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dc.contributor.author
Gutierrez, Laura Beatriz  
dc.contributor.author
Miro, Eduardo Ernesto  
dc.contributor.author
Irusta, S.  
dc.date.available
2018-11-26T16:08:06Z  
dc.date.issued
2008-09  
dc.identifier.citation
Gutierrez, Laura Beatriz; Miro, Eduardo Ernesto; Irusta, S.; Spectroscopic and catalytic characterization of Co-exchanged mordenites subject to CO/O2 redox treatments; Elsevier Science; Microporous and Mesoporous Materials; 114; 1-3; 9-2008; 281-292  
dc.identifier.issn
1387-1811  
dc.identifier.uri
http://hdl.handle.net/11336/65154  
dc.description.abstract
Co-mordenites were prepared by ion exchange and wet impregnation over Na-mordenite and H-mordenite. The prepared solids were calcined and aliquots of these samples were subject to redox treatments first with CO for 2 h at 773 K and then kept 2 h at the same temperature in flowing O2. A thorough characterization of the solids was carried out by TPR, XPS, CO volumetric adsorption, and FTIR with CO, NO and pyridine adsorption as probe molecules. After the redox treatment, Na based samples showed an important increase in the CO adsorption. TPR and XPS results indicated reduction of the oxides present in the calcined samples and the migration of exchanged cobalt from hidden to more exposed sites was demonstrated by FTIR. The acid catalysts did not change their CO capacity of adsorption; exchanged cobalt ions were mainly in β-type sites and remained in this position after treatment. After the redox treatments, the activity for the selective reduction of NOx with methane suffered a decrease on both types of mordenites, probably caused by the strong adsorption of NO and the reduction of β-type Co2+ to metallic cobalt that would diminish the active sites concentration and also block the channels, thus preventing the access of the reactants.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Co-Mordenites  
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Co-Ftir  
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No-Ftir  
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Py-Ftir  
dc.subject.classification
Otras Ingeniería Química  
dc.subject.classification
Ingeniería Química  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Spectroscopic and catalytic characterization of Co-exchanged mordenites subject to CO/O2 redox treatments  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-11-15T15:58:27Z  
dc.journal.volume
114  
dc.journal.number
1-3  
dc.journal.pagination
281-292  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Gutierrez, Laura Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina  
dc.description.fil
Fil: Miro, Eduardo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; Argentina  
dc.description.fil
Fil: Irusta, S.. Universidad de Zaragoza; España  
dc.journal.title
Microporous and Mesoporous Materials  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.micromeso.2008.01.014