dc.contributor.author | Pena, Diego | |
dc.contributor.author | Cognigni, Andrea | |
dc.contributor.author | Neumayer, Thomas | |
dc.contributor.author | Van Beek, Wouter | |
dc.contributor.author | Jones, Debra | |
dc.contributor.author | Quijada, Melesio | |
dc.contributor.author | Rønning, Magnus | |
dc.date.accessioned | 2018-02-07T07:58:07Z | |
dc.date.available | 2018-02-07T07:58:07Z | |
dc.date.created | 2018-02-06T11:22:04Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Applied Catalysis A : General. 2018, 554 10-23. | nb_NO |
dc.identifier.issn | 0926-860X | |
dc.identifier.uri | http://hdl.handle.net/11250/2483113 | |
dc.description.abstract | This paper focuses on the use of in situ and ex situ characterisation techniques to provide evidences of carbon species on a commercial iron-based Fischer-Tropsch synthesis catalyst as well as other indices of potential deactivation mechanisms. In situ XANES measurements demonstrate that re-oxidation or transformation of the active iron phase, i.e. the Hägg carbide phase, was not a significant deactivation mechanism at the studied conditions. Sintering of Hägg carbide nanoparticles is significant with increasing temperatures and time on stream. The sintering mechanism is proposed to be a hydrothermally-assisted process. In situ DRIFTS indicates the presence of different carbon species on the catalyst surface such as aliphatic hydrocarbons from wax products and oxygenate compounds such as alcohols, aldehydes/ketones and carboxylate species. Carboxylate species are resistant towards hydrogenation at 280 °C. The presence of different carbon species on the surface after wax product extraction is evident from TPH-MS measurements. GC-MS analysis shows that the strongly adsorbed carbon species remaining on the catalyst surface from wax products are mainly α-olefins and branched carboxylic species. The interaction of oxygenate compounds, especially carboxylate species with iron oxide, may form stable complexes limiting further iron catalyst carburization. STEM-EDX analysis shows that carbon is preferentially located on iron particles. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Identification of carbon species on iron-based catalysts during Fischer-Tropsch synthesis | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 10-23 | nb_NO |
dc.source.volume | 554 | nb_NO |
dc.source.journal | Applied Catalysis A : General | nb_NO |
dc.identifier.doi | https://doi.org/10.1016/j.apcata.2018.01.019 | |
dc.identifier.cristin | 1562323 | |
dc.relation.project | EC/FP7/604277 | nb_NO |
dc.relation.project | Norges forskningsråd: 197405 | nb_NO |
dc.relation.project | Norges forskningsråd: 218406 | nb_NO |
dc.description.localcode | © 2018. This is the authors’ accepted and refereed manuscript to the article. Locked until 4.2.2020 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,66,30,0 | |
cristin.unitname | Institutt for kjemisk prosessteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |