Kinetic study of Hubnerite (MnWO4) chlorination

Autores
Fouga, Gastón Galo; Taddeo, Raúl Matías; Bosco, Marta Verónica; Bohe, Ana Ester
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The kinetics of Argentinean Hubnerite (MnWO 4) chlorination using gaseous chlorine as chlorination agent was studied between 750 and 950 °C. The relative mass change during the chlorination reaction was continuously monitored using a high resolution thermogravimetric system. The starting temperature for the reaction of the manganese tungstate with chlorine was determined at about 650°C. The influence of gaseous flow rate, sample mass, chlorine partial pressure, and temperature on the reaction rate was analyzed. The dependence of the reaction rate with sample mass clearly indicates that the reaction is not occurring under chemical control, so the reaction proceeds under mixed control for sample masses greater than 0.5 mg. In those conditions, an apparent activation energy of 198 ± 9 kJ mol -1 was obtained with an isoconversional method. Concerning the influence of chlorine partial pressure, it was determined that pressures greater than 35 kPa do not modify the kinetic regime. For the experiment at 850°C, it was found that the chlorination rate was proportional to a potential function of the partial pressure of chlorine whose exponent is around 0.85. Finally, a global rate equation that includes these parameters was developed.
Fil: Fouga, Gastón Galo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Taddeo, R. M.. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Bosco, Marta Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Bohe, Ana Ester. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Materia
CHLORINATION
HUBNERITE
KINETICS
MNWO 4
THERMOGRAVIMETRY
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:11336/94180
Acceder
id CONICETDig_c06eade03a70a83e0c4e06523c77fba6
oai_identifier_str oai:ri.conicet.gov.ar:11336/94180
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinetic study of Hubnerite (MnWO4) chlorinationFouga, Gastón GaloTaddeo, Raúl MatíasBosco, Marta VerónicaBohe, Ana EsterCHLORINATIONHUBNERITEKINETICSMNWO 4THERMOGRAVIMETRYhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2The kinetics of Argentinean Hubnerite (MnWO 4) chlorination using gaseous chlorine as chlorination agent was studied between 750 and 950 °C. The relative mass change during the chlorination reaction was continuously monitored using a high resolution thermogravimetric system. The starting temperature for the reaction of the manganese tungstate with chlorine was determined at about 650°C. The influence of gaseous flow rate, sample mass, chlorine partial pressure, and temperature on the reaction rate was analyzed. The dependence of the reaction rate with sample mass clearly indicates that the reaction is not occurring under chemical control, so the reaction proceeds under mixed control for sample masses greater than 0.5 mg. In those conditions, an apparent activation energy of 198 ± 9 kJ mol -1 was obtained with an isoconversional method. Concerning the influence of chlorine partial pressure, it was determined that pressures greater than 35 kPa do not modify the kinetic regime. For the experiment at 850°C, it was found that the chlorination rate was proportional to a potential function of the partial pressure of chlorine whose exponent is around 0.85. Finally, a global rate equation that includes these parameters was developed.Fil: Fouga, Gastón Galo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaFil: Taddeo, R. M.. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaFil: Bosco, Marta Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Bohe, Ana Ester. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; ArgentinaElsevier Science2012-05-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94180Fouga, Gastón Galo; Taddeo, Raúl Matías; Bosco, Marta Verónica; Bohe, Ana Ester; Kinetic study of Hubnerite (MnWO4) chlorination; Elsevier Science; Thermochimica Acta; 536; 23-5-2012; 30-400040-6031CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S004060311200072Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2012.02.015info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:41:39Zoai:ri.conicet.gov.ar:11336/94180instacron: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:34982025-09-29 10:41:39.709CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinetic study of Hubnerite (MnWO4) chlorination
title Kinetic study of Hubnerite (MnWO4) chlorination
spellingShingle Kinetic study of Hubnerite (MnWO4) chlorination
