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dc.contributor.author
Miranda M., Cristian David
dc.contributor.author
Ramírez, Alfonso E.
dc.contributor.author
Gaona Jurado, Sonia
dc.contributor.author
Vera, Carlos Roman
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dc.date.available
2017-12-26T20:55:45Z
dc.date.issued
2014-12
dc.identifier.citation
Ramírez, Alfonso E.; Gaona Jurado, Sonia; Miranda M., Cristian David; Vera, Carlos Roman; Superficial effects and catalytic activity of ZrO2–SO42− as a function of the crystal structure; Elsevier; Journal of Molecular Catalysis A: Chemical; 398; 12-2014; 325-335
dc.identifier.issn
1381-1169
dc.identifier.uri
http://hdl.handle.net/11336/31605
dc.description.abstract
As assessment was made of the influence of the crystal structure on the activity of SO42−–ZrO2 catalysts for the acid-catalyzed reactions of sucrose inversion and the esterification of fatty acids with glycerol. Purely monoclinic or purely tetragonal SO42−–ZrO2 catalysts were synthesized by sulfation with 1 M sulfuric acid of different ZrO2 starting materials of defined crystal phase. The final catalysts were obtained by calcination at 400 °C, a relatively mild temperature for this kind of materials. Structural and morphological characterization tests showed that the crystal phase of zirconia had an influence on the properties of the sulfated zirconia catalysts. Monoclinic and tetragonal catalysts had different acidities and also different levels of activity in the reactions. Better results in the sucrose inversion tests were obtained using tetragonal phase catalysts while monoclinic phase materials were better catalysts for glycerol esterification. The catalysts were further characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and nitrogen physisorption. The acidity was measured by amine titration using Hammett indicators and FT-IR absorption of adsorbed pyridine.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Zirconium Oxide
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Sulfated Zirconia
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Sucrose Inversion
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Acid Catalysis
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Glycerol Esterification
dc.subject.classification
Otras Ingeniería Química
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dc.subject.classification
Ingeniería Química
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Superficial effects and catalytic activity of ZrO2–SO42− as a function of the crystal structure
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-12-26T19:50:15Z
dc.journal.volume
398
dc.journal.pagination
325-335
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Ámsterdam
dc.description.fil
Fil: Miranda M., Cristian David. Universidad del Cauca; Colombia
dc.description.fil
Fil: Ramírez, Alfonso E.. Universidad del Cauca; Colombia
dc.description.fil
Fil: Gaona Jurado, Sonia. Universidad del Cauca; Colombia
dc.description.fil
Fil: Vera, Carlos Roman. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
dc.journal.title
Journal of Molecular Catalysis A: Chemical
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1381116914005755
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.molcata.2014.12.015
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