Fundamental studies of hydrocarbon conversions over supported bimetallic catalysts.

摘要

The reactions of ethane and ethylene over selected silica-supported group 8 metal catalysts have been investigated using reaction studies and nuclear magnetic resonance (NMR) spectroscopy. The activity of the ruthenium-group IB bimetallic system for the ethane hydrogenolysis reaction was investigated as a function of group IB metal content and ethane and hydrogen partial pressures, while the reactions of ethylene over silica-supported platinum catalysts were studied using NMR. The turnover frequency of the silica-supported ruthenium catalysts for ethane hydrogenolysis as either copper or silver was added tended to change as the group IB metal was first added until a critical point was reached. The apparent orders of reaction for ethane hydrogenolysis over the ruthenium-group IB catalysts was measured as a function of temperature. The reactions of ethylene over silica-supported platinum catalysts has been investigated using NMR. The ethylene to surface platinum atom ratio used in this work was in the 10 to 20 range, far higher than that used for typical single crystal studies. (ERA citation 15:035195)