A method of temperature-programmed reduction (TPR) combined with simultaneo
us measurement of magnetization was used to show that the porous structure
of a support markedly affects the reduction kinetics of supported Co Fische
r-Tropsch catalysts. It was shown that 30% Co/ZrO2 + 6% Y2O3 catalysts rank
well below 30% Co/0.2% MgO/Al2O3 catalysts in both activity and selectivit
y. The catalysts with the smallest average particle size turned out to be t
he most active.