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Τίτλος: The mechanism of reduction of NO with H2 in strongly oxidizing conditions (H2-SCR) on a novel Pt/MgO-CeO2 catalyst: Effects of reaction temperature
Συγγραφείς: Efstathiou, Angelos M. 
Costa, Costas 
Savva, Petros G. 
Major Field of Science: Natural Sciences
Field Category: Chemical Sciences
Λέξεις-κλειδιά: Spectroscopy;Temperature;Catalyst supports;Chemical kinetics
Ημερομηνία Έκδοσης: 2008
Πηγή: Kinetics and Catalysis, 2008, vol. 49, iss. 5, pp. 743–747
Volume: 49
Issue: 5
Start page: 743
End page: 747
Περιοδικό: Kinetics and Catalysis 
Περίληψη: Steady State Isotopic Transient Kinetic Analysis (SSITKA) experiments using on-line Mass Spectrometry (MS) and in situ Diffuse Reflectance Infrared Fourier-Transform Spectroscopy (DRIFTS) have been performed to study essential mechanistic aspects of the Selective Catalytic Reduction of NO by H2 under strongly oxidizing conditions (H2-SCR) in the 120–300°C range over a novel 0.1 wt % Pt/MgO-CeO2 catalyst. The N-path of reaction from NO to the N2 gas product was probed by following the 14NO/H2O2 → 15NO/H2/O2 switch (SSITKA-MS and SSITKA-DRIFTS) at 1 bar total pressure. It was found that the N-pathway of reaction involves the formation of two active NO x species different in structure, one present on MgO and the other one on the CeO2 support surface. Inactive adsorbed NO x species were also found on both the MgO-CeO2 support and the Pt metal surfaces. The concentration (mol/g cat) of active NO x leading to N2 was found to change only slightly with reaction temperature in the 120–300°C range. This leads to the conclusion that other intrinsic kinetic reasons are responsible for the volcano-type conversion of NO versus the reaction temperature profile observed.
Description: Presented at III International Conference on Catalysis: Fundamentals and Applications, 2007, 4-8 July, Novosibirsk, Russia
URI: https://hdl.handle.net/20.500.14279/1278
ISSN: 16083210
DOI: 10.1134/S0023158408050200
Rights: © Pleiades
Type: Article
Affiliation: University of Cyprus 
Publication Type: Peer Reviewed
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