Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship

This study analyzes the influence of chemical and physical properties of Pd/C and Pt/C hydrodechlorination (HDC) catalysts in the different evolution of their activity during time on stream. Pt/C showed stable activity in the HDC of dichloromethane (DCM) and chloroform (TCM), while Pd/C was deactiva...

Descripción completa

Detalles Bibliográficos
Autores: Martin-Martinez, M., Álvarez Montero, Ariadna, Gómez Sainero, Luisa María, Baker, R. T., Palomar Herrero, José Francisco, Omar, Salama, Eser, S., Rodríguez Jiménez, Juan José
Tipo de recurso: artículo
Fecha de publicación:2015
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/675404
Acceso en línea:http://hdl.handle.net/10486/675404
https://dx.doi.org/10.1016/j.apcatb.2014.07.017
Access Level:acceso abierto
Palabra clave:Chloromethanes
Deactivation
Hydrodechlorination
Pd/C
Pt/C
Química
id ES_983517c515d0fa645b2fff86d8e2ee9c
oai_identifier_str oai:repositorio.uam.es:10486/675404
network_acronym_str ES
network_name_str España
repository_id_str
spelling Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationshipMartin-Martinez, M.Álvarez Montero, AriadnaGómez Sainero, Luisa MaríaBaker, R. T.Palomar Herrero, José FranciscoOmar, SalamaEser, S.Rodríguez Jiménez, Juan JoséChloromethanesDeactivationHydrodechlorinationPd/CPt/CQuímicaThis study analyzes the influence of chemical and physical properties of Pd/C and Pt/C hydrodechlorination (HDC) catalysts in the different evolution of their activity during time on stream. Pt/C showed stable activity in the HDC of dichloromethane (DCM) and chloroform (TCM), while Pd/C was deactivated after 90h of operation, particularly during HDC of DCM. The deactivation of Pd/C catalyst can be attributed to the lower proportion of zero-valent species and larger metal particle size. This appears to hinder the H2 dissociation, enhance the irreversible chemisorption of reactants and reaction products, and favor coupling reactions (leading to the formation of carbonaceous deposits) and/or metal phase change reactions. The more extensive deactivation of Pd/C in the HDC of DCM is attributed to the stronger chemisorption of the reactant on the catalyst, which leads to the formation of a new PdCx phase by the incorporation of carbon atoms into the metal latticeThe authors gratefully acknowledge financial support from the Spanish Ministerio de Economía y Competitividad (MINECO) through the project CTM2011-28352Elsevier B.V.Departamento de Ingeniería QuímicaFacultad de CienciasUAM. Departamento de Ingeniería Química20152015-01-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/675404https://dx.doi.org/10.1016/j.apcatb.2014.07.017reponame: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:10486/6754042026-06-23T12:46:27Z
dc.title.none.fl_str_mv Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
title Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
spellingShingle Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
Martin-Martinez, M.
Chloromethanes
Deactivation
Hydrodechlorination
Pd/C
Pt/C
Química
title_short Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
title_full Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
title_fullStr Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
title_full_unstemmed Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
title_sort Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure-reactivity relationship
dc.creator.none.fl_str_mv Martin-Martinez, M.
Álvarez Montero, Ariadna
Gómez Sainero, Luisa María
Baker, R. T.
Palomar Herrero, José Francisco
Omar, Salama
Eser, S.
Rodríguez Jiménez, Juan José
author Martin-Martinez, M.
author_facet Martin-Martinez, M.
Álvarez Montero, Ariadna
Gómez Sainero, Luisa María
Baker, R. T.
Palomar Herrero, José Francisco
Omar, Salama
Eser, S.
Rodríguez Jiménez, Juan José
author_role author
author2 Álvarez Montero, Ariadna
Gómez Sainero, Luisa María
Baker, R. T.
Palomar Herrero, José Francisco
Omar, Salama
Eser, S.
Rodríguez Jiménez, Juan José
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Química
Facultad de Ciencias
UAM. Departamento de Ingeniería Química
dc.subject.none.fl_str_mv Chloromethanes
Deactivation
Hydrodechlorination
Pd/C
Pt/C
Química
topic Chloromethanes
Deactivation
Hydrodechlorination
Pd/C
Pt/C
Química
description This study analyzes the influence of chemical and physical properties of Pd/C and Pt/C hydrodechlorination (HDC) catalysts in the different evolution of their activity during time on stream. Pt/C showed stable activity in the HDC of dichloromethane (DCM) and chloroform (TCM), while Pd/C was deactivated after 90h of operation, particularly during HDC of DCM. The deactivation of Pd/C catalyst can be attributed to the lower proportion of zero-valent species and larger metal particle size. This appears to hinder the H2 dissociation, enhance the irreversible chemisorption of reactants and reaction products, and favor coupling reactions (leading to the formation of carbonaceous deposits) and/or metal phase change reactions. The more extensive deactivation of Pd/C in the HDC of DCM is attributed to the stronger chemisorption of the reactant on the catalyst, which leads to the formation of a new PdCx phase by the incorporation of carbon atoms into the metal lattice
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/675404
https://dx.doi.org/10.1016/j.apcatb.2014.07.017
url http://hdl.handle.net/10486/675404
https://dx.doi.org/10.1016/j.apcatb.2014.07.017
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 B.V.
publisher.none.fl_str_mv Elsevier B.V.
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
_version_ 1869414174823546880
score 15,300719

Similares en LA Referencia