Fouga, Gastón Galo
CHLORINATION
HUBNERITE
KINETICS
MNWO 4
THERMOGRAVIMETRY
title_short Kinetic study of Hubnerite (MnWO4) chlorination
title_full Kinetic study of Hubnerite (MnWO4) chlorination
title_fullStr Kinetic study of Hubnerite (MnWO4) chlorination
title_full_unstemmed Kinetic study of Hubnerite (MnWO4) chlorination
title_sort Kinetic study of Hubnerite (MnWO4) chlorination
dc.creator.none.fl_str_mv Fouga, Gastón Galo
Taddeo, Raúl Matías
Bosco, Marta Verónica
Bohe, Ana Ester
author Fouga, Gastón Galo
author_facet Fouga, Gastón Galo
Taddeo, Raúl Matías
Bosco, Marta Verónica
Bohe, Ana Ester
author_role author
author2 Taddeo, Raúl Matías
Bosco, Marta Verónica
Bohe, Ana Ester
author2_role author
author
author
dc.subject.none.fl_str_mv CHLORINATION
HUBNERITE
KINETICS
MNWO 4
THERMOGRAVIMETRY
topic CHLORINATION
HUBNERITE
KINETICS
MNWO 4
THERMOGRAVIMETRY
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The kinetics of Argentinean Hubnerite (MnWO 4) chlorination using gaseous chlorine as chlorination agent was studied between 750 and 950 °C. The relative mass change during the chlorination reaction was continuously monitored using a high resolution thermogravimetric system. The starting temperature for the reaction of the manganese tungstate with chlorine was determined at about 650°C. The influence of gaseous flow rate, sample mass, chlorine partial pressure, and temperature on the reaction rate was analyzed. The dependence of the reaction rate with sample mass clearly indicates that the reaction is not occurring under chemical control, so the reaction proceeds under mixed control for sample masses greater than 0.5 mg. In those conditions, an apparent activation energy of 198 ± 9 kJ mol -1 was obtained with an isoconversional method. Concerning the influence of chlorine partial pressure, it was determined that pressures greater than 35 kPa do not modify the kinetic regime. For the experiment at 850°C, it was found that the chlorination rate was proportional to a potential function of the partial pressure of chlorine whose exponent is around 0.85. Finally, a global rate equation that includes these parameters was developed.
Fil: Fouga, Gastón Galo. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Taddeo, R. M.. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
Fil: Bosco, Marta Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Bohe, Ana Ester. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina
description The kinetics of Argentinean Hubnerite (MnWO 4) chlorination using gaseous chlorine as chlorination agent was studied between 750 and 950 °C. The relative mass change during the chlorination reaction was continuously monitored using a high resolution thermogravimetric system. The starting temperature for the reaction of the manganese tungstate with chlorine was determined at about 650°C. The influence of gaseous flow rate, sample mass, chlorine partial pressure, and temperature on the reaction rate was analyzed. The dependence of the reaction rate with sample mass clearly indicates that the reaction is not occurring under chemical control, so the reaction proceeds under mixed control for sample masses greater than 0.5 mg. In those conditions, an apparent activation energy of 198 ± 9 kJ mol -1 was obtained with an isoconversional method. Concerning the influence of chlorine partial pressure, it was determined that pressures greater than 35 kPa do not modify the kinetic regime. For the experiment at 850°C, it was found that the chlorination rate was proportional to a potential function of the partial pressure of chlorine whose exponent is around 0.85. Finally, a global rate equation that includes these parameters was developed.
publishDate 2012
dc.date.none.fl_str_mv 2012-05-23
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/11336/94180
Fouga, Gastón Galo; Taddeo, Raúl Matías; Bosco, Marta Verónica; Bohe, Ana Ester; Kinetic study of Hubnerite (MnWO4) chlorination; Elsevier Science; Thermochimica Acta; 536; 23-5-2012; 30-40
0040-6031
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94180
identifier_str_mv Fouga, Gastón Galo; Taddeo, Raúl Matías; Bosco, Marta Verónica; Bohe, Ana Ester; Kinetic study of Hubnerite (MnWO4) chlorination; Elsevier Science; Thermochimica Acta; 536; 23-5-2012; 30-40
0040-6031
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S004060311200072X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2012.02.015
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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_ 1844614447771942912
score 13.070432

Publicaciones similares