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Self oscillatory behaviour in N2O decomposition over Co-ZSM-5 catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
48089 46492 2009 11 PDF Available
Title
Self oscillatory behaviour in N2O decomposition over Co-ZSM-5 catalysts
Abstract

Isothermal oscillations developed during N2O decomposition over Co-ZSM-5 catalysts with different Si/Al ratios have been investigated. Spontaneous oscillations were observed between 350 and 450 °C. The maximum amplitude has been obtained for the catalysts having Si/Al of 40 and 50. The activation energies of the obtained oscillations were calculated in respect to cobalt concentration. The results showed that the Ea values increase linearly with an increasing Si/Al ratio of the zeolite. For Co-ZSM-5 catalyst (Si/Al = 25), increasing cobalt content in the catalyst led to a decrease in the frequency as well as the amplitude of the oscillations. Meanwhile, the increase in the Ea values was observed. The calculated reaction rate was found to be first order with respect to nitrous oxide concentration. Moreover, the developed oscillations were found to be sensitive to inlet N2O concentration, catalyst weight and milling time duration. Decreasing the N2O inlet concentration as well as the catalyst weight and increasing the milling time would lead to a quenching of the developed oscillations.

Keywords
Co-ZSM-5; N2O kinetic oscillation; N2O; Nitrous oxide decomposition; Solid-state ion exchange
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Self oscillatory behaviour in N2O decomposition over Co-ZSM-5 catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 85, Issues 3–4, 12 January 2009, Pages 120–130
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us