Kinetic analysis of the decomposition of nitrous oxide over ZSM-5 catalysts
- Delft Univ. of Technology (Netherlands)
- Instituto Nacional del Carbon, Oviedo (Spain); and others
A detailed comparative kinetic analysis has been made of the N{sub 2}O decomposition over Co-, Fe-, and Cu-ZSM-5. The effect of partial pressure of N{sub 2}O, O{sub 2}, CO, and NO, the space time, and temperature have been investigated. The decomposition is first order in N{sub 2}O over Fe- and Co-ZSM-5 and has a slightly lower order over the Cu sample. Inhibition of oxygen observed for Cu-ZSM-5 is absent for Co and for Fe at the lower temperatures. N{sub 2}O destruction is enhanced by CO for all catalysts and by NO for Fe-ZSM-5 only. In the presence of NO, NO{sub 2} is produced over Fe- and Co-ZSM-5. Over Cu-ZSM-5 the enhancement by CO passes through a maximum as a function of CO pressure due to the strong adsorption at reduced sites. A detailed kinetic model that accounts quantitatively for the observed dependencies and which deviates from the classical model for oxidic systems is advanced. Estimates of the maximum turnover rates for the various model steps range from 10{sup -4} to 1 s{sup -1}. 46 refs., 9 figs., 4 tabs.
- OSTI ID:
- 563517
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 167; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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