Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 

Detalhes bibliográficos
Autor(a) principal: Retnamma, Rajasree
Data de Publicação: 2014
Outros Autores: Novais, Augusto Q., Rangel, C. M., Yu, Lin, Matthews, Michael A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/2632
Resumo: The present work reports the kinetic modeling of self-hydrolysis of non-buffered, nonstabilized NaBH4 solutions by model-based isoconversional method. The overall kinetics is described by a ‘reaction-order’ model in a practical operating window of 10-20 wt% NaBH4 solutions at 25-80 ºC and 0-50% conversions. The apparent activation energy and preexponential factor are interrelated through a kinetic compensation effect (KCE). The apparent reaction order remains constant at a given temperature irrespective of extent of conversion and decreases with increase in temperature. It decreases from first-order to 0.26 with increase in temperature from 25 to 80 ºC. 
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spelling Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method Hydrogen productionIsoconversional methodKineticsSelf-hydrolysisSodium borohydrideThe present work reports the kinetic modeling of self-hydrolysis of non-buffered, nonstabilized NaBH4 solutions by model-based isoconversional method. The overall kinetics is described by a ‘reaction-order’ model in a practical operating window of 10-20 wt% NaBH4 solutions at 25-80 ºC and 0-50% conversions. The apparent activation energy and preexponential factor are interrelated through a kinetic compensation effect (KCE). The apparent reaction order remains constant at a given temperature irrespective of extent of conversion and decreases with increase in temperature. It decreases from first-order to 0.26 with increase in temperature from 25 to 80 ºC. ElsevierRepositório do LNEGRetnamma, RajasreeNovais, Augusto Q.Rangel, C. M.Yu, LinMatthews, Michael A.2015-03-11T16:42:27Z2014-01-01T00:00:00Z2014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/2632engRetnamma, R.; Novais, A.Q.; Rangel, C.M.; Yu, L.; Matthews, M.A. - Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method. In: International Journal of Hydrogen Energy, 2014, Vol. 39, p. 6567-65760360-3199info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T12:27:46Zoai:repositorio.lneg.pt:10400.9/2632Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:35:36.535837Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
title Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
spellingShingle Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
Retnamma, Rajasree
Hydrogen production
Isoconversional method
Kinetics
Self-hydrolysis
Sodium borohydride
title_short Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
title_full Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
title_fullStr Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
title_full_unstemmed Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
title_sort Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method 
author Retnamma, Rajasree
author_facet Retnamma, Rajasree
Novais, Augusto Q.
Rangel, C. M.
Yu, Lin
Matthews, Michael A.
author_role author
author2 Novais, Augusto Q.
Rangel, C. M.
Yu, Lin
Matthews, Michael A.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Retnamma, Rajasree
Novais, Augusto Q.
Rangel, C. M.
Yu, Lin
Matthews, Michael A.
dc.subject.por.fl_str_mv Hydrogen production
Isoconversional method
Kinetics
Self-hydrolysis
Sodium borohydride
topic Hydrogen production
Isoconversional method
Kinetics
Self-hydrolysis
Sodium borohydride
description The present work reports the kinetic modeling of self-hydrolysis of non-buffered, nonstabilized NaBH4 solutions by model-based isoconversional method. The overall kinetics is described by a ‘reaction-order’ model in a practical operating window of 10-20 wt% NaBH4 solutions at 25-80 ºC and 0-50% conversions. The apparent activation energy and preexponential factor are interrelated through a kinetic compensation effect (KCE). The apparent reaction order remains constant at a given temperature irrespective of extent of conversion and decreases with increase in temperature. It decreases from first-order to 0.26 with increase in temperature from 25 to 80 ºC. 
publishDate 2014
dc.date.none.fl_str_mv 2014-01-01T00:00:00Z
2014-01-01T00:00:00Z
2015-03-11T16:42:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/2632
url http://hdl.handle.net/10400.9/2632
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Retnamma, R.; Novais, A.Q.; Rangel, C.M.; Yu, L.; Matthews, M.A. - Kinetic modeling of self-hydrolysis of aqueous NaBH4 solutions by model-based isoconversional method. In: International Journal of Hydrogen Energy, 2014, Vol. 39, p. 6567-6576
0360-3199
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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