Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species
- Autores
- Cabrera, Maria Ines; Grau, Ricardo José Antonio
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The kinetics of the hydrogenation and cis/trans isomerization of methyl oleate on a Ni/a-Al2O3 catalyst was studied in the absence of mass-transport limitation, at 398K=T=443Kand370kPa = PH2 = 650 kPa. On the basis of the Horiuti–Polanyi mechanism, involving a sigma half-hydrogenated surface intermediate, a kinetic model was derived in the framework provided by the Langmuir–Hinshelwood–Hougen–Watson formalism, using the advanced concept of semi-competitive adsorption. The classical LHHW rate equations for competitive and non-competitive adsorption between the hydrogen and large organic species were matched as asymptotic cases. Statistical results clearly demonstrated the inadequacy of the model approaching non-competitive adsorption to describe the experimental data, but the residual sum of squares between experimental data and model predictions was insufficient to discriminate between the kinetic models based on competitive and semi-competitive adsorption. However, the model considering semi-competitive adsorption gave additional indication that the adsorbed molecules of cis- and trans-methyl oleate could cover up to eleven surface sites, which is in excellent agreement with a rough estimate from primary molecular modeling. This feature seems to be the most fascinating result, since it is factual and unattainable from the classical LHHW approaches. Results and distinctive features characterizing this advanced approach are highlighted. Some insights to improve parameter estimation and adsorption model discrimination are also pointed out.
Fil: Cabrera, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Grau, Ricardo José Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina - Materia
-
Isomerization
Hydrogenation
Semi-Competitive Adsorption
Methyl Oleate - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/24739
Ver los metadatos del registro completo
id |
CONICETDig_75b4594ba8b06d276406dab4c26a49db |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/24739 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic SpeciesCabrera, Maria InesGrau, Ricardo José AntonioIsomerizationHydrogenationSemi-Competitive AdsorptionMethyl Oleatehttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The kinetics of the hydrogenation and cis/trans isomerization of methyl oleate on a Ni/a-Al2O3 catalyst was studied in the absence of mass-transport limitation, at 398K=T=443Kand370kPa = PH2 = 650 kPa. On the basis of the Horiuti–Polanyi mechanism, involving a sigma half-hydrogenated surface intermediate, a kinetic model was derived in the framework provided by the Langmuir–Hinshelwood–Hougen–Watson formalism, using the advanced concept of semi-competitive adsorption. The classical LHHW rate equations for competitive and non-competitive adsorption between the hydrogen and large organic species were matched as asymptotic cases. Statistical results clearly demonstrated the inadequacy of the model approaching non-competitive adsorption to describe the experimental data, but the residual sum of squares between experimental data and model predictions was insufficient to discriminate between the kinetic models based on competitive and semi-competitive adsorption. However, the model considering semi-competitive adsorption gave additional indication that the adsorbed molecules of cis- and trans-methyl oleate could cover up to eleven surface sites, which is in excellent agreement with a rough estimate from primary molecular modeling. This feature seems to be the most fascinating result, since it is factual and unattainable from the classical LHHW approaches. Results and distinctive features characterizing this advanced approach are highlighted. Some insights to improve parameter estimation and adsorption model discrimination are also pointed out.Fil: Cabrera, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Grau, Ricardo José Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaElsevier Science2008-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24739Cabrera, Maria Ines; Grau, Ricardo José Antonio; Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 287; 1-2; 2-2008; 24-321381-1169CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.molcata.2008.02.014info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1381116908001179info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:32:37Zoai:ri.conicet.gov.ar:11336/24739instacron: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 10:32:37.261CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
title |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
spellingShingle |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species Cabrera, Maria Ines Isomerization Hydrogenation Semi-Competitive Adsorption Methyl Oleate |
title_short |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
