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N2O decomposition over [Fe]-ZSM-5 and Fe-HZSM-5 zeolites |
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| Authors: | Y. -F. Chang J. G. McCarty Y. L. Zhang |
| Affiliation: | (1) Materials Research Center, SRI International, 333 Ravenswood Ave., 94025 Menlo Park, CA, USA;(2) Chemistry Department, Fudan University, 200433 Shanghai, PR China |
| Abstract: | The N2O decomposition over an [Fe]-ZSM-5 and an Fe-HZSM-5 zeolite was studied. We found that framework incorporated iron species were much more active than Fe(III) introduced as framework charge countercations by ion exchange (TOF at 0.1 vol% N2O:1.47 × 10–4 at 280°C for [Fe]-ZSM-5 vs. 2.58 × 10–4 at 468°C for Fe-HZSM-5). The higher activity of [Fe]-ZSM-5 was attributed to the uniqueness of framework iron species. Both [Fe]-ZSM-5 and Fe-HZSM-5 zeolites showed enhanced activity in the presence of excess oxygen. This is in sharp contrast to ruthenium exchanged zeolites which showed strong oxygen inhibiting effect on the rate of N2O decomposition. |
| Keywords: | N2O (nitrous oxide) catalytic decomposition [Fe]-ZSM-5 zeolite catalyst Fe-HZSM-5 catalyst effect of oxygen on N2O decomposition rate |
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