Kinetics of n -hexane isomerization over supported palladium catalysts

The steady- and unsteady-state kinetics of n-hexane isomerization over Ni- or Co-promoted Pd/HZSM-5 catalysts in the presence of hydrogen has been investigated. The kinetics of the reaction is described by similar fractional rational rate equations differing in the values of their constants. Hydrogen exerts a favorable effect on the isomerization rate. The catalysts have been characterized by the BET-N2 method, X-ray diffraction, transmission electron microscopy, H2-TPR, and NH3-TPD. The introduction of a promoter (Ni or Со) strengthens the adsorption of the reactants and increases the amount of reactants adsorbed.