Pt/Al-HMS/HZSM-5 catalysts with various amounts of Si/Al ratios were evaluated for the n-heptane isomerization reaction at 200-350 degrees C. To study the catalyst characterizations, X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), temperature-programmed desorption of ammonia (NH3-TPD), FTIR of adsorbed pyridine (Py-IR), H-2 chemisorption, nitrogen adsorption-desorption, and thermogravimetric analysis (TGA) techniques were performed. Kinetics of n-heptane isomerization was investigated under various hydrogen and n-heptane pressures. For more studies, two kinetic models have also been selected,and tested to describe the kinetics for this reaction. Both used models, the power law and Langmuir-Hinshelwood provided a good fit toward the experimental data and allowed for the determination of the kinetic parameters. According to these studies, the Pt/Al(45)-HMS/HZSM-5 catalyst has better properties than other prepared catalysts for the isomerization reaction.