Thermodynamic properties of sorption of rice in the husk

This study aimed to determine the thermodynamic properties of sorption processes (desorption and adsorption) of rice in the husk, cv. Urucuia. A static-gravimetric method was used to reach equilibrium moisture content at different temperatures (10, 20, 30, 40, and 50 °C ± 1°C) and relative humidity...

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Detalhes bibliográficos
Autores: Zeymer, Juliana S., Corrêa, Paulo C., Oliveira, Gabriel H. H. de, Baptestini, Fernanda M., Faria, Igor L.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Brasil
Recursos:Universidade Federal de Viçosa (UFV)
Repositorio:LOCUS Repositório Institucional da UFV
Idioma:inglés
OAI Identifier:oai:locus.ufv.br:123456789/25038
Acesso em linha:http://dx.doi.org/10.1590/1809-4430-eng.agric.v38n3p369-375/2018
http://www.locus.ufv.br/handle/123456789/25038
Access Level:acceso abierto
Palavra-chave:Equilibrium moisture content
Integral isosteric heat of sorption
Differential entropy
Gibbs free energy
Enthalpy-entropy compensation theory
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spelling Thermodynamic properties of sorption of rice in the huskEquilibrium moisture contentIntegral isosteric heat of sorptionDifferential entropyGibbs free energyEnthalpy-entropy compensation theoryThis study aimed to determine the thermodynamic properties of sorption processes (desorption and adsorption) of rice in the husk, cv. Urucuia. A static-gravimetric method was used to reach equilibrium moisture content at different temperatures (10, 20, 30, 40, and 50 °C ± 1°C) and relative humidity levels (10, 30, 50, 70, and 90 % ± 2%). A decrease in moisture content led to an increment of the integral isosteric heat of sorption, indicating a higher demand for energy to remove moisture from the product. Differential entropy of sorption decreased along with a moisture content increment, with higher values for desorption. This indicates a higher mobility of water molecules during desorption if compared to adsorption. Gibbs free energy decreased with increasing temperature in both processes, with positive values for desorption (endothermic process), and negative for adsorption (exothermic process). The enthalpy-entropy compensation theory is valid for both sorption phenomena (desorption and adsorption) of rice in the husk, being both processes enthalpy controlled.Engenharia Agrícola2019-05-07T12:13:59Z2019-05-07T12:13:59Z2018-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf1809-4430http://dx.doi.org/10.1590/1809-4430-eng.agric.v38n3p369-375/2018http://www.locus.ufv.br/handle/123456789/25038engv. 38, n. 3, p. 369-375, may./ jun. 2018info:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVZeymer, Juliana S.Corrêa, Paulo C.Oliveira, Gabriel H. H. deBaptestini, Fernanda M.Faria, Igor L.2024-07-12T07:45:00Zoai:locus.ufv.br:123456789/25038Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:45LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Thermodynamic properties of sorption of rice in the husk
title Thermodynamic properties of sorption of rice in the husk
spellingShingle Thermodynamic properties of sorption of rice in the husk
Zeymer, Juliana S.
Equilibrium moisture content
Integral isosteric heat of sorption
Differential entropy
Gibbs free energy
Enthalpy-entropy compensation theory
title_short Thermodynamic properties of sorption of rice in the husk
title_full Thermodynamic properties of sorption of rice in the husk
title_fullStr Thermodynamic properties of sorption of rice in the husk
title_full_unstemmed Thermodynamic properties of sorption of rice in the husk
title_sort Thermodynamic properties of sorption of rice in the husk
dc.creator.none.fl_str_mv Zeymer, Juliana S.
Corrêa, Paulo C.
Oliveira, Gabriel H. H. de
Baptestini, Fernanda M.
Faria, Igor L.
author Zeymer, Juliana S.
author_facet Zeymer, Juliana S.
Corrêa, Paulo C.
Oliveira, Gabriel H. H. de
Baptestini, Fernanda M.
Faria, Igor L.
author_role author
author2 Corrêa, Paulo C.
Oliveira, Gabriel H. H. de
Baptestini, Fernanda M.
Faria, Igor L.
author2_role author
author
author
author
dc.subject.por.fl_str_mv Equilibrium moisture content
Integral isosteric heat of sorption
Differential entropy
Gibbs free energy
Enthalpy-entropy compensation theory
topic Equilibrium moisture content
Integral isosteric heat of sorption
Differential entropy
Gibbs free energy
Enthalpy-entropy compensation theory
description This study aimed to determine the thermodynamic properties of sorption processes (desorption and adsorption) of rice in the husk, cv. Urucuia. A static-gravimetric method was used to reach equilibrium moisture content at different temperatures (10, 20, 30, 40, and 50 °C ± 1°C) and relative humidity levels (10, 30, 50, 70, and 90 % ± 2%). A decrease in moisture content led to an increment of the integral isosteric heat of sorption, indicating a higher demand for energy to remove moisture from the product. Differential entropy of sorption decreased along with a moisture content increment, with higher values for desorption. This indicates a higher mobility of water molecules during desorption if compared to adsorption. Gibbs free energy decreased with increasing temperature in both processes, with positive values for desorption (endothermic process), and negative for adsorption (exothermic process). The enthalpy-entropy compensation theory is valid for both sorption phenomena (desorption and adsorption) of rice in the husk, being both processes enthalpy controlled.
publishDate 2018
dc.date.none.fl_str_mv 2018-05
2019-05-07T12:13:59Z
2019-05-07T12:13:59Z
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 1809-4430
http://dx.doi.org/10.1590/1809-4430-eng.agric.v38n3p369-375/2018
http://www.locus.ufv.br/handle/123456789/25038
identifier_str_mv 1809-4430
url http://dx.doi.org/10.1590/1809-4430-eng.agric.v38n3p369-375/2018
http://www.locus.ufv.br/handle/123456789/25038
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv v. 38, n. 3, p. 369-375, may./ jun. 2018
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv Engenharia Agrícola
publisher.none.fl_str_mv Engenharia Agrícola
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
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score 15,300719

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