Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure

PdCuZn/SiC catalysts were synthesized with different Pd:Cu:Zn molar compositions and tested in the hydrogenation of carbon dioxide to methanol at atmospheric pressure. Trimetallic catalysts were compared with the corresponding bimetallic ones (PdZn/SiC, CuZn/SiC and PdCu/SiC). Catalysts were charact...

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Detalles Bibliográficos
Autores: Díez Ramírez, Javier, Sánchez Paredes, Paula, Dorado Fernández, Fernando
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29717
Acceso en línea:http://hdl.handle.net/10578/29717
Access Level:acceso abierto
Palabra clave:CO2 hydrogenation
Methanol synthesis
Trimetallic catalysts
Pd-Cu-Zn
Silicon carbide
Atmospheric pressure
Hidrogenación de CO2
Síntesis de metanol
Catalizadores trimetálicos
Carburo de silicio
Presión atmosférica
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spelling Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressureDíez Ramírez, JavierSánchez Paredes, PaulaDorado Fernández, FernandoCO2 hydrogenationMethanol synthesisTrimetallic catalystsPd-Cu-ZnSilicon carbideAtmospheric pressureHidrogenación de CO2Síntesis de metanolCatalizadores trimetálicosCarburo de silicioPresión atmosféricaPdCuZn/SiC catalysts were synthesized with different Pd:Cu:Zn molar compositions and tested in the hydrogenation of carbon dioxide to methanol at atmospheric pressure. Trimetallic catalysts were compared with the corresponding bimetallic ones (PdZn/SiC, CuZn/SiC and PdCu/SiC). Catalysts were characterized by N2 adsorption/desorption, temperature-programed reduction (TPR), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The Pd0 active sites were related to carbon monoxide formation via reverse water-gas-shift (RWGS), whereas the PdZn alloys catalyzed methanol synthesis. The role of copper in trimetallic catalysts was to inhibit the deposition of metallic palladium by forming a PdCu alloy that proved to be less active to CO formation. Moreover, the active sites of trimetallic catalysts were smaller and better dispersed than those of the corresponding bimetallic ones, probably due to a synergistic effect between the three metals. The catalyst with a molar composition of 37.5:12.5:50 Pd:Cu:Zn (mol.%) was selected as the most active for the methanol synthesis, as this sample showed the highest activity and selectivity to methanol. The role of copper was also shown to be crucial in trimetallic catalyst by comparing the best example with an equivalent bimetallic PdZn/SiC with a Pd:Zn molar ratio of 37.5:62.5.Se sintetizaron catalizadores de PdCuZn/SiC con diferentes composiciones molares de Pd:Cu:Zn y se probaron en la hidrogenación de dióxido de carbono a metanol a presión atmosférica. Se compararon catalizadores trimetálicos con los correspondientes bimetálicos (PdZn/SiC, CuZn/SiC y PdCu/SiC). Los catalizadores se caracterizaron por adsorción/desorción de N 2 , reducción programada por temperatura (TPR), difracción de rayos X (XRD), microscopía electrónica de transmisión (TEM), espectroscopía de rayos X de dispersión de energía (EDS) y espectroscopía de fotoelectrones de rayos X (XPS). ). la pd 0los sitios activos estaban relacionados con la formación de monóxido de carbono a través del cambio inverso de agua y gas (RWGS), mientras que las aleaciones de PdZn catalizaron la síntesis de metanol. El papel del cobre en los catalizadores trimetálicos era inhibir la deposición de paladio metálico formando una aleación de PdCu que demostró ser menos activa para la formación de CO. Además, los sitios activos de los catalizadores trimetálicos eran más pequeños y estaban mejor dispersos que los de los correspondientes bimetálicos, probablemente debido a un efecto sinérgico entre los tres metales. El catalizador con una composición molar de 37,5:12,5:50 Pd:Cu:Zn (mol.%) fue seleccionado como el más activo para la síntesis de metanol, ya que esta muestra mostró la mayor actividad y selectividad al metanol.Elsevier202220222017info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/29717reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/297172026-05-27T07:36:41Z
dc.title.none.fl_str_mv Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
title Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
spellingShingle Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
Díez Ramírez, Javier
CO2 hydrogenation
Methanol synthesis
Trimetallic catalysts
Pd-Cu-Zn
Silicon carbide
Atmospheric pressure
Hidrogenación de CO2
Síntesis de metanol
Catalizadores trimetálicos
Carburo de silicio
Presión atmosférica
title_short Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
title_full Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
title_fullStr Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
title_full_unstemmed Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
title_sort Optimization of the Pd/Cu ratio in Pd-Cu-Zn/SiC catalysts for the CO2 hydrogenation to methanol at atmospheric pressure
dc.creator.none.fl_str_mv Díez Ramírez, Javier
Sánchez Paredes, Paula
Dorado Fernández, Fernando
author Díez Ramírez, Javier
author_facet Díez Ramírez, Javier
Sánchez Paredes, Paula
Dorado Fernández, Fernando
author_role author
author2 Sánchez Paredes, Paula
Dorado Fernández, Fernando
author2_role author
author
dc.subject.none.fl_str_mv CO2 hydrogenation
Methanol synthesis
Trimetallic catalysts
Pd-Cu-Zn
Silicon carbide
Atmospheric pressure
Hidrogenación de CO2
Síntesis de metanol
Catalizadores trimetálicos
Carburo de silicio
Presión atmosférica
topic CO2 hydrogenation
Methanol synthesis
Trimetallic catalysts
Pd-Cu-Zn
Silicon carbide
Atmospheric pressure
Hidrogenación de CO2
Síntesis de metanol
Catalizadores trimetálicos
Carburo de silicio
Presión atmosférica
description PdCuZn/SiC catalysts were synthesized with different Pd:Cu:Zn molar compositions and tested in the hydrogenation of carbon dioxide to methanol at atmospheric pressure. Trimetallic catalysts were compared with the corresponding bimetallic ones (PdZn/SiC, CuZn/SiC and PdCu/SiC). Catalysts were characterized by N2 adsorption/desorption, temperature-programed reduction (TPR), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The Pd0 active sites were related to carbon monoxide formation via reverse water-gas-shift (RWGS), whereas the PdZn alloys catalyzed methanol synthesis. The role of copper in trimetallic catalysts was to inhibit the deposition of metallic palladium by forming a PdCu alloy that proved to be less active to CO formation. Moreover, the active sites of trimetallic catalysts were smaller and better dispersed than those of the corresponding bimetallic ones, probably due to a synergistic effect between the three metals. The catalyst with a molar composition of 37.5:12.5:50 Pd:Cu:Zn (mol.%) was selected as the most active for the methanol synthesis, as this sample showed the highest activity and selectivity to methanol. The role of copper was also shown to be crucial in trimetallic catalyst by comparing the best example with an equivalent bimetallic PdZn/SiC with a Pd:Zn molar ratio of 37.5:62.5.
publishDate 2017
dc.date.none.fl_str_mv 2017
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/29717
url http://hdl.handle.net/10578/29717
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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