Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15

Acidic heterogeneous catalysts based on the anchorage of sulfonic groups on SBA-15 mesoporous silica were synthesized. In a first synthesis step, samples containing mercapto groups were prepared by co-condensation of tetraethylorthosilicate with 3-mercaptopropyltrimethoxysilane, in presence of ethyl...

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Autores principales:	Basaldella, Elena Isabel, Legnoverde, María Soledad, Jiménez-Morales, Ignacio, Rodríguez-Castellón, Enrique, Dalla Costa, Bruno O., Querini, Carlos A.
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2011
Materias:	Ingeniería Química Mesoporous silica SBA-15 Functionalization Sulfonation Acid catalysts Alkylation Esterification
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/138574
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-138574
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ingeniería Química Mesoporous silica SBA-15 Functionalization Sulfonation Acid catalysts Alkylation Esterification
spellingShingle	Ingeniería Química Mesoporous silica SBA-15 Functionalization Sulfonation Acid catalysts Alkylation Esterification Basaldella, Elena Isabel Legnoverde, María Soledad Jiménez-Morales, Ignacio Rodríguez-Castellón, Enrique Dalla Costa, Bruno O. Querini, Carlos A. Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
topic_facet	Ingeniería Química Mesoporous silica SBA-15 Functionalization Sulfonation Acid catalysts Alkylation Esterification
description	Acidic heterogeneous catalysts based on the anchorage of sulfonic groups on SBA-15 mesoporous silica were synthesized. In a first synthesis step, samples containing mercapto groups were prepared by co-condensation of tetraethylorthosilicate with 3-mercaptopropyltrimethoxysilane, in presence of ethylene-propylene block copolymer as mesoporous silica structure director. In other samples, mercapto groups were introduced by post-functionalization of the traditional calcined SBA-15. In a second step, these mercapto groups were oxidized in order to get sulfonic acid groups on the surface. Characterization of the samples was carried out by N2 adsorption-desorption, FTIR, XPS and acid-base titration. Spectroscopic techniques showed that the effective incorporation of sulfonic groups depends on the synthesis methodology used. In turn, the SBA-15 post-synthesis functionalization produces changes in structural characteristics like a decrease in BET surface and changes in the pore size distribution. The as-prepared materials were tested as acid catalysts in the alkylation of isobutane with 1-butene, and in the esterification of free fatty acids with methanol. The results obtained show a lack of activity in the alkylation reaction which can be associated with the formation and stabilization of the intermediate carbocation species.
format	Articulo Articulo
author	Basaldella, Elena Isabel Legnoverde, María Soledad Jiménez-Morales, Ignacio Rodríguez-Castellón, Enrique Dalla Costa, Bruno O. Querini, Carlos A.
author_facet	Basaldella, Elena Isabel Legnoverde, María Soledad Jiménez-Morales, Ignacio Rodríguez-Castellón, Enrique Dalla Costa, Bruno O. Querini, Carlos A.
author_sort	Basaldella, Elena Isabel
title	Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
title_short	Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
title_full	Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
title_fullStr	Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
title_full_unstemmed	Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15
title_sort	preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized sba-15
publishDate	2011
url	http://sedici.unlp.edu.ar/handle/10915/138574
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bdutipo_str	Repositorios
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Preparation, characterization and catalytic activity towards green reactions of sulfonic functionalized SBA-15

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