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High rates of NO and N2O reduction by CO, CO and hydrocarbon oxidation by O2 over nano crystalline Ce0.98Pd0.02O2−δ: Catalytic and kinetic studies

Paper ID Volume ID Publish Year Pages File Format Full-Text
49043 46543 2007 9 PDF Available
Title
High rates of NO and N2O reduction by CO, CO and hydrocarbon oxidation by O2 over nano crystalline Ce0.98Pd0.02O2−δ: Catalytic and kinetic studies
Abstract

The catalyst Ce0.98Pd0.02O2−δ was synthesized by combustion synthesis method and characterized by XRD and XPS. The three way catalytic activity of this catalyst was investigated by performing NO + CO reaction and CO and hydrocarbon oxidation. The rates and the apparent activation energies of the reaction for NO reduction by CO and CO and hydrocarbon oxidation were determined and the rates were higher than the reported values. The N2 selectivity in NO + CO reaction was around 80% all over the temperature region and showed complete selectivity at high temperatures. A reaction mechanism of NO + CO reaction was proposed and the experimental findings were verified with the predicted model. The high rates of the NO + CO reactions even in the presence of oxygen and the complete selectivity to the products are rationalized by the high dissociative chemisorption of adsorbed NO over the catalyst, which is for the vacant sites in CeO2 lattice due to presence of Pd2+ in Ce4+ position. The catalyst also showed high rates and lower activation energies for the oxidation of CO and hydrocarbons.

Keywords
Three way catalyst; Hydrocarbon oxidation; CO + NO reaction; Kinetic models
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High rates of NO and N2O reduction by CO, CO and hydrocarbon oxidation by O2 over nano crystalline Ce0.98Pd0.02O2−δ: Catalytic and kinetic studies
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 71, Issues 1–2, 8 February 2007, Pages 23–31
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