The capacity of natural zeolites (ZAPS, ZNT, and ZSL) to adsorb N2O and NO in both static and dynamic regimes was studied experimentally. It was found that the cations present in the zeolites act as centers of adsorption for both gases, suggesting their competitive adsorption. However, a considerable difference was observed among the capacities of the zeolites to adsorb these two gases, which can be used for the separation of N2O-NO mixtures. Adsorption of NO on the three samples showed diffusion-activated.