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Determination of equilibrium isotherms and proper mathematical model for lime slices CIGR Journal
taghipour, mehdi; baratikakolaki, masoud; zomorodian, ali; nasiri, mehdi.
Equilibrium moisture content (EMC) at different air relative humidity and temperatures is a vital parameter in optimization of drying and storage processes. In the present study amount of moisture content in lime (Local variety) slice at different ambient temperatures of 30°C, 40°C and 50°C were measured using gravimetric method. The obtained E.M.C experimental values were employed to plot the isotherm curve at different environmental air temperatures. These data also were fed to fourteen popular mathematical models. The well-known statistical factors such as Coefficient of determination (R^2), Chi-square (χ2), Root of mean square error (RMSE) and Mean of relative deviation (MRD) were calculated to validate the goodness of fit. The Peleg Model was selected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosystem engineering lime slice; Equilibrium moisture content; Modeling; Monolayer.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3456
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GAB model and the thermodynamic properties of moisture sorption in soursop fruit powder Rev. Ciênc. Agron.
Baptestini,Fernanda Machado; Corrêa,Paulo Cesar; Ramos,Afonso Mota; Junqueira,Mateus da Silva; Zaidan,Iasmine Ramos.
ABSTRACT The aim of this study was to model and determine the thermodynamic properties of moisture sorption in soursop fruit powder. The isotherms were determined by the static method at temperatures of 10, 20, 30, 40 and 50 °C, and a water activity of between 0.113 and 0.868 (decimal). The GAB model effectively described the moisture sorption phenomenon of soursop powder. The monolayer moisture content ranged from 12.589 to 9.109% db. The enthalpy values related to the GAB model were negative, with -2581.035 kJ kg-1 for C0 and -107,758 kJ kg-1 for K0. The isosteric heat of sorption, entropy and Gibbs free energy had a high correlation with the equilibrium moisture content, and the correlation between enthalpy and entropy was confirmed for moisture...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Monolayer; Entropy; Gibbs free energy; Annona muricata L.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100401
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