ISOTERMAS E CALOR ISOSTÉRICO DAS SEMENTES DE PINHÃO-MANSO - DOI: 10.13083/1414-3984/reveng.v23n1p9-18

Chaves, Tarcísio Honório; Resende, O.; Oliveira, Daniel Emanuel Cabral de; Smaniotto, Thaís Adriana de Souza; Sousa, Kelly Aparecida de

doi:10.13083/reveng.v23i1.591

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“…For isotherms of Crambe abyssinica fruits, Costa et al (2015) found that the Sigma Copace model fitted best to the phenomenon of hygroscopicity, as observed in other studies (Chaves et al, 2015;Barbosa et al, 2016;Corrêa et al, 2016a;Ullmann et al, 2016).…”

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Desorption isotherms and isosteric heat of araticum (Annona crassiflora Mart.) seeds

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Resende

Sousa

et al. 2020

Rev. bras. eng. agríc. ambient.

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The objective of this study was to determine the desorption isotherms and isosteric heat of Annona crassiflora Mart. seeds, using Akaike information criterion (AIC) and Schwarz’s Bayesian information criterion (BIC) to assist in the choice of the nonlinear regression model. The desorption isotherms were determined by indirect static method and water activity was obtained using the instrument HygroPalm; the product was put in the device in B.O.D. chamber set at 10, 20, 30 and 40 °C. Several nonlinear regression models were fitted to the experimental data by the Gauss-Newton method. The desorption isotherms of Annona crassiflora Mart. seeds can be represented by the models of Chung-Pfost, Copace, Modified GAB, Modified Henderson, Modified Oswin, Sabbah and Sigma Copace. However, the Sigma Copace model showed better fit to the experimental data, with lower AIC and BIC values, being chosen to represent the desorption isotherms of Annona crassiflora Mart seeds. Isosteric heat increased with decreasing moisture content, requiring a greater amount of energy to remove water from seeds, with values ranging from 2541.64 to 2481.56 kJ kg-1, for the moisture content range from 5.69 to 14.93% on a dry basis.

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“…varied from 2541.64 to 2481.56 kJ kg -1 . According to Chaves et al (2015), for Jatropha curcas L. seeds, at temperatures of 10, 20, 30 and 40 °C and equilibrium moisture content ranging from 5.6 to 13.4 (% d.b. ), the integral isosteric heat varied from 3035.61 to 2631.89 kJ kg -1 .…”

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confidence: 99%