The catalytic selective reduction of NO over metal‐exchanged (ZnII, AgI) natural zeolites (mordenite and clinoptilolite) from Cuba using NH3 as a reducing agent in the presence of excess oxygen was studied. Both transition metals slightly improve the catalytic performance for the NO reduction. ZnII‐exchanged zeolites exhibit a moderate catalytic activity, with conversions of NO of ≈58 % and high selectivity to N2 at high temperatures.
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Moreno‐Tost et al. (2005) studied this question.
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