title_full |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
title_fullStr |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
title_full_unstemmed |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
title_sort |
Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species |
dc.creator.none.fl_str_mv |
Cabrera, Maria Ines Grau, Ricardo José Antonio |
author |
Cabrera, Maria Ines |
author_facet |
Cabrera, Maria Ines Grau, Ricardo José Antonio |
author_role |
author |
author2 |
Grau, Ricardo José Antonio |
author2_role |
author |
dc.subject.none.fl_str_mv |
Isomerization Hydrogenation Semi-Competitive Adsorption Methyl Oleate |
topic |
Isomerization Hydrogenation Semi-Competitive Adsorption Methyl Oleate |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
dc.description.none.fl_txt_mv |
The kinetics of the hydrogenation and cis/trans isomerization of methyl oleate on a Ni/a-Al2O3 catalyst was studied in the absence of mass-transport limitation, at 398K=T=443Kand370kPa = PH2 = 650 kPa. On the basis of the Horiuti–Polanyi mechanism, involving a sigma half-hydrogenated surface intermediate, a kinetic model was derived in the framework provided by the Langmuir–Hinshelwood–Hougen–Watson formalism, using the advanced concept of semi-competitive adsorption. The classical LHHW rate equations for competitive and non-competitive adsorption between the hydrogen and large organic species were matched as asymptotic cases. Statistical results clearly demonstrated the inadequacy of the model approaching non-competitive adsorption to describe the experimental data, but the residual sum of squares between experimental data and model predictions was insufficient to discriminate between the kinetic models based on competitive and semi-competitive adsorption. However, the model considering semi-competitive adsorption gave additional indication that the adsorbed molecules of cis- and trans-methyl oleate could cover up to eleven surface sites, which is in excellent agreement with a rough estimate from primary molecular modeling. This feature seems to be the most fascinating result, since it is factual and unattainable from the classical LHHW approaches. Results and distinctive features characterizing this advanced approach are highlighted. Some insights to improve parameter estimation and adsorption model discrimination are also pointed out. Fil: Cabrera, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina Fil: Grau, Ricardo José Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina |
description |
The kinetics of the hydrogenation and cis/trans isomerization of methyl oleate on a Ni/a-Al2O3 catalyst was studied in the absence of mass-transport limitation, at 398K=T=443Kand370kPa = PH2 = 650 kPa. On the basis of the Horiuti–Polanyi mechanism, involving a sigma half-hydrogenated surface intermediate, a kinetic model was derived in the framework provided by the Langmuir–Hinshelwood–Hougen–Watson formalism, using the advanced concept of semi-competitive adsorption. The classical LHHW rate equations for competitive and non-competitive adsorption between the hydrogen and large organic species were matched as asymptotic cases. Statistical results clearly demonstrated the inadequacy of the model approaching non-competitive adsorption to describe the experimental data, but the residual sum of squares between experimental data and model predictions was insufficient to discriminate between the kinetic models based on competitive and semi-competitive adsorption. However, the model considering semi-competitive adsorption gave additional indication that the adsorbed molecules of cis- and trans-methyl oleate could cover up to eleven surface sites, which is in excellent agreement with a rough estimate from primary molecular modeling. This feature seems to be the most fascinating result, since it is factual and unattainable from the classical LHHW approaches. Results and distinctive features characterizing this advanced approach are highlighted. Some insights to improve parameter estimation and adsorption model discrimination are also pointed out. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-02 |
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/11336/24739 Cabrera, Maria Ines; Grau, Ricardo José Antonio; Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 287; 1-2; 2-2008; 24-32 1381-1169 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/24739 |
identifier_str_mv |
Cabrera, Maria Ines; Grau, Ricardo José Antonio; Methyl Oleate Isomerization and Hydrogenation over Ni/α-Al2O3: A Kinetic Study Recognizing Differences in the Molecular Size of Hydrogen and Organic Species; Elsevier Science; Journal of Molecular Catalysis A: Chemical; 287; 1-2; 2-2008; 24-32 1381-1169 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.molcata.2008.02.014 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1381116908001179 |
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 |
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_ |
1844614340127227904 |
score |
13.070432 |