THE EFFECT OF THE REVERSED MICELLAR SYSTEMS ON THE CATALYTIC ACTIVITYOF MONODISPERSE CATALYSTS - I - THE LIQUID-PHASE HYDROGENATION OF STYRENE OVER THE NICKEL BORIDE CATALYST PREPARED IN THE CTAB 1-HEXANOL/WATER REVERSED MICELLAR SYSTEMS/

Monodisperse nickel boride catalysts are prepared from reversed micell ar systems in situ and used directly as the catalysts of styrene hydro genation. In order to investigate the influence of particle size and t he effect of micellar components on the hydrogenating activity of nick el boride catalysts, the hydrogenation of styrene over nickel boride c atalysts has been done, respectively, in ethanol solution, reversed mi cellar solution and various mixtures of reversed micellar solution wit h ethanol. The experimental results have shown that monodisperse nicke l boride particles exhibit higher hydrogenation activity than those pr epared in ethanol solution. On the other hand, the presence of a micel lar system has an inhibiting effect on the hydrogenation activity of n ickel boride particles, and the inhibiting effect is discussed in deta il.