Ziegler Systems Based on Bis-(acetylacetonate) Cobalt: Benzene Hydrogenation Nanoscale Catalysis

Abstract

The turnover frequencies of catalytic systems based on Со(acac)2–AlEt3 or AlEt2(OEt) in the hydrogenation of benzene have been determined at temperatures of 80–150 °С, initial РН2 = 15 bar, and Al/Со ratios = 1–8. It has been shown that the benzene hydrogenation rate is directly proportional to the Со(acac)2 concentration and hydrogen pressure, while it does not depend on the concentration of benzene at СС6Н6 > 1 × 10−2 mol/L. The parameters of the Arrhenius equation in the hydrogenation of benzene for the systems based on Со(асас)2–AlEt3/AlEt2(OEt) were determined. It has been found that nanosized particles containing cobalt in the zero oxidation state exhibit catalytic activity in the benzene hydrogenation.