Collect. Czech. Chem. Commun. 1983, 48, 2269-2272

The effect of sulphidation on the nature of active sites on nickel-molybdenum-alumina hydrorefining catalysts

Rafael López

Centro de Investigationes Quimicas, Washington 169, Cerro, La Habana, Cuba


A strong influence of sulphidation on the hydrogenation and hydrogenolytic activity of Mo-Al2O3 and Ni-Mo-Al2O3 hydrotreating catalysts has been found. Two kinds of active sites are distinguished, the first consisting of surface molybdenum atoms and serving mostly for hydrogenation, the second type formed by interaction of Mo with Ni atoms and being active in sulphided form for direct hydrogenolysis of the C-S bonds.