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dc.contributor.authorPendyala, Venkat Ramana Rao
dc.contributor.authorGraham, Uschi M.
dc.contributor.authorJacobs, Gary
dc.contributor.authorHamdeh, Hussein H.
dc.contributor.authorDavis, Burtron H.
dc.date.accessioned2014-10-30T17:57:35Z
dc.date.available2014-10-30T17:57:35Z
dc.date.issued2014-07
dc.identifier.citationPendyala, V. R. R., Graham, U. M., Jacobs, G., Hamdeh, H. H. and Davis, B. H. (2014), Fischer–Tropsch Synthesis: Morphology, Phase Transformation, and Carbon-Layer Growth of Iron-Based Catalysts. ChemCatChem, vol. 6:no. 7:pp 1952–1960. doi: 10.1002/cctc.201402073en_US
dc.identifier.issn1867-3880
dc.identifier.otherWOS:000340573200019
dc.identifier.urihttp://dx.doi.org/10.1002/cctc.201402073
dc.identifier.urihttp://hdl.handle.net/10057/10864
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThe morphological, phase transformations and carbon-layer growth for unpromoted and K-promoted iron catalysts were investigated over time during Fischer-Tropsch synthesis. Catalysts were activated in CO for 24 h, which transformed hematite into a mixture containing 93% iron carbide and 7% magnetite for the unpromoted catalyst and 81% iron carbide and 19% magnetite for the K-promoted catalyst. Initially, the activated catalysts had high CO conversions (approximate to 85%); however, the conversions decreased to approximately 30% after approximately 280 h of synthesis time. For the unpromoted catalyst, the amount of iron carbide gradually decreased over time while the corresponding magnetite phase increased. However, for the K-promoted one, only one iron carbide phase (X-Fe5C2) gradually decreased, while the other (epsilon-Fe2.2C) phase steadily increased and magnetite remained unchanged. TEM analyses revealed that for the K-promoted catalyst, carbon deposition increased over time, unlike that of the unpromoted catalyst.en_US
dc.description.sponsorshipUniversity of Wyoming contract number 1001541-Davis and the Commonwealth of Kentucky.en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sons, Inc.en_US
dc.relation.ispartofseriesChemCatChem;v.6:no.7
dc.subjectCarbidesen_US
dc.subjectHydrogenationen_US
dc.subjectIronen_US
dc.subjectMossbauer spectroscopyen_US
dc.subjectPotassiumen_US
dc.titleFischer-Tropsch synthesis: morphology, phase transformation, and carbon-layer growth of iron-based catalystsen_US
dc.typeArticleen_US
dc.rights.holder© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


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