dc.contributor.author | Costa, Costas N. | en |
dc.contributor.author | Savva, Petros G. | en |
dc.contributor.author | Andronikou, Ch | en |
dc.contributor.author | Lambrou, Panayiota S. | en |
dc.contributor.author | Polychronopoulou, Kyriaki | en |
dc.contributor.author | Belessi, Vassiliki C. | en |
dc.contributor.author | Stathopoulos, Vassilis N. | en |
dc.contributor.author | Pomonis, Phillippos J. | en |
dc.contributor.author | Efstathiou, Angelos M. | en |
dc.creator | Costa, Costas N. | en |
dc.creator | Savva, Petros G. | en |
dc.creator | Andronikou, Ch | en |
dc.creator | Lambrou, Panayiota S. | en |
dc.creator | Polychronopoulou, Kyriaki | en |
dc.creator | Belessi, Vassiliki C. | en |
dc.creator | Stathopoulos, Vassilis N. | en |
dc.creator | Pomonis, Phillippos J. | en |
dc.creator | Efstathiou, Angelos M. | en |
dc.date.accessioned | 2019-11-21T06:18:38Z | |
dc.date.available | 2019-11-21T06:18:38Z | |
dc.date.issued | 2002 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55389 | |
dc.description.abstract | A 0.1 wt% Pt supported on La0.7Sr0.2Ce0.1FeO3 solid (mixed oxide containing LaFeO3, SrFeO3-x, CeO2, and Fe2O3 phases) has been studied for the NO/H2/O2 reaction in the 100-400°C range. For a critical comparison, 0.1 wt% Pt was supported on SiO2, CeO2, and Fe2O3 and tested under the same reaction conditions. For the Pt/La0.7Sr0.2Ce0.1FeO3 catalyst a maximum in the NO conversion (83%) has been observed at 150°C with a N2 selectivity value of 93%, while for the Pt/SiO2 catalyst at 120°C (82% conversion) with a N2 selectivity value of 65% using a GHSV of 80, 000 h−1 Low N2 selectivity values, less than 45%, were obtained with the Pt/CeO2 and Pt/Fe2O3 catalysts in the 100-400°C range. For the Pt/La0.7Sr0.2Ce0.1FeO3 catalyst, addition of 5% H2O in the feed stream at 140°C resulted in a widening of the operating temperature window with appreciable NO conversion and no negative effect on the stability of the catalyst during 20 h on stream. In addition, a remarkable N2 yield (93%) after 20 h on 0.25% NO/1% H2/5% O2/5% H2O/He gas stream at 140°C has been observed. Remarkable N2 selectivity values in the range of 80-90% have also been observed in the 100-200°C low-temperature range either in the absence or in the presence of water in the feed stream. A maximum specific integral reaction rate of 443.5 μmol N2/s·g of Pt metal was measured at 160°C during reaction with a 0.25% NO/1% H2/5% O2/5% H2O/He gas mixture. This value is higher by 90% than the corresponding one observed on the 0.1 wt% Pt/SiO2 catalyst at 120°C and it is the highest value ever reported for the reaction at hand in the 100-200°C low-temperature range on Pt-based catalysts. A TOF value of 13.4 × 10−2 s−1 for N2 formation was calculated at 110°C for the Pt/La0.7Sr0.2Ce0.1FeO3 catalyst. Temperature-programmed desorption (TPD) of NO and transient titration experiments of the catalyst surface following NO/H2/O2 reaction have revealed important information concerning the amount and chemical composition of active and inactive (spectator) adsorbed N-containing species present under reaction conditions. © 2002 Elsevier Science (USA). | en |
dc.source | Journal of Catalysis | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037173403&doi=10.1006%2fjcat.2002.3645&partnerID=40&md5=c82c8b83cafeb1e297cec22ccd99cecc | |
dc.subject | NO TPD | en |
dc.subject | NO reduction | en |
dc.subject | Lean de-NOx | en |
dc.subject | Perovskites | en |
dc.title | An investigation of the NO/H2/O2 (Lean De-NOx) reaction on a highly active and selective Pt/La0.7Sr0.2Ce0.1FeO3 catalyst at low temperatures | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1006/jcat.2002.3645 | |
dc.description.volume | 209 | |
dc.description.issue | 2 | |
dc.description.startingpage | 456 | |
dc.description.endingpage | 471 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :84</p> | en |
dc.source.abbreviation | J.Catal. | en |
dc.contributor.orcid | Efstathiou, Angelos M. [0000-0001-8393-8800] | |
dc.contributor.orcid | Polychronopoulou, Kyriaki [0000-0002-0723-9941] | |
dc.contributor.orcid | Belessi, Vassiliki C. [0000-0002-9866-7668] | |
dc.contributor.orcid | Costa, Costas N. [0000-0002-8459-0356] | |
dc.contributor.orcid | Stathopoulos, Vassilis N. [0000-0001-8575-2313] | |
dc.contributor.orcid | Savva, Petros G. [0000-0001-6390-315X] | |
dc.gnosis.orcid | 0000-0001-8393-8800 | |
dc.gnosis.orcid | 0000-0002-0723-9941 | |
dc.gnosis.orcid | 0000-0002-9866-7668 | |
dc.gnosis.orcid | 0000-0002-8459-0356 | |
dc.gnosis.orcid | 0000-0001-8575-2313 | |
dc.gnosis.orcid | 0000-0001-6390-315X | |