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dc.contributor.author
Marchesini, Fernanda Albana  
dc.contributor.author
Irusta, S.  
dc.contributor.author
Querini, Carlos Alberto  
dc.contributor.author
Miro, Eduardo Ernesto  
dc.date.available
2018-11-26T16:05:08Z  
dc.date.issued
2008-09  
dc.identifier.citation
Marchesini, Fernanda Albana; Irusta, S.; Querini, Carlos Alberto; Miro, Eduardo Ernesto; Spectroscopic and catalytic characterization of Pd-In and Pt-In supported on Al2O3 and SiO2, active catalysts for nitrate hydrogenation; Elsevier Science; Applied Catalysis A: General; 348; 1; 9-2008; 60-70  
dc.identifier.issn
0926-860X  
dc.identifier.uri
http://hdl.handle.net/11336/65153  
dc.description.abstract
Bimetallic Pt-In and Pd-In catalysts supported on alumina or silica were studied for the reduction of nitrate to N2 in water, using H2 as reducing agent. Characterization results indicate that bimetallic particles with the surface enriched in indium, metallic crystals of Pt or Pd, and oxides of Pt or Pd and In2O3 are the main surface species present in the catalysts. Several catalysts studied in this work could fulfill the requirements usually established as limit values: 50 ppm of-NO3-, 0.1 ppm of NO2- and 0.5 ppm of NH4+. The reaction rate is strongly influenced by either the Pt:In or the Pd:In ratio, the optimum being observed at low contents of In. Of all the catalysts studied in this work, Pd(1 wt.%)In(0.25 wt.%)/Al2O3 is the most active one, but unfortunately, it presents an undesirable high selectivity towards ammonia when nitrate conversion reaches 100%. Pt(1.0%)In(0.25%)/Al2O3 presents a high initial activity but it fastly deactivates during reaction. In general, Pd-In catalysts are more active for nitrate conversion than Pt-In, and alumina is a better support than silica. The composition of the catalysts changes both after reduction and after contacting the liquid reaction media. These changes have been observed by XPS and TEM. In general, the samples used in the reaction have lower dispersion of metallic phases than the fresh-calcined ones. For most of the catalysts used in this work, the Pt:In or Pd:In surface ratio is lower than the bulk ones, this probably being the reason for the low amount of In that is sufficient to have an optimal performance for nitrate conversion.  
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
Bimetallic Catalysts  
dc.subject
Catalytic Reduction  
dc.subject
Nitrates  
dc.subject
Nitrites  
dc.subject.classification
Otras Ingeniería Química  
dc.subject.classification
Ingeniería Química  
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Spectroscopic and catalytic characterization of Pd-In and Pt-In supported on Al2O3 and SiO2, active catalysts for nitrate hydrogenation  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-11-15T15:58:24Z  
dc.journal.volume
348  
dc.journal.number
1  
dc.journal.pagination
60-70  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Marchesini, Fernanda Albana. 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.description.fil
Fil: Querini, Carlos Alberto. 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.journal.title
Applied Catalysis A: General  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.apcata.2008.06.026