RESUMEN: We will present the results of adsorption isotherm experiments for Ar, Xe and CF4 on bundles of carbon nanotubes. The isotherm results will be used to determine the degree of occupation of the different sets of adsorption sites present on the bundles. The results will be compared to computer simulations for these systems. Adsorption isostherm measurements allow the determination of the isosteric heat of adsorption as a function of coverage. The isosteric heats of adsorption of the various gases will be presented, and the results will be discussed in terms of molecular size. We will also present experimental results regarding the adsorption kinetics for various gases on nanotube bundles, and we will compare them with recent theoretical calculations.