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| Oliveira, Daniel Emanuel Cabral de; Resende, Osvaldo; Costa, Lílian Moreira; Silva, Hellismar Wakson da. |
| This study aimed to determine and evaluate the thermodynamic properties of crambe fruit at different equilibrium moisture contents. The dynamic-gravimetric method was used to collect experimental data. Crambe fruits with an initial moisture content of approximately 26% db (dry basis) were used. The thin-layer desorption of the product was conducted at different controlled temperatures (25, 30, 35, 40, and 45°C) and at water activity levels ranging from 0.10 to 0.89 until the product reached the equilibrium moisture content at the specified air condition. In conclusion, the thermodynamic properties of crambe fruit are affected by temperature and moisture content. The isokinetic theory is valid for the desorption process, which is controlled by enthalpy,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.03.03.00-7 Crambe abyssinica; Enthalpy; Entropy; Gibbs free energy; Enharia de Processamento de Produtos Agrícolas. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32516 |
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| Sousa, Kelly Aparecida; Resende, Osvaldo; Goneli, André Luis Duarte; Smaniotto, Thaís Adriana de Souza; Oliveira, Daniel Emanuel Cabral de. |
| The purpose of this study was to determine the thermodynamic properties of the process of water sorption in forage turnip seeds. The equilibrium moisture content of forage turnip seeds was determined by the gravimetric-dynamic method for different values of temperature and water activity. According to the results, increasing the moisture content increases the energy required for the evaporation of water in forage turnip seeds, and the values of integral isosteric heat of desorption, within the moisture content range of 3.33 to 11.30 (% d.b.), varies from 4,222.70 to 2,870.34 kJ kg-1. With the elevation in the equilibrium moisture content, there is an increase in differential entropy and Gibbs free energy, which has positive values, demonstrating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências Ágrarias; Armazenamento de produtos agrícolas hygroscopic equilibrium; Isosteric heat; Gibbs free energy; Compensation theory Ciências Ágrarias; Armazenamento de produtos agrícolas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19333 |
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