Kinetics of propene hydrogenation over Pt and Pt-Sn supported on polyamide

The rate of propene hydrogenation has been measured, in a flow system, over platinum supported on inorganic materials (Al,O, and MgO) and polyamides (Nylon 66 and Nylon 610). The effect of adding tin to Pt/Nylon 66 has also been investigated. The orders of reaction with respect to the reactants have been found to be strongly influenced by the nature of the support used. In particular, higher values of the reaction order with respect to propene have been found on Pt/Nylon samples. The presence of electron-deficient sites is suggested. Addition of Sn causes a drastic decrease in catalytic activity, suggesting Sn enrichment on the surface and/or an
electronic interaction between the two metal components.