Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons

This work aims at evaluating the effect of the catalytic support sorption capacity on the hydrodechlorination (HDC) process. Carbide-derived carbons (CDCs) have been selected for such goal as their high purity and tunable pore structure makes them a suitable carbon model material. CDCs were synthesi...

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Detalles Bibliográficos
Autores: Munoz, M., Zhang, G.-R., Etzold, B.J.M.
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/675878
Acceso en línea:http://hdl.handle.net/10486/675878
https://dx.doi.org/10.1016/j.apcatb.2016.10.062
Access Level:acceso abierto
Palabra clave:4-Chlorophenol
Adsorption
Carbide-derived carbon
Catalytic hydrodechlorination
Pd
Química
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spelling Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbonsMunoz, M.Zhang, G.-R.Etzold, B.J.M.4-ChlorophenolAdsorptionCarbide-derived carbonCatalytic hydrodechlorinationPdQuímicaThis work aims at evaluating the effect of the catalytic support sorption capacity on the hydrodechlorination (HDC) process. Carbide-derived carbons (CDCs) have been selected for such goal as their high purity and tunable pore structure makes them a suitable carbon model material. CDCs were synthesized from TiC by chlorination at different extraction temperatures (800–1300 °C) in order to selectively modify their pore structure and crystallinity. Afterwards, the catalysts were produced using a three step process of sulfuric acid treatment, ion-adsorption of palladium precursor and gas phase reduction. Pd/TiC-CDC (1% wt.) catalysts were tested in the HDC of 4-chlorophenol (4-CP) in both aqueous and organic phases under ambient conditions (30 °C, 1 atm, [4-CP]0 = 2.9 mmol L−1, [Pd-TiC-CDC] = 1 g L−1, 50 N mL H2 min−1). The experimental results were successfully fitted by an expanded kinetic model which accounts for consecutive reaction and sorption processes in parallel, allowing to deduce true HDC kinetic constants. The sorption capacity of the support was found to determine the HDC rates in aqueous phase. In this sense, those catalysts showing the highest surface areas and lowered ordered structures led to higher HDC rates, confirming that a high surface density of 4-CP onto the catalyst surface enhances significantly the HDC reaction. The optimum catalyst (Pd/TiC-CDC-1000) led to the complete conversion of 4-CP in 15 min at a HDC rate of 4.1 × 10−2 L s−1 gcat −1The authors gratefully acknowledge the funding of the German Research Council (DFG), which within the framework of its “Excellence Initiative” supports the Cluster of Excellence “Engineering of Advanced Materials” (www.eam.fau.de) at the University of Erlangen-NurembergElsevierDepartamento de Química Física AplicadaFacultad de Ciencias20172017-04-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/675878https://dx.doi.org/10.1016/j.apcatb.2016.10.062reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6758782026-06-23T12:46:27Z
dc.title.none.fl_str_mv Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
title Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
spellingShingle Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
Munoz, M.
4-Chlorophenol
Adsorption
Carbide-derived carbon
Catalytic hydrodechlorination
Pd
Química
title_short Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
title_full Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
title_fullStr Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
title_full_unstemmed Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
title_sort Exploring the role of the catalytic support sorption capacity on the hydrodechlorination kinetics by the use of carbide-derived carbons
dc.creator.none.fl_str_mv Munoz, M.
Zhang, G.-R.
Etzold, B.J.M.
author Munoz, M.
author_facet Munoz, M.
Zhang, G.-R.
Etzold, B.J.M.
author_role author
author2 Zhang, G.-R.
Etzold, B.J.M.
author2_role author
author
dc.contributor.none.fl_str_mv Departamento de Química Física Aplicada
Facultad de Ciencias
dc.subject.none.fl_str_mv 4-Chlorophenol
Adsorption
Carbide-derived carbon
Catalytic hydrodechlorination
Pd
Química
topic 4-Chlorophenol
Adsorption
Carbide-derived carbon
Catalytic hydrodechlorination
Pd
Química
description This work aims at evaluating the effect of the catalytic support sorption capacity on the hydrodechlorination (HDC) process. Carbide-derived carbons (CDCs) have been selected for such goal as their high purity and tunable pore structure makes them a suitable carbon model material. CDCs were synthesized from TiC by chlorination at different extraction temperatures (800–1300 °C) in order to selectively modify their pore structure and crystallinity. Afterwards, the catalysts were produced using a three step process of sulfuric acid treatment, ion-adsorption of palladium precursor and gas phase reduction. Pd/TiC-CDC (1% wt.) catalysts were tested in the HDC of 4-chlorophenol (4-CP) in both aqueous and organic phases under ambient conditions (30 °C, 1 atm, [4-CP]0 = 2.9 mmol L−1, [Pd-TiC-CDC] = 1 g L−1, 50 N mL H2 min−1). The experimental results were successfully fitted by an expanded kinetic model which accounts for consecutive reaction and sorption processes in parallel, allowing to deduce true HDC kinetic constants. The sorption capacity of the support was found to determine the HDC rates in aqueous phase. In this sense, those catalysts showing the highest surface areas and lowered ordered structures led to higher HDC rates, confirming that a high surface density of 4-CP onto the catalyst surface enhances significantly the HDC reaction. The optimum catalyst (Pd/TiC-CDC-1000) led to the complete conversion of 4-CP in 15 min at a HDC rate of 4.1 × 10−2 L s−1 gcat −1
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-04-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/675878
https://dx.doi.org/10.1016/j.apcatb.2016.10.062
url http://hdl.handle.net/10486/675878
https://dx.doi.org/10.1016/j.apcatb.2016.10.062
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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