Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Eclética Química |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702001000100014 |
Resumo: | Al(C9H6ON)3.2.5H2O was precipitated from the mixture of an aqueous solution of aluminium ion and an acid solution of 8-hydroxyquinoline, by increasing the pH value to 9.5 with ammonia aqueous solution. The TG curves in nitrogen atmosphere present mass losses due to dehydration, partial volatilisation (sublimation plus vaporisation) of the anhydrous compound followed by thermal decomposition with the formation of a mixture of carbonaceous and residues. The relation between sublimation and vaporisation depends on the heating rate used. The non isothermic integral isoconventional methods as linear equations of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose (KAS) were used to obtain the kinetic parameters from TG and DTA curves, respectively. Despite the fact that both dehydration and volatilisation reactions follow the linearity by using both methods, only for the volatilisation reaction the validity condition, 20<= E/RT<= 50, was verified. |
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Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate8-hydroxyquinolinatealuminiumkinetic parametersTGDTAvolatilisationAl(C9H6ON)3.2.5H2O was precipitated from the mixture of an aqueous solution of aluminium ion and an acid solution of 8-hydroxyquinoline, by increasing the pH value to 9.5 with ammonia aqueous solution. The TG curves in nitrogen atmosphere present mass losses due to dehydration, partial volatilisation (sublimation plus vaporisation) of the anhydrous compound followed by thermal decomposition with the formation of a mixture of carbonaceous and residues. The relation between sublimation and vaporisation depends on the heating rate used. The non isothermic integral isoconventional methods as linear equations of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose (KAS) were used to obtain the kinetic parameters from TG and DTA curves, respectively. Despite the fact that both dehydration and volatilisation reactions follow the linearity by using both methods, only for the volatilisation reaction the validity condition, 20<= E/RT<= 50, was verified.Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP2001-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702001000100014Eclética Química v.26 2001reponame:Eclética Químicainstname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)instacron:UNESP10.1590/S0100-46702001000100014info:eu-repo/semantics/openAccessRIBEIRO,Clóvis AugustoCRESPI,Marisa SpirandeliGUERREIRO,Cassia Teresa RameloVERONEZI,Ana Mariaeng2002-11-26T00:00:00Zoai:scielo:S0100-46702001000100014Revistahttp://revista.iq.unesp.br/ojs/index.php/ecletica/PUBhttps://revista.iq.unesp.br/ojs/index.php/ecletica/oaiecletica@ctrlk.com.br||ecletica@iq.unesp.br1678-46181678-4618opendoar:2002-11-26T00:00Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)false |
dc.title.none.fl_str_mv |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
title |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
spellingShingle |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate RIBEIRO,Clóvis Augusto 8-hydroxyquinolinate aluminium kinetic parameters TG DTA volatilisation |
title_short |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
title_full |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
title_fullStr |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
title_full_unstemmed |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
title_sort |
Dehydration and volatilization non isothermic kinetic of the solid state aluminium 8-hydroxyquinolinate |
author |
RIBEIRO,Clóvis Augusto |
author_facet |
RIBEIRO,Clóvis Augusto CRESPI,Marisa Spirandeli GUERREIRO,Cassia Teresa Ramelo VERONEZI,Ana Maria |
author_role |
author |
author2 |
CRESPI,Marisa Spirandeli GUERREIRO,Cassia Teresa Ramelo VERONEZI,Ana Maria |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
RIBEIRO,Clóvis Augusto CRESPI,Marisa Spirandeli GUERREIRO,Cassia Teresa Ramelo VERONEZI,Ana Maria |
dc.subject.por.fl_str_mv |
8-hydroxyquinolinate aluminium kinetic parameters TG DTA volatilisation |
topic |
8-hydroxyquinolinate aluminium kinetic parameters TG DTA volatilisation |
description |
Al(C9H6ON)3.2.5H2O was precipitated from the mixture of an aqueous solution of aluminium ion and an acid solution of 8-hydroxyquinoline, by increasing the pH value to 9.5 with ammonia aqueous solution. The TG curves in nitrogen atmosphere present mass losses due to dehydration, partial volatilisation (sublimation plus vaporisation) of the anhydrous compound followed by thermal decomposition with the formation of a mixture of carbonaceous and residues. The relation between sublimation and vaporisation depends on the heating rate used. The non isothermic integral isoconventional methods as linear equations of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose (KAS) were used to obtain the kinetic parameters from TG and DTA curves, respectively. Despite the fact that both dehydration and volatilisation reactions follow the linearity by using both methods, only for the volatilisation reaction the validity condition, 20<= E/RT<= 50, was verified. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702001000100014 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-46702001000100014 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-46702001000100014 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP |
publisher.none.fl_str_mv |
Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP |
dc.source.none.fl_str_mv |
Eclética Química v.26 2001 reponame:Eclética Química instname:Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Eclética Química |
collection |
Eclética Química |
repository.name.fl_str_mv |
Eclética Química - Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP) |
repository.mail.fl_str_mv |
ecletica@ctrlk.com.br||ecletica@iq.unesp.br |
_version_ |
1754734617220349952 |