Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ulrich Dr. Göbel"'
Radio Frequency-Based Determination of the Oxygen and the NOx Storage Level of NOx Storage Catalysts
Publikováno v:
Topics in Catalysis. 62:157-163
In recent years, research on radio frequency-based (also known as “microwave-based”) catalyst state diagnosis for diesel engines has focused mainly on SCR systems. To increase the efficiency of exhaust aftertreatment systems, SCR catalysts can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddd1c9119e68d022ae45381f5095ba7c
https://doi.org/10.1007/s11244-018-1079-y
https://doi.org/10.1007/s11244-018-1079-y
Autor:
Alfons Baiker, Jan-Dierk Grunwaldt, Stephan Eckhoff, Ulrich Dr. Göbel, Meike Wittrock, Marek Maciejewski, Maria Casapu
The thermal ageing and reactivation of Ba/CeO2 and Ba/Al2O3 based NO x -storage/ reduction (NSR) catalysts was studied on model catalysts and catalyst systems at the engine. The mixed oxides BaAl2O4 and BaCeO3, which lower the storage activity, are f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e39d1eb93c9fffea6c526cdede73b724
http://doc.rero.ch/record/310558/files/11244_2007_Article_0141.pdf
http://doc.rero.ch/record/310558/files/11244_2007_Article_0141.pdf
Publikováno v:
17. Internationales Stuttgarter Symposium ISBN: 9783658169879
Despite stricter legislative emission targets, the provisions on nitrous oxides and fine particles are partially violated severely in European cities. Thus, comprehensive regulations are being prepared including the validation of vehicle emissions in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a37ce6310099511591860c214091647
https://doi.org/10.1007/978-3-658-16988-6_91
https://doi.org/10.1007/978-3-658-16988-6_91
Publikováno v:
MTZ worldwide. 69:22-27
Lean NOx trap (LNT) systems are currently being improved in order to comply with the more stringent Tier 2 Bin 5 standards. Improving the LNT’s durability is key in this endeavour. The main two aging mechanisms that need to be addressed are thermal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bdd65d51c6f114f452f7174eba3b7a1
https://doi.org/10.1007/bf03226894
https://doi.org/10.1007/bf03226894
Autor:
Ulrich Dr. Göbel, Jan-Dierk Grunwaldt, Maria Casapu, Stephan Eckhoff, Marek Maciejewski, Alfons Baiker, Meike Wittrock
Publikováno v:
Journal of Catalysis. 251:28-38
The behavior of Pt during aging of Pt/Ba/CeO 2 and Pt/Ba/Al 2 O 3 NO x storage-reduction catalysts (NSR) was studied using model catalysts with high and low Pt loadings. Pt composite formation, due to the possible reaction between BaO and platinum ox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efdf1a5a91d0df747b094897911bdc9d
https://doi.org/10.1016/j.jcat.2007.07.019
https://doi.org/10.1016/j.jcat.2007.07.019
Autor:
Herbert Vogel, Ulrich Dr. Göbel, Alfons Drochner, Wolfgang Müller, Susanne Philipp, M. O. Symalla
Publikováno v:
Topics in Catalysis. :199-202
The storage of NO, NO/O2-mixtures and NO2 on CeO2 and BaO/CeO2 was investigated by in situ DRIFT-spectroscopy. The NOx-storage capacity, as well as the kinetic and the mechanism of the NOx-storage process are influenced by the temperature and the BaO
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a039876ee72e878ce69a14a6f81d3c98
https://doi.org/10.1007/s11244-007-0178-y
https://doi.org/10.1007/s11244-007-0178-y
Publikováno v:
Proceedings ISBN: 9783658088439
The ongoing electrification of Diesel powertrains along with the introduction of new test procedures by the European Union creates new challenges for the development of the next generation of exhaust gas aftertreatment systems. The electrification le
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b15462e564c09c57d76432b2b618c2dd
https://doi.org/10.1007/978-3-658-08844-6_67
https://doi.org/10.1007/978-3-658-08844-6_67
Publikováno v:
Topics in Catalysis. :135-142
Investigations of the aging behavior induced by high temperatures coupled with oxidizing atmosphere of model NOx storage systems Ba/Al2O3 and Ba/CeO2 are reported in this paper. The samples were prepared, calcined and exposed to temperatures between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afa049fbd5b8b9c323daa468cfff9556
https://doi.org/10.1023/b:toca.0000029741.48852.e0
https://doi.org/10.1023/b:toca.0000029741.48852.e0
Publikováno v:
Topics in Catalysis. :181-186
Three different Ir catalysts supported on H-ZSM-5 were prepared and tested for the selective catalytic reduction of NO under net oxidizing conditions using propene as reducing agent. The preparation of highly active Ir catalysts and the elaboration o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b4745ee2ea73ab02ddc525c58a60a69
https://doi.org/10.1023/a:1016663721607
https://doi.org/10.1023/a:1016663721607
Autor:
Wilfried Müller, Thomas Kreuzer, Patrick Gélin, P. Kattwinkel, Ulrich Dr. Göbel, Susanne Philipp, Friedemann Rohr
Publikováno v:
Applied Catalysis B: Environmental
Applied Catalysis B: Environmental, Elsevier, 2007, 70, pp.189-197. ⟨10.1016/j.apcatb.2005.12.033⟩
Applied Catalysis B: Environmental, Elsevier, 2007, 70, pp.189-197. ⟨10.1016/j.apcatb.2005.12.033⟩
International audience; Abstract A commercial NOx-storage catalyst (NSC) has been subjected to different aging procedures on the engine bench simulating 100,000 km mileage. The aging consisted of cyclical sulfur exposure, subsequent sulfur removal an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e5396b2a46744600d1dc35503f524a7
https://hal.archives-ouvertes.fr/hal-00179520
https://hal.archives-ouvertes.fr/hal-00179520