The reforming reactions of cyclohexane, methyl cyclopentane and n-heptane on the Pd/gamma-Al2O3 and PdLn/gamma-Al2O3 (Ln=Dy, Ho, Tm) catalysts have been investigated. The results demonstrate that Pd-Ln/gamma-Al2O3 catalysts evince high activity and stability compared to Pd/gamma-Al2O3 catalysts. Owing to the different lanthanide content in the catalysts, the aromatisation and isomerization yields are different in the reforming reactions of n-heptane and cyclopentane. It is interesting to investigate the optimum content of lanthanides which gives the maximum aromatisation and isomerization yield.