Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts

Autores
Diez, Veronica Karina; Apesteguia, Carlos Rodolfo; Di Cosimo, Juana Isabel
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Base-catalyzed elimination reactions were studied on MgO and alkali-modified MgO catalysts using 2-propanol as a probe reactant. The effect of the acid–base properties on the catalyst activity and selectivity was investigated by modifying the surface properties of MgO with 1 mol% of alkaline metals. Group IA metals promote the formation of medium- and high-strength basic sites, thereby increasing the basic site density and strength. The addition of alkaline promoters improves the MgO activity for 2-propanol conversion reactions. The selectivity toward dehydration or dehydrogenation products depends on the base site nature, so that intermediate-strength base sites promote acetone formation, whereas high-strength base sites selectively yield propylene. 2-Ppropanol decomposition to acetone and propylene is proposed to take place via an E1cB mechanism in two parallel pathways sharing a common 2-propoxy intermediate.
Fil: Diez, Veronica Karina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Materia
2-Propanol
Elimination Reactions
Base Catalysis
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/37074
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalystsDiez, Veronica KarinaApesteguia, Carlos RodolfoDi Cosimo, Juana Isabel2-PropanolElimination ReactionsBase Catalysishttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Base-catalyzed elimination reactions were studied on MgO and alkali-modified MgO catalysts using 2-propanol as a probe reactant. The effect of the acid–base properties on the catalyst activity and selectivity was investigated by modifying the surface properties of MgO with 1 mol% of alkaline metals. Group IA metals promote the formation of medium- and high-strength basic sites, thereby increasing the basic site density and strength. The addition of alkaline promoters improves the MgO activity for 2-propanol conversion reactions. The selectivity toward dehydration or dehydrogenation products depends on the base site nature, so that intermediate-strength base sites promote acetone formation, whereas high-strength base sites selectively yield propylene. 2-Ppropanol decomposition to acetone and propylene is proposed to take place via an E1cB mechanism in two parallel pathways sharing a common 2-propoxy intermediate.Fil: Diez, Veronica Karina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaElsevier Science2000-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37074Diez, Veronica Karina; Apesteguia, Carlos Rodolfo; Di Cosimo, Juana Isabel; Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts; Elsevier Science; Catalysis Today; 63; 1; 12-2000; 53-620920-5861CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/S0920-5861(00)00445-4info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0920586100004454info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:11:35Zoai:ri.conicet.gov.ar:11336/37074instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:11:36.243CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
title Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
spellingShingle Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
Diez, Veronica Karina
2-Propanol
Elimination Reactions
Base Catalysis
title_short Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
title_full Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
title_fullStr Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
title_full_unstemmed Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
title_sort Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts
dc.creator.none.fl_str_mv Diez, Veronica Karina
Apesteguia, Carlos Rodolfo
Di Cosimo, Juana Isabel
author Diez, Veronica Karina
author_facet Diez, Veronica Karina
Apesteguia, Carlos Rodolfo
Di Cosimo, Juana Isabel
author_role author
author2 Apesteguia, Carlos Rodolfo
Di Cosimo, Juana Isabel
author2_role author
author
dc.subject.none.fl_str_mv 2-Propanol
Elimination Reactions
Base Catalysis
topic 2-Propanol
Elimination Reactions
Base Catalysis
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Base-catalyzed elimination reactions were studied on MgO and alkali-modified MgO catalysts using 2-propanol as a probe reactant. The effect of the acid–base properties on the catalyst activity and selectivity was investigated by modifying the surface properties of MgO with 1 mol% of alkaline metals. Group IA metals promote the formation of medium- and high-strength basic sites, thereby increasing the basic site density and strength. The addition of alkaline promoters improves the MgO activity for 2-propanol conversion reactions. The selectivity toward dehydration or dehydrogenation products depends on the base site nature, so that intermediate-strength base sites promote acetone formation, whereas high-strength base sites selectively yield propylene. 2-Ppropanol decomposition to acetone and propylene is proposed to take place via an E1cB mechanism in two parallel pathways sharing a common 2-propoxy intermediate.
Fil: Diez, Veronica Karina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Apesteguia, Carlos Rodolfo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Di Cosimo, Juana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
description Base-catalyzed elimination reactions were studied on MgO and alkali-modified MgO catalysts using 2-propanol as a probe reactant. The effect of the acid–base properties on the catalyst activity and selectivity was investigated by modifying the surface properties of MgO with 1 mol% of alkaline metals. Group IA metals promote the formation of medium- and high-strength basic sites, thereby increasing the basic site density and strength. The addition of alkaline promoters improves the MgO activity for 2-propanol conversion reactions. The selectivity toward dehydration or dehydrogenation products depends on the base site nature, so that intermediate-strength base sites promote acetone formation, whereas high-strength base sites selectively yield propylene. 2-Ppropanol decomposition to acetone and propylene is proposed to take place via an E1cB mechanism in two parallel pathways sharing a common 2-propoxy intermediate.
publishDate 2000
dc.date.none.fl_str_mv 2000-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/37074
Diez, Veronica Karina; Apesteguia, Carlos Rodolfo; Di Cosimo, Juana Isabel; Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts; Elsevier Science; Catalysis Today; 63; 1; 12-2000; 53-62
0920-5861
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37074
identifier_str_mv Diez, Veronica Karina; Apesteguia, Carlos Rodolfo; Di Cosimo, Juana Isabel; Acid-base properties and active site requirements for elimination reactions on alkali-promoted MgO catalysts; Elsevier Science; Catalysis Today; 63; 1; 12-2000; 53-62
0920-5861
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/S0920-5861(00)00445-4
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0920586100004454
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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