Evaluation of thermodynamic properties using GAB model to describe the desorption process of cocoa beans

dc.creatorOliveira, Gabriel Henrique Horta de
dc.creatorCorrêa, Paulo Cesar
dc.creatorSantos, Emı́lio de Souza
dc.creatorTreto, Pedro Casanova
dc.creatorDiniz, Mayra Darliane Martins Silva
dc.date2018-10-31T10:51:21Z
dc.date2018-10-31T10:51:21Z
dc.date2011-07-26
dc.date.accessioned2023-09-27T20:58:25Z
dc.date.available2023-09-27T20:58:25Z
dc.identifier1365-2621
dc.identifierhttps://onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2621.2011.02719.x
dc.identifierhttp://www.locus.ufv.br/handle/123456789/22428
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8951995
dc.descriptionThe desorption isotherms and thermodynamic properties of cocoa beans were obtained during the drying process of this product. The isotherms were determined by dynamic method for various temperature (25, 35,45 and 55 C) and relative humidity (RH) conditions (30, 40, 50, 60, 70 and 80%). Equilibrium moisture content data were correlated by the Guggenheim–Anderson–de Boer (GAB) model, which presented good fit to the data, according to statistical procedures. Equilibrium moisture content ranged from 5.90 to 16.67 d.b.; it increased with an increment in the RH and decreased with increased temperature at a constant RH.Enthalpy values for each model coefficient were encountered, ranging from )90.05 to 545.96 kJ kg )1 . The integral isosteric heat of desorption and differential entropy increased with decreased equilibrium moisture content, a tendency also found for Gibbs free energy.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherInternational Journal of Food Science and Technology
dc.relationv. 46, n. 10, p. 2077– 2084, out. 2011
dc.rightsOpen Access
dc.subjectEntropy
dc.subjectGibbs free energy
dc.subjectIsosteric heat
dc.subjectMonolayer moisture content
dc.subjectTheobroma cacao
dc.titleEvaluation of thermodynamic properties using GAB model to describe the desorption process of cocoa beans
dc.typeArtigo


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