Parâmetros termodinâmicos da casca de laranja desidratada
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000400488&lng=en&nrm=iso&tlng=en http://hdl.handle.net/11449/128413 |
Resumo: | The global energy scenario is currently a widely discussed topic, with growing concern about the future supplies. Thus, much attention has been dedicated to the utilization of biomass as an energy resource. In this respect, orange peel has become a material of great interest, especially to Brazil, which generates around 9.5 million tons of this waste per year. To this end, the authors studied the kinetics of the thermal processing of dried orange peel in inert and oxidizing atmosphere. The thermodynamic parameters were determined by the Ozawa-Flynn-Wall method for the global process observed during heating from the 25 degrees C up to 800 degrees C. The thermal analysis in air and nitrogen showed 3-2 stages of mass loss, respectively, with approximately 20% residual mass under a nitrogen atmosphere. The increase in the values of activation energy for the conversion points between 20% and 60% for thermal effects in air and nitrogen atmosphere was observed. The activation energy obtained in an oxidizing atmosphere was higher than that obtained under a nitrogen atmosphere. The fourier-transform infrared spectroscopy and X-ray diffraction analysis showed that the material has a high level of complexity with the presence of alkali and alkaline earth groups as well as phosphate, plus substances such as pectin, cellulose and lignin. |
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Parâmetros termodinâmicos da casca de laranja desidratadaThermodynamic parameters of dehydrated orange peelThermodynamic parametersFruit residueThermogravimetryActivation energyBiofuelThe global energy scenario is currently a widely discussed topic, with growing concern about the future supplies. Thus, much attention has been dedicated to the utilization of biomass as an energy resource. In this respect, orange peel has become a material of great interest, especially to Brazil, which generates around 9.5 million tons of this waste per year. To this end, the authors studied the kinetics of the thermal processing of dried orange peel in inert and oxidizing atmosphere. The thermodynamic parameters were determined by the Ozawa-Flynn-Wall method for the global process observed during heating from the 25 degrees C up to 800 degrees C. The thermal analysis in air and nitrogen showed 3-2 stages of mass loss, respectively, with approximately 20% residual mass under a nitrogen atmosphere. The increase in the values of activation energy for the conversion points between 20% and 60% for thermal effects in air and nitrogen atmosphere was observed. The activation energy obtained in an oxidizing atmosphere was higher than that obtained under a nitrogen atmosphere. The fourier-transform infrared spectroscopy and X-ray diffraction analysis showed that the material has a high level of complexity with the presence of alkali and alkaline earth groups as well as phosphate, plus substances such as pectin, cellulose and lignin.Univ Estadual Paulista, Dept Engn Ambiental, BR-18087180 Sorocaba, SP, BrazilDepartamento de Engenharia Ambiental, Universidade Estadual Paulista "Júlio de Mesquita Filho", Avenida Três de Março, 511, Alto da Boa Vista, 18087-180 Sorocaba – SP, BrasilSoc Brasileira QuimicaUniversidade Estadual Paulista (Unesp)Santos, Carolina M. [UNESP]Morais, Leandro Cardoso de [UNESP]2015-10-21T13:09:40Z2015-10-21T13:09:40Z2015-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article488-492application/pdfhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000400488&lng=en&nrm=iso&tlng=enQuimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 38, n. 4, p. 488-492, 2015.0100-4042http://hdl.handle.net/11449/12841310.5935/0100-4042.20150026S0100-40422015000400488WOS:000356610900006S0100-40422015000400488.pdf0000-0003-1468-54539900570420098740Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporQuimica Nova0.6460,255info:eu-repo/semantics/openAccess2023-12-14T06:17:45Zoai:repositorio.unesp.br:11449/128413Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:17:02.605223Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Parâmetros termodinâmicos da casca de laranja desidratada Thermodynamic parameters of dehydrated orange peel |
title |
Parâmetros termodinâmicos da casca de laranja desidratada |
spellingShingle |
Parâmetros termodinâmicos da casca de laranja desidratada Santos, Carolina M. [UNESP] Thermodynamic parameters Fruit residue Thermogravimetry Activation energy Biofuel |
title_short |
Parâmetros termodinâmicos da casca de laranja desidratada |
title_full |
Parâmetros termodinâmicos da casca de laranja desidratada |
title_fullStr |
Parâmetros termodinâmicos da casca de laranja desidratada |
title_full_unstemmed |
Parâmetros termodinâmicos da casca de laranja desidratada |
title_sort |
Parâmetros termodinâmicos da casca de laranja desidratada |
author |
Santos, Carolina M. [UNESP] |
author_facet |
Santos, Carolina M. [UNESP] Morais, Leandro Cardoso de [UNESP] |
author_role |
author |
author2 |
Morais, Leandro Cardoso de [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Santos, Carolina M. [UNESP] Morais, Leandro Cardoso de [UNESP] |
dc.subject.por.fl_str_mv |
Thermodynamic parameters Fruit residue Thermogravimetry Activation energy Biofuel |
topic |
Thermodynamic parameters Fruit residue Thermogravimetry Activation energy Biofuel |
description |
The global energy scenario is currently a widely discussed topic, with growing concern about the future supplies. Thus, much attention has been dedicated to the utilization of biomass as an energy resource. In this respect, orange peel has become a material of great interest, especially to Brazil, which generates around 9.5 million tons of this waste per year. To this end, the authors studied the kinetics of the thermal processing of dried orange peel in inert and oxidizing atmosphere. The thermodynamic parameters were determined by the Ozawa-Flynn-Wall method for the global process observed during heating from the 25 degrees C up to 800 degrees C. The thermal analysis in air and nitrogen showed 3-2 stages of mass loss, respectively, with approximately 20% residual mass under a nitrogen atmosphere. The increase in the values of activation energy for the conversion points between 20% and 60% for thermal effects in air and nitrogen atmosphere was observed. The activation energy obtained in an oxidizing atmosphere was higher than that obtained under a nitrogen atmosphere. The fourier-transform infrared spectroscopy and X-ray diffraction analysis showed that the material has a high level of complexity with the presence of alkali and alkaline earth groups as well as phosphate, plus substances such as pectin, cellulose and lignin. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-10-21T13:09:40Z 2015-10-21T13:09:40Z 2015-05-01 |
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://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000400488&lng=en&nrm=iso&tlng=en Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 38, n. 4, p. 488-492, 2015. 0100-4042 http://hdl.handle.net/11449/128413 10.5935/0100-4042.20150026 S0100-40422015000400488 WOS:000356610900006 S0100-40422015000400488.pdf 0000-0003-1468-5453 9900570420098740 |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000400488&lng=en&nrm=iso&tlng=en http://hdl.handle.net/11449/128413 |
identifier_str_mv |
Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 38, n. 4, p. 488-492, 2015. 0100-4042 10.5935/0100-4042.20150026 S0100-40422015000400488 WOS:000356610900006 S0100-40422015000400488.pdf 0000-0003-1468-5453 9900570420098740 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Quimica Nova 0.646 0,255 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
488-492 application/pdf |
dc.publisher.none.fl_str_mv |
Soc Brasileira Quimica |
publisher.none.fl_str_mv |
Soc Brasileira Quimica |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129183332696064 |