An. Startsev et al., ALUMINA-SUPPORTED SULFIDED CATALYSTS .5. EFFECT OF P AND F ON THE CATALYTIC ACTIVITY OF HYDRODESULFURIZATION SULFIDED CATALYSTS, Kinetics and catalysis, 35(4), 1994, pp. 552-558
Phosphorus and fluorine additives incorporated into the Ni-Mo/Al2O3 su
lfided catalysts on various stages of their preparation considerably l
ower the activation energy of the thiophene hydrogenolysis reaction. T
he interaction of promoting additives with the active component of the
hydrodesulfurization catalysts is proved by XPS and P-31 NMR. The eff
ect of additives is discussed in terms of a synchronous mechanism invo
lving interaction of reacting molecules in the coordination sphere of
a bimetallic sulfide compound.