A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin

Autores
Mendow, Gustavo; Sánchez, Agustina; Grosso, C.; Querini, Carlos Alberto
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, a Pd-Cu catalyst supported on a macroporous anionexchange resin was used in two novel processes to treat watercontaminated with nitrates. The catalytic performance was evaluated in acontinuous fixed bed reactor. The process (Reaction + Ion Exchange) -Regeneration, named RIE-R, has two steps: 1- reaction and ion exchange(RIE); 2- Regeneration (R). It was found that a hydrogen flow rateincrease does not affect the nitrate conversion during the RIE step,while the selectivity to nitrogen decreased. The presence of competingions (sulphate, bicarbonate, chlorides) led to a decrease in the nitrateconversion. In any case, the water obtained in the process meets thelimits established by the World Health Organization. During theregeneration step, carried out just by bubbling hydrogen to the catalyticbed, 100% of nitrates present in the resin at the end of the RIE cyclewere eliminated.The other process, named IE-R, has a first step in which only ionexchange of nitrates occurs, and a second one during which the catalystis regenerated. This process has worse performance compared to the RIE-R.Only 36.7% of the nitrates present in the resin at the beginning of theregeneration were eliminated.The catalyst was characterized by CO chemisorption, SEM, EPMA, TEM, andXRD. Pd migration towards the external surface occurs during thereaction, and also a decreased in dispersion takes place. This has littleeffect on the activity for nitrate reduction.A regeneration mechanism is presented to explain the experimentalobservations.
Fil: Mendow, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Sánchez, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Grosso, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Materia
Nitrates Reduction
Pd-Cu
Ion Exchange Resin,
Continuous Process
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/42762
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/42762
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resinMendow, GustavoSánchez, AgustinaGrosso, C.Querini, Carlos AlbertoNitrates ReductionPd-CuIon Exchange Resin,Continuous Processhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2In this work, a Pd-Cu catalyst supported on a macroporous anionexchange resin was used in two novel processes to treat watercontaminated with nitrates. The catalytic performance was evaluated in acontinuous fixed bed reactor. The process (Reaction + Ion Exchange) -Regeneration, named RIE-R, has two steps: 1- reaction and ion exchange(RIE); 2- Regeneration (R). It was found that a hydrogen flow rateincrease does not affect the nitrate conversion during the RIE step,while the selectivity to nitrogen decreased. The presence of competingions (sulphate, bicarbonate, chlorides) led to a decrease in the nitrateconversion. In any case, the water obtained in the process meets thelimits established by the World Health Organization. During theregeneration step, carried out just by bubbling hydrogen to the catalyticbed, 100% of nitrates present in the resin at the end of the RIE cyclewere eliminated.The other process, named IE-R, has a first step in which only ionexchange of nitrates occurs, and a second one during which the catalystis regenerated. This process has worse performance compared to the RIE-R.Only 36.7% of the nitrates present in the resin at the beginning of theregeneration were eliminated.The catalyst was characterized by CO chemisorption, SEM, EPMA, TEM, andXRD. Pd migration towards the external surface occurs during thereaction, and also a decreased in dispersion takes place. This has littleeffect on the activity for nitrate reduction.A regeneration mechanism is presented to explain the experimentalobservations.Fil: Mendow, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Sánchez, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Grosso, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaFil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; ArgentinaElsevier2017-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42762Mendow, Gustavo; Sánchez, Agustina; Grosso, C.; Querini, Carlos Alberto; A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin; Elsevier; Journal of Environmental Chemical Engineering; 5; 2; 2-2017; 1404-14142213-3437CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2017.01.033info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S2213343717300337info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:46Zoai:ri.conicet.gov.ar:11336/42762instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:51:46.605CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
title A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
spellingShingle A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
Mendow, Gustavo
Nitrates Reduction
Pd-Cu
Ion Exchange Resin,
Continuous Process
title_short A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
title_full A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
title_fullStr A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
title_full_unstemmed A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
title_sort A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin
dc.creator.none.fl_str_mv Mendow, Gustavo
Sánchez, Agustina
Grosso, C.
