Fe-ZSM-5 for Selective Catalytic Reduction of NO with NH3: A Comparative Study of Different Preparation Techniques |
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| Authors: | RQ Long RT Yang |
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| Affiliation: | (1) Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109-2136, USA |
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| Abstract: | Fe-ZSM-5 are prepared by using four different techniques: conventional aqueous ion-exchange (CA), improved aqueous ion-exchange (IA), solid-state ion-exchange (SS) and chemical vapor ion-exchange (CV). All of the catalysts show very high activities for selective catalytic reduction (SCR) of NO with ammonia. However, the activities are different and follow the sequence of Fe-ZSM-5 (IA) > Fe-ZSM-5 (CA), Fe-ZSM-5 (SS) > Fe-ZSM-5 (CV). ESR results indicate that Fe3+ ions with tetrahedral coordination are the active sites for the SCR reaction. |
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| Keywords: | Fe-exchanged ZSM-5 selective catalytic reduction SCR of NO with ammonia ion-exchange catalyst preparation |
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