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dc.contributor.authorPereira, Amalia Luz C.-
dc.contributor.authorBerrocal, Guillermo José Paternina-
dc.contributor.authorMarchetti, Sérgio G.-
dc.contributor.authorAlbornoz, Alberto-
dc.contributor.authorSouza, Alexilda Oliveira de-
dc.contributor.authorVarela, Maria do Carmo Rangel Santos-
dc.creatorPereira, Amalia Luz C.-
dc.creatorBerrocal, Guillermo José Paternina-
dc.creatorMarchetti, Sérgio G.-
dc.creatorAlbornoz, Alberto-
dc.creatorSouza, Alexilda Oliveira de-
dc.creatorVarela, Maria do Carmo Rangel Santos-
dc.date.accessioned2012-07-06T14:08:00Z-
dc.date.issued2008-
dc.identifier.issn1381-1169-
dc.identifier.urihttp://www.repositorio.ufba.br/ri/handle/ri/6359-
dc.descriptionAcesso restrito: Texto completo. p. 66-72pt_BR
dc.description.abstractThe precipitation and impregnation methods in the preparation of chromium-doped magnetite for water gas shift reaction (WGSR) were compared in this work. This reaction is an important step in the commercial production of highly pure hydrogen from natural gas or naphtha feedstocks. It was found that the preparation method affects both the textural and catalytic properties of chromium-doped magnetite. However, chromium was able to preserve the specific surface area during the WGSR and to delay the metallic iron production, independently of the preparation method. Chromium caused a decrease in activity per area, depending on the preparation method. This fact was assigned to its ability in making the production of Fe2+ species more difficult, making the catalytic sites less active, because the redox cycle of the reaction becomes more difficult. The most active catalyst was obtained by adding chromium by impregnation, which led to a large amount of total chromium in the solid and then a catalyst with high specific surface area was produced. It was showed that the catalysts can be prepared in the active phase avoiding the reduction step, before reaction.pt_BR
dc.language.isoenpt_BR
dc.sourcehttp://dx.doi.org/10.1016/j.molcata.2007.07.042pt_BR
dc.subjectChromium-doped magnetitept_BR
dc.subjectHydrogenpt_BR
dc.subjectWGSRpt_BR
dc.titleA comparison between the precipitation and impregnation methods for water gas shift catalystspt_BR
dc.title.alternativeJournal of Molecular Catalysis A-Chemicalpt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 281, n. 1-2pt_BR
dc.embargo.liftdate10000-01-01-
Appears in Collections:Artigo Publicado em Periódico (Química)

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