Please use this identifier to cite or link to this item:
Title: 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
Authors: Efstathiou, Angelos M. 
Costa, Costas 
Savva, Petros G. 
Keywords: Spectroscopy;Temperature;Catalyst supports;Chemical kinetics
Issue Date: 2008
Publisher: Pleiades
Source: Kinetics and Catalysis, 2008, Volume 49, Issue 5, Pages 743–747
Abstract: 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.
ISSN: 0023-1584 (print)
1608-3210 (electronic)
DOI: 10.1134/S0023158408050200
Rights: © Pleiades Publishing, Ltd
Type: Article
Appears in Collections:Άρθρα/Articles

Show full item record

Citations 20

checked on Dec 15, 2018

Citations 10

Last Week
Last month
checked on Dec 12, 2018

Page view(s)

Last Week
Last month
checked on Dec 17, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.