A crucial turn in the investigation on NO decomposition occured when Iwamoto et al [1] first found that copper-exchanged zeolites, in particular Cu-ZSM-5 zeolites, were effective catalysts for NO decomposition. These catalysts have been the object of the most active investigations ever since. Due to small pore size of zeolites, the reactant diffusion seems play an important part in the reaction kinetics. This article is aimed to evaluate the role of diffusion by means of activation energy of NO decomposition on Me/Zeolites ZSM-5 and mordenit.
