Ruthenium-containing polymer-stabilized catalyst system for the hydrogenation of benzene-toluene mixtures

The study is aimed at creating a polymer-stabilized ruthenium-containing catalytic system for liquid-phase hydrogenation of arenes in alkanes, including the creation of catalytic systems for upgrading the fuels of internal combustion engines. As a catalyst system, a catalyst based on ruthenium compounds stabilized in an industrial hypercrosslinced polystyrene MN100 has been proposed. Dodecane was selected as a model reaction solvent. During the study, the effect of temperature and pressure of hydrogen on the speed and differential selectivity of the hydrogenation of benzene and toluene in their mixture in dodecane was studied. It was shown that the differential selectivity of hydrogenation with respect to benzene increases with temperature up to 160°C and decreases with an increase in the total pressure in the reaction mixture. A study of the nature of the active phase of the catalytic system by X-ray photoelectron spectroscopy showed that ruthenium (IV) oxide is formed during the reduction of the catalyst.