Zobrazeno 1 - 9 of 9 pro vyhledávání: '"Ioannis Gekas"'
1
Two Reaction Pathways in the Selective Catalytic Reduction of NO x by C6H14 Over Ag–Al2O3 with H2 Co-Feeding
Autor: Søren Dahl, P. V. Pributkov, A. Yu. Stakheev, N. S. Telegina, Ioannis Gekas, Galina N. Baeva, G. O. Bragina
Publikováno v: Topics in Catalysis. 52:1821-1825
The NO x reduction with n-C6H14 was studied over a 3% Ag/Al2O3 catalyst in the presence of hydrogen. The catalyst performance was evaluated by varying the H2 concentration from 0 to 1600 ppm and by comparing the results with blank runs in which an em
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02620b1336df3bfcc1bdfe81fe3bc61c
https://doi.org/10.1007/s11244-009-9356-4
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2
Nature of Active Sites of Fe-Beta Catalyst for NOx-SCR by NH3
Autor: Dmitry E. Doronkin, Martin Høj, Pär Gabrielsson, A. Yu. Stakheev, Søren Dahl, Ioannis Gekas, N. N. Tolkachev, Alexei V. Kucherov, Galina N. Baeva, M. Kustova, G. O. Bragina
Publikováno v: Topics in Catalysis. 52:1728-1733
A correlation of the reaction rate over Fe-Beta catalysts with a concentration of specific isolated Fe3+ sites represented by an ESR signal at g ≈ 4.3 and by UV adsorption bands with λmax
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2230a1d6f10ed08024ab40034781a19
https://doi.org/10.1007/s11244-009-9327-9
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3
Combined XPS and TPR study of sulfur removal from a Pt/BaO/Al2O3 NO x storage reduction catalyst
Autor: N. S. Teleguina, Pär Gabrielsson, A. Yu. Stakheev, Galina N. Baeva, G. O. Bragina, N. N. Tolkachev, Ioannis Gekas
Publikováno v: Topics in Catalysis. :143-147
Pt/Al2O3 and Pt/BaO/Al2O3 catalysts (1 wt% Pt, 10 wt%BaO) were sulfated under conditions simulating a real NSR catalyst operation. Comparative TPR and XPS studies of sulfur removal from Pt/Al2O3 and Pt/BaO/Al2O3 catalysts indicate that the sulfur rem
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f2a1b8384e0349e2c96dee519b24011
https://doi.org/10.1007/s11244-007-0167-1
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6
Performance of a Urea SCR System Combined with a PM and Fuel Optimized Heavy-Duty Diesel Engine Able to Achieve the Euro V Emission Limits
Autor: Ingvard Bjorn, Walter Reczek, Par Gabrielsson, Keld Johansen, Jens Husted Kjær, Ioannis Gekas, Wolfgang Cartellieri
Publikováno v: SAE Technical Paper Series.
In order to meet the Euro V heavy-duty diesel emission standard legislation limits, a diesel engine can be optimized by internal means to give low particulate emissions and lower fuel consumption. These modifications of the engine lead inevitably to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::401d600b98c17d887594082e494bf548
https://doi.org/10.4271/2002-01-2885
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7
Urea-SCR Catalyst System Selection for Fuel and PM Optimized Engines and a Demonstration of a Novel Urea Injection System
Autor: Keld Johansen, Ioannis Gekas, Thomas Lund, Nyengaard Lars Randel, Pär Gabrielsson
Publikováno v: SAE Technical Paper Series.
This paper discusses the choice of catalyst types to reduce the NOx emissions down to the Euro V level. A novel Urea injection system is also presented, which is based on a mass produced digital dosing pump that is combined with an electronic control
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d44c4422477ab56569fcf999274e975
https://doi.org/10.4271/2002-01-0289
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8
Combined Silencers and Urea-SCR Systems for Heavy-Duty Diesel Vehicles for OEM and Retrofit Markets
Autor: Søren Æ. Mikkelsen, Ioannis Gekas, Peter Schoubye, Svend Frederiksen, Pär Gabrielsson
Publikováno v: SAE Technical Paper Series.
Selective Catalytic Reduction (SCR) with NH3 or urea is one of the most effective methods for removal of NOx in exhaust from HD diesel engines with potential for achieving more than 90% NOx-reduction measured in the European transient or a US HD FTP
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::85b4b73a375f2e6149e8a1ccc4dcb3eb
https://doi.org/10.4271/2001-01-0517
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9
Nature of active sites in a Fe-Beta catalyst for NOx selective catalytic reduction by NH3
Autor: Pär Gabrielsson, Dmitrii E. Doronkin, Alexei V. Kucherov, Søren Dahl, Aleksandr Yu. Stakheev, G. O. Bragina, Galina N. Baeva, Ioannis Gekas, N. N. Tolkachev
Publikováno v: Mendeleev Communications. 17:309-310
A correlation is observed between the rate of NO x selective catalytic reduction by NH 3 over Fe-Beta and the number of isolated FeIII species characterised by an ESR signal at g ≈ 4.3, which is a function of total Fe loading and Si/Al ratio.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::87ef57b7ce75aa6eedbafeb14eaaf8fb
https://doi.org/10.1016/j.mencom.2007.11.001
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