Querini, Carlos Alberto
author Mendow, Gustavo
author_facet Mendow, Gustavo
Sánchez, Agustina
Grosso, C.
Querini, Carlos Alberto
author_role author
author2 Sánchez, Agustina
Grosso, C.
Querini, Carlos Alberto
author2_role author
author
author
dc.subject.none.fl_str_mv Nitrates Reduction
Pd-Cu
Ion Exchange Resin,
Continuous Process
topic Nitrates Reduction
Pd-Cu
Ion Exchange Resin,
Continuous Process
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In this work, a Pd-Cu catalyst supported on a macroporous anionexchange resin was used in two novel processes to treat watercontaminated with nitrates. The catalytic performance was evaluated in acontinuous fixed bed reactor. The process (Reaction + Ion Exchange) -Regeneration, named RIE-R, has two steps: 1- reaction and ion exchange(RIE); 2- Regeneration (R). It was found that a hydrogen flow rateincrease does not affect the nitrate conversion during the RIE step,while the selectivity to nitrogen decreased. The presence of competingions (sulphate, bicarbonate, chlorides) led to a decrease in the nitrateconversion. In any case, the water obtained in the process meets thelimits established by the World Health Organization. During theregeneration step, carried out just by bubbling hydrogen to the catalyticbed, 100% of nitrates present in the resin at the end of the RIE cyclewere eliminated.The other process, named IE-R, has a first step in which only ionexchange of nitrates occurs, and a second one during which the catalystis regenerated. This process has worse performance compared to the RIE-R.Only 36.7% of the nitrates present in the resin at the beginning of theregeneration were eliminated.The catalyst was characterized by CO chemisorption, SEM, EPMA, TEM, andXRD. Pd migration towards the external surface occurs during thereaction, and also a decreased in dispersion takes place. This has littleeffect on the activity for nitrate reduction.A regeneration mechanism is presented to explain the experimentalobservations.
Fil: Mendow, Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Sánchez, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Grosso, C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
Fil: Querini, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina
description In this work, a Pd-Cu catalyst supported on a macroporous anionexchange resin was used in two novel processes to treat watercontaminated with nitrates. The catalytic performance was evaluated in acontinuous fixed bed reactor. The process (Reaction + Ion Exchange) -Regeneration, named RIE-R, has two steps: 1- reaction and ion exchange(RIE); 2- Regeneration (R). It was found that a hydrogen flow rateincrease does not affect the nitrate conversion during the RIE step,while the selectivity to nitrogen decreased. The presence of competingions (sulphate, bicarbonate, chlorides) led to a decrease in the nitrateconversion. In any case, the water obtained in the process meets thelimits established by the World Health Organization. During theregeneration step, carried out just by bubbling hydrogen to the catalyticbed, 100% of nitrates present in the resin at the end of the RIE cyclewere eliminated.The other process, named IE-R, has a first step in which only ionexchange of nitrates occurs, and a second one during which the catalystis regenerated. This process has worse performance compared to the RIE-R.Only 36.7% of the nitrates present in the resin at the beginning of theregeneration were eliminated.The catalyst was characterized by CO chemisorption, SEM, EPMA, TEM, andXRD. Pd migration towards the external surface occurs during thereaction, and also a decreased in dispersion takes place. This has littleeffect on the activity for nitrate reduction.A regeneration mechanism is presented to explain the experimentalobservations.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/42762
Mendow, Gustavo; Sánchez, Agustina; Grosso, C.; Querini, Carlos Alberto; A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin; Elsevier; Journal of Environmental Chemical Engineering; 5; 2; 2-2017; 1404-1414
2213-3437
CONICET Digital
CONICET
url http://hdl.handle.net/11336/42762
identifier_str_mv Mendow, Gustavo; Sánchez, Agustina; Grosso, C.; Querini, Carlos Alberto; A novel process for nitrate reduction in water using bimetallic Pd-Cu catalysts supported on ion exchange resin; Elsevier; Journal of Environmental Chemical Engineering; 5; 2; 2-2017; 1404-1414
2213-3437
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2017.01.033
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S2213343717300337
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842269116183871488
score 13.13397

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