Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons

The effect of different heating mechanisms on the porous network of activated carbons (AC) previously exhausted with phenol has been studied. To this end, thermal treatment of the exhausted AC was performed using two experimental devices: a single mode microwave device operating at 2450 MHz and a co...

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Autores: Ovín Ania, María Concepción, Parra Soto, José Bernardo, Menéndez Díaz, José Ángel, Pis Martínez, José Juan
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2005
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/98838
Acceso en línea:http://hdl.handle.net/10261/98838
Access Level:acceso abierto
Palabra clave:Activated carbon
Thermal regeneration
Microwave energy
Phenol adsorption
Carbon deposits
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spelling Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbonsOvín Ania, María ConcepciónParra Soto, José BernardoMenéndez Díaz, José ÁngelPis Martínez, José JuanActivated carbonThermal regenerationMicrowave energyPhenol adsorptionCarbon depositsThe effect of different heating mechanisms on the porous network of activated carbons (AC) previously exhausted with phenol has been studied. To this end, thermal treatment of the exhausted AC was performed using two experimental devices: a single mode microwave device operating at 2450 MHz and a conventional electric furnace. By employing microwave energy, the regeneration time was considerably shortened compared to conventional thermal heating. Moreover, microwave heating preserved the porous structure of the regenerated AC more efficiently than treatment in a conventional device. In both cases successive regeneration cycles reduced the microporosity of the activated carbons. However, conventional heating shifted the micropore size distribution to pores of narrower sizes. The apparent BET surface areas were also reduced significantly over the regeneration cycles. A loss of the adsorptive capacity of the carbon material was observed after six adsorption–desorption cycles in both systems. The phenol adsorption capacities decreased to a greater extent in the samples regenerated in the electric furnace.Work carried out with a financial grant from the European Coal and Steel Community (Project 7220-PR-139). The authors wish to thank Dr. Martín-Gullón for his considerate and helpful assistance with the software tool used for the DRS calculation.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201420142005info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/98838reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.micromeso.2005.06.013Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/988382026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
title Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
spellingShingle Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
Ovín Ania, María Concepción
Activated carbon
Thermal regeneration
Microwave energy
Phenol adsorption
Carbon deposits
title_short Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
title_full Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
title_fullStr Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
title_full_unstemmed Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
title_sort Effect of microwave and conventional regeneration on the microporous and mesoporous network and on the adsorptive capacity of activated carbons
dc.creator.none.fl_str_mv Ovín Ania, María Concepción
Parra Soto, José Bernardo
Menéndez Díaz, José Ángel
Pis Martínez, José Juan
author Ovín Ania, María Concepción
author_facet Ovín Ania, María Concepción
Parra Soto, José Bernardo
Menéndez Díaz, José Ángel
Pis Martínez, José Juan
author_role author
author2 Parra Soto, José Bernardo
Menéndez Díaz, José Ángel
Pis Martínez, José Juan
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Activated carbon
Thermal regeneration
Microwave energy
Phenol adsorption
Carbon deposits
topic Activated carbon
Thermal regeneration
Microwave energy
Phenol adsorption
Carbon deposits
description The effect of different heating mechanisms on the porous network of activated carbons (AC) previously exhausted with phenol has been studied. To this end, thermal treatment of the exhausted AC was performed using two experimental devices: a single mode microwave device operating at 2450 MHz and a conventional electric furnace. By employing microwave energy, the regeneration time was considerably shortened compared to conventional thermal heating. Moreover, microwave heating preserved the porous structure of the regenerated AC more efficiently than treatment in a conventional device. In both cases successive regeneration cycles reduced the microporosity of the activated carbons. However, conventional heating shifted the micropore size distribution to pores of narrower sizes. The apparent BET surface areas were also reduced significantly over the regeneration cycles. A loss of the adsorptive capacity of the carbon material was observed after six adsorption–desorption cycles in both systems. The phenol adsorption capacities decreased to a greater extent in the samples regenerated in the electric furnace.
publishDate 2005
dc.date.none.fl_str_mv 2005
2014
2014
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/10261/98838
url http://hdl.handle.net/10261/98838
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.micromeso.2005.06.013
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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