also be verified from another perspective. For example, mercury was used to poison precious metal components, resulting in a significant reduction in the hydrogenation activity of the catalyst, while the impact on isomerization reactions was minimal. This indicates that hydrogenation and isomerization reactions occur independently of each other and occur on the metal and acidic sites of the amberlyst15 catalyst surface, respectively.

At present, dual function reforming catalysts have evolved from single metal to multi metal, such as platinum rhenium, platinum tin, platinum iridium, etc., greatly improving catalyst performance, increasing petroleum processing efficiency and gasoline octane value, while also promoting the in-depth development of basic research.