Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction

SAPO-34 molecular sieves have been synthesized with different structure directing agents. Although materials with the same framework structure (CHA type) are obtained in all cases, they possess different physicochemical properties, especially textural parameters and crystal size. These catalysts hav...

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Detalles Bibliográficos
Autores: Álvaro-Muñoz, Teresa, Márquez Álvarez, Carlos, Sastre, Enrique
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/121369
Acceso en línea:http://hdl.handle.net/10261/121369
Access Level:acceso abierto
Palabra clave:SAPO-34
Structure directing agents
Methanol-to-olefins
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repository_id_str
spelling Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reactionÁlvaro-Muñoz, TeresaMárquez Álvarez, CarlosSastre, EnriqueSAPO-34Structure directing agentsMethanol-to-olefinsSAPO-34 molecular sieves have been synthesized with different structure directing agents. Although materials with the same framework structure (CHA type) are obtained in all cases, they possess different physicochemical properties, especially textural parameters and crystal size. These catalysts have been tested in the MTO process. All the samples exhibited high activity and selectivity to short chain olefins at the initial stages of the reaction, but they deactivate rapidly with time on stream, especially at high space velocity. It has been observed an important influence of the external surface, crystal size and acidity on the activity, selectivity and lifetime of the different samples. Thus, the sample synthesized with tetraethylammonium hydroxide as structure directing agent rendered the best catalytic performance owing to its higher external surface, smaller crystal size and higher acidity.Spanish Ministry of Science and Innovation: Project MAT2009-13569CSIC for a JAE PhD grantPeer reviewedElsevierMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/121369reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1213692026-05-22T06:33:51Z
dc.title.none.fl_str_mv Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
title Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
spellingShingle Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
Álvaro-Muñoz, Teresa
SAPO-34
Structure directing agents
Methanol-to-olefins
title_short Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
title_full Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
title_fullStr Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
title_full_unstemmed Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
title_sort Use of different templates on SAPO-34 synthesis: effect on the acidity and catalytic activity in the MTO reaction
dc.creator.none.fl_str_mv Álvaro-Muñoz, Teresa
Márquez Álvarez, Carlos
Sastre, Enrique
author Álvaro-Muñoz, Teresa
author_facet Álvaro-Muñoz, Teresa
Márquez Álvarez, Carlos
Sastre, Enrique
author_role author
author2 Márquez Álvarez, Carlos
Sastre, Enrique
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv SAPO-34
Structure directing agents
Methanol-to-olefins
topic SAPO-34
Structure directing agents
Methanol-to-olefins
description SAPO-34 molecular sieves have been synthesized with different structure directing agents. Although materials with the same framework structure (CHA type) are obtained in all cases, they possess different physicochemical properties, especially textural parameters and crystal size. These catalysts have been tested in the MTO process. All the samples exhibited high activity and selectivity to short chain olefins at the initial stages of the reaction, but they deactivate rapidly with time on stream, especially at high space velocity. It has been observed an important influence of the external surface, crystal size and acidity on the activity, selectivity and lifetime of the different samples. Thus, the sample synthesized with tetraethylammonium hydroxide as structure directing agent rendered the best catalytic performance owing to its higher external surface, smaller crystal size and higher acidity.
publishDate 2012
dc.date.none.fl_str_mv 2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/121369
url http://hdl.handle.net/10261/121369
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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