Browsing by Subject "Nitrogen oxides"
Now showing items 1-18 of 18
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Article
Effects of W6+ doping of TiO2 on the reactivity of supported Rh toward NO: Transient FTIR and mass spectroscopy studies
(1997)The transient adsorption and dissociation of NO over Rh supported on undoped and W6+-doped TiO2 in the temperature range of 25-450°C has been studied by FTIR and mass spectroscopy. It was found that at 25 °C three kinds ...
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Article
Fourier transform infrared evidence for a ferric six-coordinate nitrosylheme b3 complex of cytochrome cbb3 oxidase from Pseudomonas stutzeri at ambient temperature
(2002)We report the first vibrational study of NO bound to an oxidized heme-copper oxidase. Cytochrome cbb3 oxidase from P. stutzeri reduces both O2 and NO to H2O and N2O, respectively. The ferric nitrosyl complex of cbb3 exhibits ...
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Article
Industrial H2-SCR of NO on a novel Pt/MgO-CeO2 catalyst
(2007)We describe here the performance of a novel MgO-CeO2-supported Pt (0.1 wt%) catalyst towards the selective conversion of NO into N2 (SN2 > 80%) by using H2 (H2-SCR) under process conditions similar to those encountered in ...
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Article
Interesting copper(ii)-assisted transformations of 2-acetylpyridine and 2-benzoylpyridine
(2016)The reactions of various copper(ii) sources with 2-acetylpyridine, (py)(me)CO, and 2-benzoylpyridine, (py)(ph)CO, under strongly basic conditions have been studied and novel ligand transformations have been discovered. ...
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Article
Low-temperature H2-SCR of NO on a novel Pt/MgO-CeO2 catalyst
(2007)The selective catalytic reduction of NO by H2 under strongly oxidizing conditions (H2-SCR) in the low-temperature range of 100-200 °C has been studied over Pt supported on a series of metal oxides (e.g., La2O3, MgO, Y2O3, ...
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Article
Mechanistic aspects of the H2-SCR of NO on a Novel Pt/MgO-CeO2 catalyst
(2007)Steady State Isotopic Transient Kinetic Analysis (SSITKA) coupled with Temperature-Programmed Surface Reaction (TPSR) experiments, using on line Mass Spectroscopy (MS) and in situ DRIFTS have been performed to study essential ...
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Article
Nitric-oxide reductase: Structure and properties of the catalytic site from resonance Raman scattering
(2002)We have applied resonance Raman spectroscopy to investigate the properties of the dinuclear center of oxidized, reduced, and NO-bound nitric-oxide reductase from Paracoccus denitrificans. The spectra of the oxidized enzyme ...
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Article
NO x control via H 2-selective catalytic reduction (H 2-SCR) technology for stationary and mobile applications
(2012)This review paper provides an overview of the use of hydrogen (H 2) gas towards the selective catalytic reduction of nitrogen oxides (NO x) under strongly oxidizing conditions found in many industrial flue gas streams and ...
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Article
Resonance raman spectroscopy of nitric oxide reductase and cbb3 Heme-Copper oxidase
(2008)Elucidating the structure and properties of the active sites in cbf 3 heme-copper oxidase and in nitric oxide reductase (Nor) is crucial in understanding the reaction mechanisms of oxygen and nitric oxide reduction by both ...
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Article
Selective catalytic reduction of nitric oxide by methane in the presence of oxygen over CaO catalyst
(1999)The selective catalytic reduction of nitric oxide by methane in the presence of oxygen was studied over CaO catalyst in the temperature range 550-850°C. The nitric oxide conversion-versus-temperature profile was found to ...
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Article
Selective catalytic reduction of NOx by hydrogen (H2-SCR) on WOx-promoted CezZr1-zO2 solids
(2014)The selective catalytic reduction of NOx by H2 (H2-SCR) under strongly oxidizing conditions (520ppm NOx/1% H2/5% O2/10% CO2/He
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Article
The structure of the hyponitrite species in a heme Fe-Cu binuclear center
(2007)NO laughing matter: The enzymatic production of laughing gas (N 2O) from two molecules of NO requires the formation of the N-N bond and the subsequent cleavage of the N-OH bond. Resonance Raman spectroscopic studies have ...
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Article
Synergistic effects of crystal phases and mixed valences in La-Sr-Ce-Fe-O mixed oxidic/perovskitic solids on their catalytic activity for the NO+CO reaction
(2000)Mixed oxidic and perovskite-type materials based on the La, Sr, Ce and Fe elements were prepared using a mixture of nitrates salts and heating at 1000°C. Three groups of solids were synthesized: (i) La(1-y)Ce(y)FeO3 (y=0.2, ...
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Article
Time-Resolved Resonance Raman and Time-Resolved Step-Scan FTIR Studies of Nitric Oxide Reductase from Paracoccus denitrificans: Comparison of the Heme b3-FeB Site to That of the Heme-CuB in Oxidases
(2003)Time-resolved resonance Raman (TR3) and time-resolved step-scan (TRS2) FTIR spectroscopies have been used to probe the structural dynamics at the heme b3 proximal and distal sites after carbon monoxide photolysis from fully ...
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Article
Transient isotopic kinetic study of the NO/H2/O2 (lean de-NOx) reaction on Pt/SiO2 and Pt/La-Ce-Mn-O catalysts
(2004)Steady-state isotopic transient kinetic analysis (SSITKA) coupled with temperature-programmed surface reaction (TPSR) methods and using in situ mass spectroscopy and DRIFTS have been applied for the first time to study ...
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Doctoral Thesis Open Access
Εκλεκτική καταλυτική αναγωγή NOx με H2 (H2-SCR) σε στηριζόμενους καταλύτες Pt : επίδραση υποστρώματος και προωθητών (Pd και V)
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2011-12)Η παρούσα Διδακτορική Διατριβή αναφέρεται στην ενδελεχή μελέτη της αντίδρασης εκλεκτικής καταλυτικής αναγωγής του μονοξειδίου του αζώτου (NO) σε ισχυρά οξειδωτικές συνθήκες (>2.5 vol% O2) και παρουσία (... περιέχονται ...
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Doctoral Thesis Open Access
Καταλυτική αναγωγή ΝΟ σε ισχυρά οξειδωτικές συνθήκες με χρήση CH4 και H2 σε στερεά La2O3-CaO και Pd/Υπόστρωμα
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2006-06)Η μείωση των εκπομπών οξειδίων αζώτου ΝΟx στην ατμόσφαιρα σε συνθήκες πλούσιες σε οξυγόνο (lean de-NOx) με τη χρήση νέων φιλικών προς στο περιβάλλον καταλυτικών τεχνολογιών είναι ένα από τα κυριότερα περιβαλλοντικά θέματα ...
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Doctoral Thesis Open Access
Σύνθεση νέων καταλυτών με εφαρμογές στις τεχνολογίες DE-NOx με χρήση H2 (H2-SCR) και παραγωγής καθαρού H2
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2008-05)Το υδρογόνο αναμένεται να αποτελέσει το σημαντικότερο φορέα ενέργειας με σημαντικά μειωμένες επιπτώσεις στο περιβάλλον (π.χ., κελιά καυσίμου υδρογόνου) σε σχέση με τα συμβατικά ορυκτά καύσιμα. Συμβατικές τεχνολογίες παραγωγής ...